assert package - github.com/stretchr/testify/assert

assert package - github.com/stretchr/testify/assert - Go Packages

Package assert provides a set of comprehensive testing tools for use with the normal Go testing system.

Note ¶

All functions in this package return a bool value indicating whether the assertion has passed.

Example Usage ¶

The following is a complete example using assert in a standard test function:

import (
  "testing"
  "github.com/stretchr/testify/assert"
)

func TestSomething(t *testing.T) {

  var a string = "Hello"
  var b string = "Hello"

  assert.Equal(t, a, b, "The two words should be the same.")

}

if you assert many times, use the format below:

import (
  "testing"
  "github.com/stretchr/testify/assert"
)

func TestSomething(t *testing.T) {
  assert := assert.New(t)

  var a string = "Hello"
  var b string = "Hello"

  assert.Equal(a, b, "The two words should be the same.")
}

Assertions ¶

Assertions allow you to easily write test code, and are global funcs in the `assert` package. All assertion functions take, as the first argument, the `*testing.T` object provided by the testing framework. This allows the assertion funcs to write the failings and other details to the correct place.

Every assertion function also takes an optional string message as the final argument, allowing custom error messages to be appended to the message the assertion method outputs.

This section is empty.

AnError is an error instance useful for testing. If the code does not care about error specifics, and only needs to return the error for example, this error should be used to make the test code more readable.

CallerInfo returns an array of strings containing the file and line number of each stack frame leading from the current test to the assert call that failed.

func Condition(t TestingT, comp Comparison, msgAndArgs ...interface{}) bool

Condition uses a Comparison to assert a complex condition.

func Conditionf(t TestingT, comp Comparison, msg string, args ...interface{}) bool

Conditionf uses a Comparison to assert a complex condition.

func Contains(t TestingT, s, contains interface{}, msgAndArgs ...interface{}) bool

Contains asserts that the specified string, list(array, slice...) or map contains the specified substring or element.

assert.Contains(t, "Hello World", "World")
assert.Contains(t, ["Hello", "World"], "World")
assert.Contains(t, {"Hello": "World"}, "Hello")

func Containsf(t TestingT, s interface{}, contains interface{}, msg string, args ...interface{}) bool

Containsf asserts that the specified string, list(array, slice...) or map contains the specified substring or element.

assert.Containsf(t, "Hello World", "World", "error message %s", "formatted")
assert.Containsf(t, ["Hello", "World"], "World", "error message %s", "formatted")
assert.Containsf(t, {"Hello": "World"}, "Hello", "error message %s", "formatted")

func DirExists(t TestingT, path string, msgAndArgs ...interface{}) bool

DirExists checks whether a directory exists in the given path. It also fails if the path is a file rather a directory or there is an error checking whether it exists.

DirExistsf checks whether a directory exists in the given path. It also fails if the path is a file rather a directory or there is an error checking whether it exists.

func ElementsMatch(t TestingT, listA, listB interface{}, msgAndArgs ...interface{}) (ok bool)

ElementsMatch asserts that the specified listA(array, slice...) is equal to specified listB(array, slice...) ignoring the order of the elements. If there are duplicate elements, the number of appearances of each of them in both lists should match.

assert.ElementsMatch(t, [1, 3, 2, 3], [1, 3, 3, 2])

func ElementsMatchf(t TestingT, listA interface{}, listB interface{}, msg string, args ...interface{}) bool

ElementsMatchf asserts that the specified listA(array, slice...) is equal to specified listB(array, slice...) ignoring the order of the elements. If there are duplicate elements, the number of appearances of each of them in both lists should match.

assert.ElementsMatchf(t, [1, 3, 2, 3], [1, 3, 3, 2], "error message %s", "formatted")

func Empty(t TestingT, object interface{}, msgAndArgs ...interface{}) bool

Empty asserts that the given value is "empty".

Zero values are "empty".

Arrays are "empty" if every element is the zero value of the type (stricter than "empty").

Slices, maps and channels with zero length are "empty".

Pointer values are "empty" if the pointer is nil or if the pointed value is "empty".

assert.Empty(t, obj)

func Emptyf(t TestingT, object interface{}, msg string, args ...interface{}) bool

Emptyf asserts that the given value is "empty".

Zero values are "empty".

Arrays are "empty" if every element is the zero value of the type (stricter than "empty").

Slices, maps and channels with zero length are "empty".

Pointer values are "empty" if the pointer is nil or if the pointed value is "empty".

assert.Emptyf(t, obj, "error message %s", "formatted")

func Equal(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool

Equal asserts that two objects are equal.

assert.Equal(t, 123, 123)

Pointer variable equality is determined based on the equality of the referenced values (as opposed to the memory addresses). Function equality cannot be determined and will always fail.

func EqualError(t TestingT, theError error, errString string, msgAndArgs ...interface{}) bool

EqualError asserts that a function returned an error (i.e. not `nil`) and that it is equal to the provided error.

actualObj, err := SomeFunction()
assert.EqualError(t, err,  expectedErrorString)

EqualErrorf asserts that a function returned an error (i.e. not `nil`) and that it is equal to the provided error.

actualObj, err := SomeFunction()
assert.EqualErrorf(t, err,  expectedErrorString, "error message %s", "formatted")

func EqualExportedValues(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool

EqualExportedValues asserts that the types of two objects are equal and their public fields are also equal. This is useful for comparing structs that have private fields that could potentially differ.

 type S struct {
	Exported     	int
	notExported   	int
 }
 assert.EqualExportedValues(t, S{1, 2}, S{1, 3}) => true
 assert.EqualExportedValues(t, S{1, 2}, S{2, 3}) => false

func EqualExportedValuesf(t TestingT, expected interface{}, actual interface{}, msg string, args ...interface{}) bool

EqualExportedValuesf asserts that the types of two objects are equal and their public fields are also equal. This is useful for comparing structs that have private fields that could potentially differ.

 type S struct {
	Exported     	int
	notExported   	int
 }
 assert.EqualExportedValuesf(t, S{1, 2}, S{1, 3}, "error message %s", "formatted") => true
 assert.EqualExportedValuesf(t, S{1, 2}, S{2, 3}, "error message %s", "formatted") => false

func EqualValues(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool

EqualValues asserts that two objects are equal or convertible to the larger type and equal.

assert.EqualValues(t, uint32(123), int32(123))

func EqualValuesf(t TestingT, expected interface{}, actual interface{}, msg string, args ...interface{}) bool

EqualValuesf asserts that two objects are equal or convertible to the larger type and equal.

assert.EqualValuesf(t, uint32(123), int32(123), "error message %s", "formatted")

func Equalf(t TestingT, expected interface{}, actual interface{}, msg string, args ...interface{}) bool

Equalf asserts that two objects are equal.

assert.Equalf(t, 123, 123, "error message %s", "formatted")

Pointer variable equality is determined based on the equality of the referenced values (as opposed to the memory addresses). Function equality cannot be determined and will always fail.

func Error(t TestingT, err error, msgAndArgs ...interface{}) bool

Error asserts that a function returned an error (i.e. not `nil`).

actualObj, err := SomeFunction()
assert.Error(t, err)

func ErrorAs(t TestingT, err error, target interface{}, msgAndArgs ...interface{}) bool

ErrorAs asserts that at least one of the errors in err's chain matches target, and if so, sets target to that error value. This is a wrapper for errors.As.

func ErrorAsf(t TestingT, err error, target interface{}, msg string, args ...interface{}) bool

ErrorAsf asserts that at least one of the errors in err's chain matches target, and if so, sets target to that error value. This is a wrapper for errors.As.

func ErrorContains(t TestingT, theError error, contains string, msgAndArgs ...interface{}) bool

ErrorContains asserts that a function returned an error (i.e. not `nil`) and that the error contains the specified substring.

actualObj, err := SomeFunction()
assert.ErrorContains(t, err,  expectedErrorSubString)

ErrorContainsf asserts that a function returned an error (i.e. not `nil`) and that the error contains the specified substring.

actualObj, err := SomeFunction()
assert.ErrorContainsf(t, err,  expectedErrorSubString, "error message %s", "formatted")

func ErrorIs(t TestingT, err, target error, msgAndArgs ...interface{}) bool

ErrorIs asserts that at least one of the errors in err's chain matches target. This is a wrapper for errors.Is.

ErrorIsf asserts that at least one of the errors in err's chain matches target. This is a wrapper for errors.Is.

Errorf asserts that a function returned an error (i.e. not `nil`).

actualObj, err := SomeFunction()
assert.Errorf(t, err, "error message %s", "formatted")

Eventually asserts that given condition will be met in waitFor time, periodically checking target function each tick.

assert.Eventually(t, func() bool { return true; }, time.Second, 10*time.Millisecond)

EventuallyWithT asserts that given condition will be met in waitFor time, periodically checking target function each tick. In contrast to Eventually, it supplies a CollectT to the condition function, so that the condition function can use the CollectT to call other assertions. The condition is considered "met" if no errors are raised in a tick. The supplied CollectT collects all errors from one tick (if there are any). If the condition is not met before waitFor, the collected errors of the last tick are copied to t.

externalValue := false
go func() {
	time.Sleep(8*time.Second)
	externalValue = true
}()
assert.EventuallyWithT(t, func(c *assert.CollectT) {
	// add assertions as needed; any assertion failure will fail the current tick
	assert.True(c, externalValue, "expected 'externalValue' to be true")
}, 10*time.Second, 1*time.Second, "external state has not changed to 'true'; still false")

EventuallyWithTf asserts that given condition will be met in waitFor time, periodically checking target function each tick. In contrast to Eventually, it supplies a CollectT to the condition function, so that the condition function can use the CollectT to call other assertions. The condition is considered "met" if no errors are raised in a tick. The supplied CollectT collects all errors from one tick (if there are any). If the condition is not met before waitFor, the collected errors of the last tick are copied to t.

externalValue := false
go func() {
	time.Sleep(8*time.Second)
	externalValue = true
}()
assert.EventuallyWithTf(t, func(c *assert.CollectT, "error message %s", "formatted") {
	// add assertions as needed; any assertion failure will fail the current tick
	assert.True(c, externalValue, "expected 'externalValue' to be true")
}, 10*time.Second, 1*time.Second, "external state has not changed to 'true'; still false")

Eventuallyf asserts that given condition will be met in waitFor time, periodically checking target function each tick.

assert.Eventuallyf(t, func() bool { return true; }, time.Second, 10*time.Millisecond, "error message %s", "formatted")

func Exactly(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool

Exactly asserts that two objects are equal in value and type.

assert.Exactly(t, int32(123), int64(123))

func Exactlyf(t TestingT, expected interface{}, actual interface{}, msg string, args ...interface{}) bool

Exactlyf asserts that two objects are equal in value and type.

assert.Exactlyf(t, int32(123), int64(123), "error message %s", "formatted")

func Fail(t TestingT, failureMessage string, msgAndArgs ...interface{}) bool

Fail reports a failure through

func FailNow(t TestingT, failureMessage string, msgAndArgs ...interface{}) bool

FailNow fails test

Failf reports a failure through

func False(t TestingT, value bool, msgAndArgs ...interface{}) bool

False asserts that the specified value is false.

assert.False(t, myBool)

Falsef asserts that the specified value is false.

assert.Falsef(t, myBool, "error message %s", "formatted")

func FileExists(t TestingT, path string, msgAndArgs ...interface{}) bool

FileExists checks whether a file exists in the given path. It also fails if the path points to a directory or there is an error when trying to check the file.

FileExistsf checks whether a file exists in the given path. It also fails if the path points to a directory or there is an error when trying to check the file.

func Greater(t TestingT, e1 interface{}, e2 interface{}, msgAndArgs ...interface{}) bool

Greater asserts that the first element is greater than the second

assert.Greater(t, 2, 1)
assert.Greater(t, float64(2), float64(1))
assert.Greater(t, "b", "a")

func GreaterOrEqual(t TestingT, e1 interface{}, e2 interface{}, msgAndArgs ...interface{}) bool

GreaterOrEqual asserts that the first element is greater than or equal to the second

assert.GreaterOrEqual(t, 2, 1)
assert.GreaterOrEqual(t, 2, 2)
assert.GreaterOrEqual(t, "b", "a")
assert.GreaterOrEqual(t, "b", "b")

func GreaterOrEqualf(t TestingT, e1 interface{}, e2 interface{}, msg string, args ...interface{}) bool

GreaterOrEqualf asserts that the first element is greater than or equal to the second

assert.GreaterOrEqualf(t, 2, 1, "error message %s", "formatted")
assert.GreaterOrEqualf(t, 2, 2, "error message %s", "formatted")
assert.GreaterOrEqualf(t, "b", "a", "error message %s", "formatted")
assert.GreaterOrEqualf(t, "b", "b", "error message %s", "formatted")

func Greaterf(t TestingT, e1 interface{}, e2 interface{}, msg string, args ...interface{}) bool

Greaterf asserts that the first element is greater than the second

assert.Greaterf(t, 2, 1, "error message %s", "formatted")
assert.Greaterf(t, float64(2), float64(1), "error message %s", "formatted")
assert.Greaterf(t, "b", "a", "error message %s", "formatted")

func HTTPBody ¶

HTTPBody is a helper that returns HTTP body of the response. It returns empty string if building a new request fails.

func HTTPBodyContains ¶

HTTPBodyContains asserts that a specified handler returns a body that contains a string.

assert.HTTPBodyContains(t, myHandler, "GET", "www.google.com", nil, "I'm Feeling Lucky")

Returns whether the assertion was successful (true) or not (false).

func HTTPBodyContainsf ¶ added in v1.2.0

HTTPBodyContainsf asserts that a specified handler returns a body that contains a string.

assert.HTTPBodyContainsf(t, myHandler, "GET", "www.google.com", nil, "I'm Feeling Lucky", "error message %s", "formatted")

Returns whether the assertion was successful (true) or not (false).

func HTTPBodyNotContains ¶

HTTPBodyNotContains asserts that a specified handler returns a body that does not contain a string.

assert.HTTPBodyNotContains(t, myHandler, "GET", "www.google.com", nil, "I'm Feeling Lucky")

Returns whether the assertion was successful (true) or not (false).

func HTTPBodyNotContainsf ¶ added in v1.2.0

HTTPBodyNotContainsf asserts that a specified handler returns a body that does not contain a string.

assert.HTTPBodyNotContainsf(t, myHandler, "GET", "www.google.com", nil, "I'm Feeling Lucky", "error message %s", "formatted")

Returns whether the assertion was successful (true) or not (false).

HTTPError asserts that a specified handler returns an error status code.

assert.HTTPError(t, myHandler, "POST", "/a/b/c", url.Values{"a": []string{"b", "c"}}

Returns whether the assertion was successful (true) or not (false).

HTTPErrorf asserts that a specified handler returns an error status code.

assert.HTTPErrorf(t, myHandler, "POST", "/a/b/c", url.Values{"a": []string{"b", "c"}}

Returns whether the assertion was successful (true) or not (false).

HTTPRedirect asserts that a specified handler returns a redirect status code.

assert.HTTPRedirect(t, myHandler, "GET", "/a/b/c", url.Values{"a": []string{"b", "c"}}

Returns whether the assertion was successful (true) or not (false).

HTTPRedirectf asserts that a specified handler returns a redirect status code.

assert.HTTPRedirectf(t, myHandler, "GET", "/a/b/c", url.Values{"a": []string{"b", "c"}}

Returns whether the assertion was successful (true) or not (false).

HTTPStatusCode asserts that a specified handler returns a specified status code.

assert.HTTPStatusCode(t, myHandler, "GET", "/notImplemented", nil, 501)

Returns whether the assertion was successful (true) or not (false).

HTTPStatusCodef asserts that a specified handler returns a specified status code.

assert.HTTPStatusCodef(t, myHandler, "GET", "/notImplemented", nil, 501, "error message %s", "formatted")

Returns whether the assertion was successful (true) or not (false).

HTTPSuccess asserts that a specified handler returns a success status code.

assert.HTTPSuccess(t, myHandler, "POST", "http://www.google.com", nil)

Returns whether the assertion was successful (true) or not (false).

HTTPSuccessf asserts that a specified handler returns a success status code.

assert.HTTPSuccessf(t, myHandler, "POST", "http://www.google.com", nil, "error message %s", "formatted")

Returns whether the assertion was successful (true) or not (false).

func Implements(t TestingT, interfaceObject interface{}, object interface{}, msgAndArgs ...interface{}) bool

Implements asserts that an object is implemented by the specified interface.

assert.Implements(t, (*MyInterface)(nil), new(MyObject))

func Implementsf(t TestingT, interfaceObject interface{}, object interface{}, msg string, args ...interface{}) bool

Implementsf asserts that an object is implemented by the specified interface.

assert.Implementsf(t, (*MyInterface)(nil), new(MyObject), "error message %s", "formatted")

func InDelta(t TestingT, expected, actual interface{}, delta float64, msgAndArgs ...interface{}) bool

InDelta asserts that the two numerals are within delta of each other.

assert.InDelta(t, math.Pi, 22/7.0, 0.01)

func InDeltaMapValues(t TestingT, expected, actual interface{}, delta float64, msgAndArgs ...interface{}) bool

InDeltaMapValues is the same as InDelta, but it compares all values between two maps. Both maps must have exactly the same keys.

func InDeltaMapValuesf(t TestingT, expected interface{}, actual interface{}, delta float64, msg string, args ...interface{}) bool

InDeltaMapValuesf is the same as InDelta, but it compares all values between two maps. Both maps must have exactly the same keys.

func InDeltaSlice(t TestingT, expected, actual interface{}, delta float64, msgAndArgs ...interface{}) bool

InDeltaSlice is the same as InDelta, except it compares two slices.

func InDeltaSlicef(t TestingT, expected interface{}, actual interface{}, delta float64, msg string, args ...interface{}) bool

InDeltaSlicef is the same as InDelta, except it compares two slices.

func InDeltaf(t TestingT, expected interface{}, actual interface{}, delta float64, msg string, args ...interface{}) bool

InDeltaf asserts that the two numerals are within delta of each other.

assert.InDeltaf(t, math.Pi, 22/7.0, 0.01, "error message %s", "formatted")

func InEpsilon(t TestingT, expected, actual interface{}, epsilon float64, msgAndArgs ...interface{}) bool

InEpsilon asserts that expected and actual have a relative error less than epsilon

func InEpsilonSlice(t TestingT, expected, actual interface{}, epsilon float64, msgAndArgs ...interface{}) bool

InEpsilonSlice is the same as InEpsilon, except it compares each value from two slices.

func InEpsilonSlicef(t TestingT, expected interface{}, actual interface{}, epsilon float64, msg string, args ...interface{}) bool

InEpsilonSlicef is the same as InEpsilon, except it compares each value from two slices.

func InEpsilonf(t TestingT, expected interface{}, actual interface{}, epsilon float64, msg string, args ...interface{}) bool

InEpsilonf asserts that expected and actual have a relative error less than epsilon

func IsDecreasing(t TestingT, object interface{}, msgAndArgs ...interface{}) bool

IsDecreasing asserts that the collection is decreasing

assert.IsDecreasing(t, []int{2, 1, 0})
assert.IsDecreasing(t, []float{2, 1})
assert.IsDecreasing(t, []string{"b", "a"})

func IsDecreasingf(t TestingT, object interface{}, msg string, args ...interface{}) bool

IsDecreasingf asserts that the collection is decreasing

assert.IsDecreasingf(t, []int{2, 1, 0}, "error message %s", "formatted")
assert.IsDecreasingf(t, []float{2, 1}, "error message %s", "formatted")
assert.IsDecreasingf(t, []string{"b", "a"}, "error message %s", "formatted")

func IsIncreasing(t TestingT, object interface{}, msgAndArgs ...interface{}) bool

IsIncreasing asserts that the collection is increasing

assert.IsIncreasing(t, []int{1, 2, 3})
assert.IsIncreasing(t, []float{1, 2})
assert.IsIncreasing(t, []string{"a", "b"})

func IsIncreasingf(t TestingT, object interface{}, msg string, args ...interface{}) bool

IsIncreasingf asserts that the collection is increasing

assert.IsIncreasingf(t, []int{1, 2, 3}, "error message %s", "formatted")
assert.IsIncreasingf(t, []float{1, 2}, "error message %s", "formatted")
assert.IsIncreasingf(t, []string{"a", "b"}, "error message %s", "formatted")

func IsNonDecreasing(t TestingT, object interface{}, msgAndArgs ...interface{}) bool

IsNonDecreasing asserts that the collection is not decreasing

assert.IsNonDecreasing(t, []int{1, 1, 2})
assert.IsNonDecreasing(t, []float{1, 2})
assert.IsNonDecreasing(t, []string{"a", "b"})

func IsNonDecreasingf(t TestingT, object interface{}, msg string, args ...interface{}) bool

IsNonDecreasingf asserts that the collection is not decreasing

assert.IsNonDecreasingf(t, []int{1, 1, 2}, "error message %s", "formatted")
assert.IsNonDecreasingf(t, []float{1, 2}, "error message %s", "formatted")
assert.IsNonDecreasingf(t, []string{"a", "b"}, "error message %s", "formatted")

func IsNonIncreasing(t TestingT, object interface{}, msgAndArgs ...interface{}) bool

IsNonIncreasing asserts that the collection is not increasing

assert.IsNonIncreasing(t, []int{2, 1, 1})
assert.IsNonIncreasing(t, []float{2, 1})
assert.IsNonIncreasing(t, []string{"b", "a"})

func IsNonIncreasingf(t TestingT, object interface{}, msg string, args ...interface{}) bool

IsNonIncreasingf asserts that the collection is not increasing

assert.IsNonIncreasingf(t, []int{2, 1, 1}, "error message %s", "formatted")
assert.IsNonIncreasingf(t, []float{2, 1}, "error message %s", "formatted")
assert.IsNonIncreasingf(t, []string{"b", "a"}, "error message %s", "formatted")

func IsNotType(t TestingT, theType, object interface{}, msgAndArgs ...interface{}) bool

IsNotType asserts that the specified objects are not of the same type.

assert.IsNotType(t, &NotMyStruct{}, &MyStruct{})

func IsNotTypef(t TestingT, theType interface{}, object interface{}, msg string, args ...interface{}) bool

IsNotTypef asserts that the specified objects are not of the same type.

assert.IsNotTypef(t, &NotMyStruct{}, &MyStruct{}, "error message %s", "formatted")

func IsType(t TestingT, expectedType, object interface{}, msgAndArgs ...interface{}) bool

IsType asserts that the specified objects are of the same type.

assert.IsType(t, &MyStruct{}, &MyStruct{})

func IsTypef(t TestingT, expectedType interface{}, object interface{}, msg string, args ...interface{}) bool

IsTypef asserts that the specified objects are of the same type.

assert.IsTypef(t, &MyStruct{}, &MyStruct{}, "error message %s", "formatted")

JSONEq asserts that two JSON strings are equivalent.

assert.JSONEq(t, `{"hello": "world", "foo": "bar"}`, `{"foo": "bar", "hello": "world"}`)

JSONEqf asserts that two JSON strings are equivalent.

assert.JSONEqf(t, `{"hello": "world", "foo": "bar"}`, `{"foo": "bar", "hello": "world"}`, "error message %s", "formatted")

func Len(t TestingT, object interface{}, length int, msgAndArgs ...interface{}) bool

Len asserts that the specified object has specific length. Len also fails if the object has a type that len() not accept.

assert.Len(t, mySlice, 3)

func Lenf(t TestingT, object interface{}, length int, msg string, args ...interface{}) bool

Lenf asserts that the specified object has specific length. Lenf also fails if the object has a type that len() not accept.

assert.Lenf(t, mySlice, 3, "error message %s", "formatted")

func Less(t TestingT, e1 interface{}, e2 interface{}, msgAndArgs ...interface{}) bool

Less asserts that the first element is less than the second

assert.Less(t, 1, 2)
assert.Less(t, float64(1), float64(2))
assert.Less(t, "a", "b")

func LessOrEqual(t TestingT, e1 interface{}, e2 interface{}, msgAndArgs ...interface{}) bool

LessOrEqual asserts that the first element is less than or equal to the second

assert.LessOrEqual(t, 1, 2)
assert.LessOrEqual(t, 2, 2)
assert.LessOrEqual(t, "a", "b")
assert.LessOrEqual(t, "b", "b")

func LessOrEqualf(t TestingT, e1 interface{}, e2 interface{}, msg string, args ...interface{}) bool

LessOrEqualf asserts that the first element is less than or equal to the second

assert.LessOrEqualf(t, 1, 2, "error message %s", "formatted")
assert.LessOrEqualf(t, 2, 2, "error message %s", "formatted")
assert.LessOrEqualf(t, "a", "b", "error message %s", "formatted")
assert.LessOrEqualf(t, "b", "b", "error message %s", "formatted")

func Lessf(t TestingT, e1 interface{}, e2 interface{}, msg string, args ...interface{}) bool

Lessf asserts that the first element is less than the second

assert.Lessf(t, 1, 2, "error message %s", "formatted")
assert.Lessf(t, float64(1), float64(2), "error message %s", "formatted")
assert.Lessf(t, "a", "b", "error message %s", "formatted")

func Negative(t TestingT, e interface{}, msgAndArgs ...interface{}) bool

Negative asserts that the specified element is negative

assert.Negative(t, -1)
assert.Negative(t, -1.23)

func Negativef(t TestingT, e interface{}, msg string, args ...interface{}) bool

Negativef asserts that the specified element is negative

assert.Negativef(t, -1, "error message %s", "formatted")
assert.Negativef(t, -1.23, "error message %s", "formatted")

Never asserts that the given condition doesn't satisfy in waitFor time, periodically checking the target function each tick.

assert.Never(t, func() bool { return false; }, time.Second, 10*time.Millisecond)

Neverf asserts that the given condition doesn't satisfy in waitFor time, periodically checking the target function each tick.

assert.Neverf(t, func() bool { return false; }, time.Second, 10*time.Millisecond, "error message %s", "formatted")

func Nil(t TestingT, object interface{}, msgAndArgs ...interface{}) bool

Nil asserts that the specified object is nil.

assert.Nil(t, err)

func Nilf(t TestingT, object interface{}, msg string, args ...interface{}) bool

Nilf asserts that the specified object is nil.

assert.Nilf(t, err, "error message %s", "formatted")

func NoDirExists(t TestingT, path string, msgAndArgs ...interface{}) bool

NoDirExists checks whether a directory does not exist in the given path. It fails if the path points to an existing _directory_ only.

NoDirExistsf checks whether a directory does not exist in the given path. It fails if the path points to an existing _directory_ only.

func NoError(t TestingT, err error, msgAndArgs ...interface{}) bool

NoError asserts that a function returned no error (i.e. `nil`).

  actualObj, err := SomeFunction()
  if assert.NoError(t, err) {
	   assert.Equal(t, expectedObj, actualObj)
  }

NoErrorf asserts that a function returned no error (i.e. `nil`).

  actualObj, err := SomeFunction()
  if assert.NoErrorf(t, err, "error message %s", "formatted") {
	   assert.Equal(t, expectedObj, actualObj)
  }

func NoFileExists(t TestingT, path string, msgAndArgs ...interface{}) bool

NoFileExists checks whether a file does not exist in a given path. It fails if the path points to an existing _file_ only.

NoFileExistsf checks whether a file does not exist in a given path. It fails if the path points to an existing _file_ only.

func NotContains(t TestingT, s, contains interface{}, msgAndArgs ...interface{}) bool

NotContains asserts that the specified string, list(array, slice...) or map does NOT contain the specified substring or element.

assert.NotContains(t, "Hello World", "Earth")
assert.NotContains(t, ["Hello", "World"], "Earth")
assert.NotContains(t, {"Hello": "World"}, "Earth")

func NotContainsf(t TestingT, s interface{}, contains interface{}, msg string, args ...interface{}) bool

NotContainsf asserts that the specified string, list(array, slice...) or map does NOT contain the specified substring or element.

assert.NotContainsf(t, "Hello World", "Earth", "error message %s", "formatted")
assert.NotContainsf(t, ["Hello", "World"], "Earth", "error message %s", "formatted")
assert.NotContainsf(t, {"Hello": "World"}, "Earth", "error message %s", "formatted")

func NotElementsMatch(t TestingT, listA, listB interface{}, msgAndArgs ...interface{}) (ok bool)

NotElementsMatch asserts that the specified listA(array, slice...) is NOT equal to specified listB(array, slice...) ignoring the order of the elements. If there are duplicate elements, the number of appearances of each of them in both lists should not match. This is an inverse of ElementsMatch.

assert.NotElementsMatch(t, [1, 1, 2, 3], [1, 1, 2, 3]) -> false

assert.NotElementsMatch(t, [1, 1, 2, 3], [1, 2, 3]) -> true

assert.NotElementsMatch(t, [1, 2, 3], [1, 2, 4]) -> true

func NotElementsMatchf(t TestingT, listA interface{}, listB interface{}, msg string, args ...interface{}) bool

NotElementsMatchf asserts that the specified listA(array, slice...) is NOT equal to specified listB(array, slice...) ignoring the order of the elements. If there are duplicate elements, the number of appearances of each of them in both lists should not match. This is an inverse of ElementsMatch.

assert.NotElementsMatchf(t, [1, 1, 2, 3], [1, 1, 2, 3], "error message %s", "formatted") -> false

assert.NotElementsMatchf(t, [1, 1, 2, 3], [1, 2, 3], "error message %s", "formatted") -> true

assert.NotElementsMatchf(t, [1, 2, 3], [1, 2, 4], "error message %s", "formatted") -> true

func NotEmpty(t TestingT, object interface{}, msgAndArgs ...interface{}) bool

NotEmpty asserts that the specified object is NOT Empty.

if assert.NotEmpty(t, obj) {
  assert.Equal(t, "two", obj[1])
}

func NotEmptyf(t TestingT, object interface{}, msg string, args ...interface{}) bool

NotEmptyf asserts that the specified object is NOT Empty.

if assert.NotEmptyf(t, obj, "error message %s", "formatted") {
  assert.Equal(t, "two", obj[1])
}

func NotEqual(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool

NotEqual asserts that the specified values are NOT equal.

assert.NotEqual(t, obj1, obj2)

Pointer variable equality is determined based on the equality of the referenced values (as opposed to the memory addresses).

func NotEqualValues(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool

NotEqualValues asserts that two objects are not equal even when converted to the same type

assert.NotEqualValues(t, obj1, obj2)

func NotEqualValuesf(t TestingT, expected interface{}, actual interface{}, msg string, args ...interface{}) bool

NotEqualValuesf asserts that two objects are not equal even when converted to the same type

assert.NotEqualValuesf(t, obj1, obj2, "error message %s", "formatted")

func NotEqualf(t TestingT, expected interface{}, actual interface{}, msg string, args ...interface{}) bool

NotEqualf asserts that the specified values are NOT equal.

assert.NotEqualf(t, obj1, obj2, "error message %s", "formatted")

Pointer variable equality is determined based on the equality of the referenced values (as opposed to the memory addresses).

func NotErrorAs(t TestingT, err error, target interface{}, msgAndArgs ...interface{}) bool

NotErrorAs asserts that none of the errors in err's chain matches target, but if so, sets target to that error value.

func NotErrorAsf(t TestingT, err error, target interface{}, msg string, args ...interface{}) bool

NotErrorAsf asserts that none of the errors in err's chain matches target, but if so, sets target to that error value.

func NotErrorIs(t TestingT, err, target error, msgAndArgs ...interface{}) bool

NotErrorIs asserts that none of the errors in err's chain matches target. This is a wrapper for errors.Is.

NotErrorIsf asserts that none of the errors in err's chain matches target. This is a wrapper for errors.Is.

func NotImplements(t TestingT, interfaceObject interface{}, object interface{}, msgAndArgs ...interface{}) bool

NotImplements asserts that an object does not implement the specified interface.

assert.NotImplements(t, (*MyInterface)(nil), new(MyObject))

func NotImplementsf(t TestingT, interfaceObject interface{}, object interface{}, msg string, args ...interface{}) bool

NotImplementsf asserts that an object does not implement the specified interface.

assert.NotImplementsf(t, (*MyInterface)(nil), new(MyObject), "error message %s", "formatted")

func NotNil(t TestingT, object interface{}, msgAndArgs ...interface{}) bool

NotNil asserts that the specified object is not nil.

assert.NotNil(t, err)

func NotNilf(t TestingT, object interface{}, msg string, args ...interface{}) bool

NotNilf asserts that the specified object is not nil.

assert.NotNilf(t, err, "error message %s", "formatted")

func NotPanics(t TestingT, f PanicTestFunc, msgAndArgs ...interface{}) bool

NotPanics asserts that the code inside the specified PanicTestFunc does NOT panic.

assert.NotPanics(t, func(){ RemainCalm() })

func NotPanicsf(t TestingT, f PanicTestFunc, msg string, args ...interface{}) bool

NotPanicsf asserts that the code inside the specified PanicTestFunc does NOT panic.

assert.NotPanicsf(t, func(){ RemainCalm() }, "error message %s", "formatted")

func NotRegexp(t TestingT, rx interface{}, str interface{}, msgAndArgs ...interface{}) bool

NotRegexp asserts that a specified regexp does not match a string.

assert.NotRegexp(t, regexp.MustCompile("starts"), "it's starting")
assert.NotRegexp(t, "^start", "it's not starting")

func NotRegexpf(t TestingT, rx interface{}, str interface{}, msg string, args ...interface{}) bool

NotRegexpf asserts that a specified regexp does not match a string.

assert.NotRegexpf(t, regexp.MustCompile("starts"), "it's starting", "error message %s", "formatted")
assert.NotRegexpf(t, "^start", "it's not starting", "error message %s", "formatted")

func NotSame(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool

NotSame asserts that two pointers do not reference the same object.

assert.NotSame(t, ptr1, ptr2)

Both arguments must be pointer variables. Pointer variable sameness is determined based on the equality of both type and value.

func NotSamef(t TestingT, expected interface{}, actual interface{}, msg string, args ...interface{}) bool

NotSamef asserts that two pointers do not reference the same object.

assert.NotSamef(t, ptr1, ptr2, "error message %s", "formatted")

Both arguments must be pointer variables. Pointer variable sameness is determined based on the equality of both type and value.

func NotSubset(t TestingT, list, subset interface{}, msgAndArgs ...interface{}) (ok bool)

NotSubset asserts that the list (array, slice, or map) does NOT contain all elements given in the subset (array, slice, or map). Map elements are key-value pairs unless compared with an array or slice where only the map key is evaluated.

assert.NotSubset(t, [1, 3, 4], [1, 2])
assert.NotSubset(t, {"x": 1, "y": 2}, {"z": 3})
assert.NotSubset(t, [1, 3, 4], {1: "one", 2: "two"})
assert.NotSubset(t, {"x": 1, "y": 2}, ["z"])

func NotSubsetf(t TestingT, list interface{}, subset interface{}, msg string, args ...interface{}) bool

NotSubsetf asserts that the list (array, slice, or map) does NOT contain all elements given in the subset (array, slice, or map). Map elements are key-value pairs unless compared with an array or slice where only the map key is evaluated.

assert.NotSubsetf(t, [1, 3, 4], [1, 2], "error message %s", "formatted")
assert.NotSubsetf(t, {"x": 1, "y": 2}, {"z": 3}, "error message %s", "formatted")
assert.NotSubsetf(t, [1, 3, 4], {1: "one", 2: "two"}, "error message %s", "formatted")
assert.NotSubsetf(t, {"x": 1, "y": 2}, ["z"], "error message %s", "formatted")

func NotZero(t TestingT, i interface{}, msgAndArgs ...interface{}) bool

NotZero asserts that i is not the zero value for its type.

func NotZerof(t TestingT, i interface{}, msg string, args ...interface{}) bool

NotZerof asserts that i is not the zero value for its type.

func ObjectsAreEqual(expected, actual interface{}) bool

ObjectsAreEqual determines if two objects are considered equal.

This function does no assertion of any kind.

func ObjectsAreEqualValues(expected, actual interface{}) bool

ObjectsAreEqualValues gets whether two objects are equal, or if their values are equal.

func ObjectsExportedFieldsAreEqual(expected, actual interface{}) bool

ObjectsExportedFieldsAreEqual determines if the exported (public) fields of two objects are considered equal. This comparison of only exported fields is applied recursively to nested data structures.

This function does no assertion of any kind.

Deprecated: Use EqualExportedValues instead.

func Panics(t TestingT, f PanicTestFunc, msgAndArgs ...interface{}) bool

Panics asserts that the code inside the specified PanicTestFunc panics.

assert.Panics(t, func(){ GoCrazy() })

func PanicsWithError(t TestingT, errString string, f PanicTestFunc, msgAndArgs ...interface{}) bool

PanicsWithError asserts that the code inside the specified PanicTestFunc panics, and that the recovered panic value is an error that satisfies the EqualError comparison.

assert.PanicsWithError(t, "crazy error", func(){ GoCrazy() })

PanicsWithErrorf asserts that the code inside the specified PanicTestFunc panics, and that the recovered panic value is an error that satisfies the EqualError comparison.

assert.PanicsWithErrorf(t, "crazy error", func(){ GoCrazy() }, "error message %s", "formatted")

func PanicsWithValue(t TestingT, expected interface{}, f PanicTestFunc, msgAndArgs ...interface{}) bool

PanicsWithValue asserts that the code inside the specified PanicTestFunc panics, and that the recovered panic value equals the expected panic value.

assert.PanicsWithValue(t, "crazy error", func(){ GoCrazy() })

func PanicsWithValuef(t TestingT, expected interface{}, f PanicTestFunc, msg string, args ...interface{}) bool

PanicsWithValuef asserts that the code inside the specified PanicTestFunc panics, and that the recovered panic value equals the expected panic value.

assert.PanicsWithValuef(t, "crazy error", func(){ GoCrazy() }, "error message %s", "formatted")

Panicsf asserts that the code inside the specified PanicTestFunc panics.

assert.Panicsf(t, func(){ GoCrazy() }, "error message %s", "formatted")

func Positive(t TestingT, e interface{}, msgAndArgs ...interface{}) bool

Positive asserts that the specified element is positive

assert.Positive(t, 1)
assert.Positive(t, 1.23)

func Positivef(t TestingT, e interface{}, msg string, args ...interface{}) bool

Positivef asserts that the specified element is positive

assert.Positivef(t, 1, "error message %s", "formatted")
assert.Positivef(t, 1.23, "error message %s", "formatted")

func Regexp(t TestingT, rx interface{}, str interface{}, msgAndArgs ...interface{}) bool

Regexp asserts that a specified regexp matches a string.

assert.Regexp(t, regexp.MustCompile("start"), "it's starting")
assert.Regexp(t, "start...$", "it's not starting")

func Regexpf(t TestingT, rx interface{}, str interface{}, msg string, args ...interface{}) bool

Regexpf asserts that a specified regexp matches a string.

assert.Regexpf(t, regexp.MustCompile("start"), "it's starting", "error message %s", "formatted")
assert.Regexpf(t, "start...$", "it's not starting", "error message %s", "formatted")

func Same(t TestingT, expected, actual interface{}, msgAndArgs ...interface{}) bool

Same asserts that two pointers reference the same object.

assert.Same(t, ptr1, ptr2)

Both arguments must be pointer variables. Pointer variable sameness is determined based on the equality of both type and value.

func Samef(t TestingT, expected interface{}, actual interface{}, msg string, args ...interface{}) bool

Samef asserts that two pointers reference the same object.

assert.Samef(t, ptr1, ptr2, "error message %s", "formatted")

Both arguments must be pointer variables. Pointer variable sameness is determined based on the equality of both type and value.

func Subset(t TestingT, list, subset interface{}, msgAndArgs ...interface{}) (ok bool)

Subset asserts that the list (array, slice, or map) contains all elements given in the subset (array, slice, or map). Map elements are key-value pairs unless compared with an array or slice where only the map key is evaluated.

assert.Subset(t, [1, 2, 3], [1, 2])
assert.Subset(t, {"x": 1, "y": 2}, {"x": 1})
assert.Subset(t, [1, 2, 3], {1: "one", 2: "two"})
assert.Subset(t, {"x": 1, "y": 2}, ["x"])

func Subsetf(t TestingT, list interface{}, subset interface{}, msg string, args ...interface{}) bool

Subsetf asserts that the list (array, slice, or map) contains all elements given in the subset (array, slice, or map). Map elements are key-value pairs unless compared with an array or slice where only the map key is evaluated.

assert.Subsetf(t, [1, 2, 3], [1, 2], "error message %s", "formatted")
assert.Subsetf(t, {"x": 1, "y": 2}, {"x": 1}, "error message %s", "formatted")
assert.Subsetf(t, [1, 2, 3], {1: "one", 2: "two"}, "error message %s", "formatted")
assert.Subsetf(t, {"x": 1, "y": 2}, ["x"], "error message %s", "formatted")

func True(t TestingT, value bool, msgAndArgs ...interface{}) bool

True asserts that the specified value is true.

assert.True(t, myBool)

Truef asserts that the specified value is true.

assert.Truef(t, myBool, "error message %s", "formatted")

WithinDuration asserts that the two times are within duration delta of each other.

assert.WithinDuration(t, time.Now(), time.Now(), 10*time.Second)

WithinDurationf asserts that the two times are within duration delta of each other.

assert.WithinDurationf(t, time.Now(), time.Now(), 10*time.Second, "error message %s", "formatted")

func WithinRange(t TestingT, actual, start, end time.Time, msgAndArgs ...interface{}) bool

WithinRange asserts that a time is within a time range (inclusive).

assert.WithinRange(t, time.Now(), time.Now().Add(-time.Second), time.Now().Add(time.Second))

WithinRangef asserts that a time is within a time range (inclusive).

assert.WithinRangef(t, time.Now(), time.Now().Add(-time.Second), time.Now().Add(time.Second), "error message %s", "formatted")

YAMLEq asserts that two YAML strings are equivalent.

YAMLEqf asserts that two YAML strings are equivalent.

func Zero(t TestingT, i interface{}, msgAndArgs ...interface{}) bool

Zero asserts that i is the zero value for its type.

func Zerof(t TestingT, i interface{}, msg string, args ...interface{}) bool

Zerof asserts that i is the zero value for its type.

type Assertions struct {
	
}

Assertions provides assertion methods around the TestingT interface.

func New(t TestingT) *Assertions

New makes a new Assertions object for the specified TestingT.

func (a *Assertions) Condition(comp Comparison, msgAndArgs ...interface{}) bool

Condition uses a Comparison to assert a complex condition.

func (a *Assertions) Conditionf(comp Comparison, msg string, args ...interface{}) bool

Conditionf uses a Comparison to assert a complex condition.

func (a *Assertions) Contains(s interface{}, contains interface{}, msgAndArgs ...interface{}) bool

Contains asserts that the specified string, list(array, slice...) or map contains the specified substring or element.

a.Contains("Hello World", "World")
a.Contains(["Hello", "World"], "World")
a.Contains({"Hello": "World"}, "Hello")

func (a *Assertions) Containsf(s interface{}, contains interface{}, msg string, args ...interface{}) bool

Containsf asserts that the specified string, list(array, slice...) or map contains the specified substring or element.

a.Containsf("Hello World", "World", "error message %s", "formatted")
a.Containsf(["Hello", "World"], "World", "error message %s", "formatted")
a.Containsf({"Hello": "World"}, "Hello", "error message %s", "formatted")

func (a *Assertions) DirExists(path string, msgAndArgs ...interface{}) bool

DirExists checks whether a directory exists in the given path. It also fails if the path is a file rather a directory or there is an error checking whether it exists.

DirExistsf checks whether a directory exists in the given path. It also fails if the path is a file rather a directory or there is an error checking whether it exists.

func (a *Assertions) ElementsMatch(listA interface{}, listB interface{}, msgAndArgs ...interface{}) bool

a.ElementsMatch([1, 3, 2, 3], [1, 3, 3, 2])

func (a *Assertions) ElementsMatchf(listA interface{}, listB interface{}, msg string, args ...interface{}) bool

a.ElementsMatchf([1, 3, 2, 3], [1, 3, 3, 2], "error message %s", "formatted")

func (a *Assertions) Empty(object interface{}, msgAndArgs ...interface{}) bool

Empty asserts that the given value is "empty".

Zero values are "empty".

Arrays are "empty" if every element is the zero value of the type (stricter than "empty").

Slices, maps and channels with zero length are "empty".

Pointer values are "empty" if the pointer is nil or if the pointed value is "empty".

a.Empty(obj)

func (a *Assertions) Emptyf(object interface{}, msg string, args ...interface{}) bool

Emptyf asserts that the given value is "empty".

Zero values are "empty".

Arrays are "empty" if every element is the zero value of the type (stricter than "empty").

Slices, maps and channels with zero length are "empty".

Pointer values are "empty" if the pointer is nil or if the pointed value is "empty".

a.Emptyf(obj, "error message %s", "formatted")

func (a *Assertions) Equal(expected interface{}, actual interface{}, msgAndArgs ...interface{}) bool

Equal asserts that two objects are equal.

a.Equal(123, 123)

Pointer variable equality is determined based on the equality of the referenced values (as opposed to the memory addresses). Function equality cannot be determined and will always fail.

func (a *Assertions) EqualError(theError error, errString string, msgAndArgs ...interface{}) bool

EqualError asserts that a function returned an error (i.e. not `nil`) and that it is equal to the provided error.

actualObj, err := SomeFunction()
a.EqualError(err,  expectedErrorString)

EqualErrorf asserts that a function returned an error (i.e. not `nil`) and that it is equal to the provided error.

actualObj, err := SomeFunction()
a.EqualErrorf(err,  expectedErrorString, "error message %s", "formatted")

func (a *Assertions) EqualExportedValues(expected interface{}, actual interface{}, msgAndArgs ...interface{}) bool

 type S struct {
	Exported     	int
	notExported   	int
 }
 a.EqualExportedValues(S{1, 2}, S{1, 3}) => true
 a.EqualExportedValues(S{1, 2}, S{2, 3}) => false

func (a *Assertions) EqualExportedValuesf(expected interface{}, actual interface{}, msg string, args ...interface{}) bool

 type S struct {
	Exported     	int
	notExported   	int
 }
 a.EqualExportedValuesf(S{1, 2}, S{1, 3}, "error message %s", "formatted") => true
 a.EqualExportedValuesf(S{1, 2}, S{2, 3}, "error message %s", "formatted") => false

func (a *Assertions) EqualValues(expected interface{}, actual interface{}, msgAndArgs ...interface{}) bool

EqualValues asserts that two objects are equal or convertible to the larger type and equal.

a.EqualValues(uint32(123), int32(123))

func (a *Assertions) EqualValuesf(expected interface{}, actual interface{}, msg string, args ...interface{}) bool

EqualValuesf asserts that two objects are equal or convertible to the larger type and equal.

a.EqualValuesf(uint32(123), int32(123), "error message %s", "formatted")

func (a *Assertions) Equalf(expected interface{}, actual interface{}, msg string, args ...interface{}) bool

Equalf asserts that two objects are equal.

a.Equalf(123, 123, "error message %s", "formatted")

Pointer variable equality is determined based on the equality of the referenced values (as opposed to the memory addresses). Function equality cannot be determined and will always fail.

func (a *Assertions) Error(err error, msgAndArgs ...interface{}) bool

Error asserts that a function returned an error (i.e. not `nil`).

actualObj, err := SomeFunction()
a.Error(err)

func (a *Assertions) ErrorAs(err error, target interface{}, msgAndArgs ...interface{}) bool

ErrorAs asserts that at least one of the errors in err's chain matches target, and if so, sets target to that error value. This is a wrapper for errors.As.

func (a *Assertions) ErrorAsf(err error, target interface{}, msg string, args ...interface{}) bool

ErrorAsf asserts that at least one of the errors in err's chain matches target, and if so, sets target to that error value. This is a wrapper for errors.As.

func (a *Assertions) ErrorContains(theError error, contains string, msgAndArgs ...interface{}) bool

ErrorContains asserts that a function returned an error (i.e. not `nil`) and that the error contains the specified substring.

actualObj, err := SomeFunction()
a.ErrorContains(err,  expectedErrorSubString)

ErrorContainsf asserts that a function returned an error (i.e. not `nil`) and that the error contains the specified substring.

actualObj, err := SomeFunction()
a.ErrorContainsf(err,  expectedErrorSubString, "error message %s", "formatted")

func (a *Assertions) ErrorIs(err error, target error, msgAndArgs ...interface{}) bool

ErrorIs asserts that at least one of the errors in err's chain matches target. This is a wrapper for errors.Is.

ErrorIsf asserts that at least one of the errors in err's chain matches target. This is a wrapper for errors.Is.

Errorf asserts that a function returned an error (i.e. not `nil`).

actualObj, err := SomeFunction()
a.Errorf(err, "error message %s", "formatted")

Eventually asserts that given condition will be met in waitFor time, periodically checking target function each tick.

a.Eventually(func() bool { return true; }, time.Second, 10*time.Millisecond)

externalValue := false
go func() {
	time.Sleep(8*time.Second)
	externalValue = true
}()
a.EventuallyWithT(func(c *assert.CollectT) {
	// add assertions as needed; any assertion failure will fail the current tick
	assert.True(c, externalValue, "expected 'externalValue' to be true")
}, 10*time.Second, 1*time.Second, "external state has not changed to 'true'; still false")

externalValue := false
go func() {
	time.Sleep(8*time.Second)
	externalValue = true
}()
a.EventuallyWithTf(func(c *assert.CollectT, "error message %s", "formatted") {
	// add assertions as needed; any assertion failure will fail the current tick
	assert.True(c, externalValue, "expected 'externalValue' to be true")
}, 10*time.Second, 1*time.Second, "external state has not changed to 'true'; still false")

Eventuallyf asserts that given condition will be met in waitFor time, periodically checking target function each tick.

a.Eventuallyf(func() bool { return true; }, time.Second, 10*time.Millisecond, "error message %s", "formatted")

func (a *Assertions) Exactly(expected interface{}, actual interface{}, msgAndArgs ...interface{}) bool

Exactly asserts that two objects are equal in value and type.

a.Exactly(int32(123), int64(123))

func (a *Assertions) Exactlyf(expected interface{}, actual interface{}, msg string, args ...interface{}) bool

Exactlyf asserts that two objects are equal in value and type.

a.Exactlyf(int32(123), int64(123), "error message %s", "formatted")

func (a *Assertions) Fail(failureMessage string, msgAndArgs ...interface{}) bool

Fail reports a failure through

func (a *Assertions) FailNow(failureMessage string, msgAndArgs ...interface{}) bool

FailNow fails test

Failf reports a failure through

func (a *Assertions) False(value bool, msgAndArgs ...interface{}) bool

False asserts that the specified value is false.

a.False(myBool)

Falsef asserts that the specified value is false.

a.Falsef(myBool, "error message %s", "formatted")

func (a *Assertions) FileExists(path string, msgAndArgs ...interface{}) bool

FileExists checks whether a file exists in the given path. It also fails if the path points to a directory or there is an error when trying to check the file.

FileExistsf checks whether a file exists in the given path. It also fails if the path points to a directory or there is an error when trying to check the file.

func (a *Assertions) Greater(e1 interface{}, e2 interface{}, msgAndArgs ...interface{}) bool

Greater asserts that the first element is greater than the second

a.Greater(2, 1)
a.Greater(float64(2), float64(1))
a.Greater("b", "a")

func (a *Assertions) GreaterOrEqual(e1 interface{}, e2 interface{}, msgAndArgs ...interface{}) bool

GreaterOrEqual asserts that the first element is greater than or equal to the second

a.GreaterOrEqual(2, 1)
a.GreaterOrEqual(2, 2)
a.GreaterOrEqual("b", "a")
a.GreaterOrEqual("b", "b")

func (a *Assertions) GreaterOrEqualf(e1 interface{}, e2 interface{}, msg string, args ...interface{}) bool

GreaterOrEqualf asserts that the first element is greater than or equal to the second

a.GreaterOrEqualf(2, 1, "error message %s", "formatted")
a.GreaterOrEqualf(2, 2, "error message %s", "formatted")
a.GreaterOrEqualf("b", "a", "error message %s", "formatted")
a.GreaterOrEqualf("b", "b", "error message %s", "formatted")

func (a *Assertions) Greaterf(e1 interface{}, e2 interface{}, msg string, args ...interface{}) bool

Greaterf asserts that the first element is greater than the second

a.Greaterf(2, 1, "error message %s", "formatted")
a.Greaterf(float64(2), float64(1), "error message %s", "formatted")
a.Greaterf("b", "a", "error message %s", "formatted")

func (*Assertions) HTTPBodyContains ¶

HTTPBodyContains asserts that a specified handler returns a body that contains a string.

a.HTTPBodyContains(myHandler, "GET", "www.google.com", nil, "I'm Feeling Lucky")

Returns whether the assertion was successful (true) or not (false).

func (*Assertions) HTTPBodyContainsf ¶ added in v1.2.0

HTTPBodyContainsf asserts that a specified handler returns a body that contains a string.

a.HTTPBodyContainsf(myHandler, "GET", "www.google.com", nil, "I'm Feeling Lucky", "error message %s", "formatted")

Returns whether the assertion was successful (true) or not (false).

func (*Assertions) HTTPBodyNotContains ¶

HTTPBodyNotContains asserts that a specified handler returns a body that does not contain a string.

a.HTTPBodyNotContains(myHandler, "GET", "www.google.com", nil, "I'm Feeling Lucky")

Returns whether the assertion was successful (true) or not (false).

func (*Assertions) HTTPBodyNotContainsf ¶ added in v1.2.0

HTTPBodyNotContainsf asserts that a specified handler returns a body that does not contain a string.

a.HTTPBodyNotContainsf(myHandler, "GET", "www.google.com", nil, "I'm Feeling Lucky", "error message %s", "formatted")

Returns whether the assertion was successful (true) or not (false).

HTTPError asserts that a specified handler returns an error status code.

a.HTTPError(myHandler, "POST", "/a/b/c", url.Values{"a": []string{"b", "c"}}

Returns whether the assertion was successful (true) or not (false).

HTTPErrorf asserts that a specified handler returns an error status code.

a.HTTPErrorf(myHandler, "POST", "/a/b/c", url.Values{"a": []string{"b", "c"}}

Returns whether the assertion was successful (true) or not (false).

HTTPRedirect asserts that a specified handler returns a redirect status code.

a.HTTPRedirect(myHandler, "GET", "/a/b/c", url.Values{"a": []string{"b", "c"}}

Returns whether the assertion was successful (true) or not (false).

HTTPRedirectf asserts that a specified handler returns a redirect status code.

a.HTTPRedirectf(myHandler, "GET", "/a/b/c", url.Values{"a": []string{"b", "c"}}

Returns whether the assertion was successful (true) or not (false).

HTTPStatusCode asserts that a specified handler returns a specified status code.

a.HTTPStatusCode(myHandler, "GET", "/notImplemented", nil, 501)

Returns whether the assertion was successful (true) or not (false).

HTTPStatusCodef asserts that a specified handler returns a specified status code.

a.HTTPStatusCodef(myHandler, "GET", "/notImplemented", nil, 501, "error message %s", "formatted")

Returns whether the assertion was successful (true) or not (false).

HTTPSuccess asserts that a specified handler returns a success status code.

a.HTTPSuccess(myHandler, "POST", "http://www.google.com", nil)

Returns whether the assertion was successful (true) or not (false).

HTTPSuccessf asserts that a specified handler returns a success status code.

a.HTTPSuccessf(myHandler, "POST", "http://www.google.com", nil, "error message %s", "formatted")

Returns whether the assertion was successful (true) or not (false).

func (a *Assertions) Implements(interfaceObject interface{}, object interface{}, msgAndArgs ...interface{}) bool

Implements asserts that an object is implemented by the specified interface.

a.Implements((*MyInterface)(nil), new(MyObject))

func (a *Assertions) Implementsf(interfaceObject interface{}, object interface{}, msg string, args ...interface{}) bool

Implementsf asserts that an object is implemented by the specified interface.

a.Implementsf((*MyInterface)(nil), new(MyObject), "error message %s", "formatted")

func (a *Assertions) InDelta(expected interface{}, actual interface{}, delta float64, msgAndArgs ...interface{}) bool

InDelta asserts that the two numerals are within delta of each other.

a.InDelta(math.Pi, 22/7.0, 0.01)

func (a *Assertions) InDeltaMapValues(expected interface{}, actual interface{}, delta float64, msgAndArgs ...interface{}) bool

InDeltaMapValues is the same as InDelta, but it compares all values between two maps. Both maps must have exactly the same keys.

func (a *Assertions) InDeltaMapValuesf(expected interface{}, actual interface{}, delta float64, msg string, args ...interface{}) bool

InDeltaMapValuesf is the same as InDelta, but it compares all values between two maps. Both maps must have exactly the same keys.

func (a *Assertions) InDeltaSlice(expected interface{}, actual interface{}, delta float64, msgAndArgs ...interface{}) bool

InDeltaSlice is the same as InDelta, except it compares two slices.

func (a *Assertions) InDeltaSlicef(expected interface{}, actual interface{}, delta float64, msg string, args ...interface{}) bool

InDeltaSlicef is the same as InDelta, except it compares two slices.

func (a *Assertions) InDeltaf(expected interface{}, actual interface{}, delta float64, msg string, args ...interface{}) bool

InDeltaf asserts that the two numerals are within delta of each other.

a.InDeltaf(math.Pi, 22/7.0, 0.01, "error message %s", "formatted")

func (a *Assertions) InEpsilon(expected interface{}, actual interface{}, epsilon float64, msgAndArgs ...interface{}) bool

InEpsilon asserts that expected and actual have a relative error less than epsilon

func (a *Assertions) InEpsilonSlice(expected interface{}, actual interface{}, epsilon float64, msgAndArgs ...interface{}) bool

InEpsilonSlice is the same as InEpsilon, except it compares each value from two slices.

func (a *Assertions) InEpsilonSlicef(expected interface{}, actual interface{}, epsilon float64, msg string, args ...interface{}) bool

InEpsilonSlicef is the same as InEpsilon, except it compares each value from two slices.

func (a *Assertions) InEpsilonf(expected interface{}, actual interface{}, epsilon float64, msg string, args ...interface{}) bool

InEpsilonf asserts that expected and actual have a relative error less than epsilon

func (a *Assertions) IsDecreasing(object interface{}, msgAndArgs ...interface{}) bool

IsDecreasing asserts that the collection is decreasing

a.IsDecreasing([]int{2, 1, 0})
a.IsDecreasing([]float{2, 1})
a.IsDecreasing([]string{"b", "a"})

func (a *Assertions) IsDecreasingf(object interface{}, msg string, args ...interface{}) bool

IsDecreasingf asserts that the collection is decreasing

a.IsDecreasingf([]int{2, 1, 0}, "error message %s", "formatted")
a.IsDecreasingf([]float{2, 1}, "error message %s", "formatted")
a.IsDecreasingf([]string{"b", "a"}, "error message %s", "formatted")

func (a *Assertions) IsIncreasing(object interface{}, msgAndArgs ...interface{}) bool

IsIncreasing asserts that the collection is increasing

a.IsIncreasing([]int{1, 2, 3})
a.IsIncreasing([]float{1, 2})
a.IsIncreasing([]string{"a", "b"})

func (a *Assertions) IsIncreasingf(object interface{}, msg string, args ...interface{}) bool

IsIncreasingf asserts that the collection is increasing

a.IsIncreasingf([]int{1, 2, 3}, "error message %s", "formatted")
a.IsIncreasingf([]float{1, 2}, "error message %s", "formatted")
a.IsIncreasingf([]string{"a", "b"}, "error message %s", "formatted")

func (a *Assertions) IsNonDecreasing(object interface{}, msgAndArgs ...interface{}) bool

IsNonDecreasing asserts that the collection is not decreasing

a.IsNonDecreasing([]int{1, 1, 2})
a.IsNonDecreasing([]float{1, 2})
a.IsNonDecreasing([]string{"a", "b"})

func (a *Assertions) IsNonDecreasingf(object interface{}, msg string, args ...interface{}) bool

IsNonDecreasingf asserts that the collection is not decreasing

a.IsNonDecreasingf([]int{1, 1, 2}, "error message %s", "formatted")
a.IsNonDecreasingf([]float{1, 2}, "error message %s", "formatted")
a.IsNonDecreasingf([]string{"a", "b"}, "error message %s", "formatted")

func (a *Assertions) IsNonIncreasing(object interface{}, msgAndArgs ...interface{}) bool

IsNonIncreasing asserts that the collection is not increasing

a.IsNonIncreasing([]int{2, 1, 1})
a.IsNonIncreasing([]float{2, 1})
a.IsNonIncreasing([]string{"b", "a"})

func (a *Assertions) IsNonIncreasingf(object interface{}, msg string, args ...interface{}) bool

IsNonIncreasingf asserts that the collection is not increasing

a.IsNonIncreasingf([]int{2, 1, 1}, "error message %s", "formatted")
a.IsNonIncreasingf([]float{2, 1}, "error message %s", "formatted")
a.IsNonIncreasingf([]string{"b", "a"}, "error message %s", "formatted")

func (a *Assertions) IsNotType(theType interface{}, object interface{}, msgAndArgs ...interface{}) bool

IsNotType asserts that the specified objects are not of the same type.

a.IsNotType(&NotMyStruct{}, &MyStruct{})

func (a *Assertions) IsNotTypef(theType interface{}, object interface{}, msg string, args ...interface{}) bool

IsNotTypef asserts that the specified objects are not of the same type.

a.IsNotTypef(&NotMyStruct{}, &MyStruct{}, "error message %s", "formatted")

func (a *Assertions) IsType(expectedType interface{}, object interface{}, msgAndArgs ...interface{}) bool

IsType asserts that the specified objects are of the same type.

a.IsType(&MyStruct{}, &MyStruct{})

func (a *Assertions) IsTypef(expectedType interface{}, object interface{}, msg string, args ...interface{}) bool

IsTypef asserts that the specified objects are of the same type.

a.IsTypef(&MyStruct{}, &MyStruct{}, "error message %s", "formatted")

JSONEq asserts that two JSON strings are equivalent.

a.JSONEq(`{"hello": "world", "foo": "bar"}`, `{"foo": "bar", "hello": "world"}`)

JSONEqf asserts that two JSON strings are equivalent.

a.JSONEqf(`{"hello": "world", "foo": "bar"}`, `{"foo": "bar", "hello": "world"}`, "error message %s", "formatted")

func (a *Assertions) Len(object interface{}, length int, msgAndArgs ...interface{}) bool

Len asserts that the specified object has specific length. Len also fails if the object has a type that len() not accept.

a.Len(mySlice, 3)

func (a *Assertions) Lenf(object interface{}, length int, msg string, args ...interface{}) bool

Lenf asserts that the specified object has specific length. Lenf also fails if the object has a type that len() not accept.

a.Lenf(mySlice, 3, "error message %s", "formatted")

func (a *Assertions) Less(e1 interface{}, e2 interface{}, msgAndArgs ...interface{}) bool

Less asserts that the first element is less than the second

a.Less(1, 2)
a.Less(float64(1), float64(2))
a.Less("a", "b")

func (a *Assertions) LessOrEqual(e1 interface{}, e2 interface{}, msgAndArgs ...interface{}) bool

LessOrEqual asserts that the first element is less than or equal to the second

a.LessOrEqual(1, 2)
a.LessOrEqual(2, 2)
a.LessOrEqual("a", "b")
a.LessOrEqual("b", "b")

func (a *Assertions) LessOrEqualf(e1 interface{}, e2 interface{}, msg string, args ...interface{}) bool

LessOrEqualf asserts that the first element is less than or equal to the second

a.LessOrEqualf(1, 2, "error message %s", "formatted")
a.LessOrEqualf(2, 2, "error message %s", "formatted")
a.LessOrEqualf("a", "b", "error message %s", "formatted")
a.LessOrEqualf("b", "b", "error message %s", "formatted")

func (a *Assertions) Lessf(e1 interface{}, e2 interface{}, msg string, args ...interface{}) bool

Lessf asserts that the first element is less than the second

a.Lessf(1, 2, "error message %s", "formatted")
a.Lessf(float64(1), float64(2), "error message %s", "formatted")
a.Lessf("a", "b", "error message %s", "formatted")

func (a *Assertions) Negative(e interface{}, msgAndArgs ...interface{}) bool

Negative asserts that the specified element is negative

a.Negative(-1)
a.Negative(-1.23)

func (a *Assertions) Negativef(e interface{}, msg string, args ...interface{}) bool

Negativef asserts that the specified element is negative

a.Negativef(-1, "error message %s", "formatted")
a.Negativef(-1.23, "error message %s", "formatted")

Never asserts that the given condition doesn't satisfy in waitFor time, periodically checking the target function each tick.

a.Never(func() bool { return false; }, time.Second, 10*time.Millisecond)

Neverf asserts that the given condition doesn't satisfy in waitFor time, periodically checking the target function each tick.

a.Neverf(func() bool { return false; }, time.Second, 10*time.Millisecond, "error message %s", "formatted")

func (a *Assertions) Nil(object interface{}, msgAndArgs ...interface{}) bool

Nil asserts that the specified object is nil.

a.Nil(err)

func (a *Assertions) Nilf(object interface{}, msg string, args ...interface{}) bool

Nilf asserts that the specified object is nil.

a.Nilf(err, "error message %s", "formatted")

func (a *Assertions) NoDirExists(path string, msgAndArgs ...interface{}) bool

NoDirExists checks whether a directory does not exist in the given path. It fails if the path points to an existing _directory_ only.

NoDirExistsf checks whether a directory does not exist in the given path. It fails if the path points to an existing _directory_ only.

func (a *Assertions) NoError(err error, msgAndArgs ...interface{}) bool

NoError asserts that a function returned no error (i.e. `nil`).

  actualObj, err := SomeFunction()
  if a.NoError(err) {
	   assert.Equal(t, expectedObj, actualObj)
  }

NoErrorf asserts that a function returned no error (i.e. `nil`).

  actualObj, err := SomeFunction()
  if a.NoErrorf(err, "error message %s", "formatted") {
	   assert.Equal(t, expectedObj, actualObj)
  }

func (a *Assertions) NoFileExists(path string, msgAndArgs ...interface{}) bool

NoFileExists checks whether a file does not exist in a given path. It fails if the path points to an existing _file_ only.

NoFileExistsf checks whether a file does not exist in a given path. It fails if the path points to an existing _file_ only.

func (a *Assertions) NotContains(s interface{}, contains interface{}, msgAndArgs ...interface{}) bool

NotContains asserts that the specified string, list(array, slice...) or map does NOT contain the specified substring or element.

a.NotContains("Hello World", "Earth")
a.NotContains(["Hello", "World"], "Earth")
a.NotContains({"Hello": "World"}, "Earth")

func (a *Assertions) NotContainsf(s interface{}, contains interface{}, msg string, args ...interface{}) bool

NotContainsf asserts that the specified string, list(array, slice...) or map does NOT contain the specified substring or element.

a.NotContainsf("Hello World", "Earth", "error message %s", "formatted")
a.NotContainsf(["Hello", "World"], "Earth", "error message %s", "formatted")
a.NotContainsf({"Hello": "World"}, "Earth", "error message %s", "formatted")

func (a *Assertions) NotElementsMatch(listA interface{}, listB interface{}, msgAndArgs ...interface{}) bool

a.NotElementsMatch([1, 1, 2, 3], [1, 1, 2, 3]) -> false

a.NotElementsMatch([1, 1, 2, 3], [1, 2, 3]) -> true

a.NotElementsMatch([1, 2, 3], [1, 2, 4]) -> true

func (a *Assertions) NotElementsMatchf(listA interface{}, listB interface{}, msg string, args ...interface{}) bool

a.NotElementsMatchf([1, 1, 2, 3], [1, 1, 2, 3], "error message %s", "formatted") -> false

a.NotElementsMatchf([1, 1, 2, 3], [1, 2, 3], "error message %s", "formatted") -> true

a.NotElementsMatchf([1, 2, 3], [1, 2, 4], "error message %s", "formatted") -> true

func (a *Assertions) NotEmpty(object interface{}, msgAndArgs ...interface{}) bool

NotEmpty asserts that the specified object is NOT Empty.

if a.NotEmpty(obj) {
  assert.Equal(t, "two", obj[1])
}

func (a *Assertions) NotEmptyf(object interface{}, msg string, args ...interface{}) bool

NotEmptyf asserts that the specified object is NOT Empty.

if a.NotEmptyf(obj, "error message %s", "formatted") {
  assert.Equal(t, "two", obj[1])
}

func (a *Assertions) NotEqual(expected interface{}, actual interface{}, msgAndArgs ...interface{}) bool

NotEqual asserts that the specified values are NOT equal.

a.NotEqual(obj1, obj2)

Pointer variable equality is determined based on the equality of the referenced values (as opposed to the memory addresses).

func (a *Assertions) NotEqualValues(expected interface{}, actual interface{}, msgAndArgs ...interface{}) bool

NotEqualValues asserts that two objects are not equal even when converted to the same type

a.NotEqualValues(obj1, obj2)

func (a *Assertions) NotEqualValuesf(expected interface{}, actual interface{}, msg string, args ...interface{}) bool

NotEqualValuesf asserts that two objects are not equal even when converted to the same type

a.NotEqualValuesf(obj1, obj2, "error message %s", "formatted")

func (a *Assertions) NotEqualf(expected interface{}, actual interface{}, msg string, args ...interface{}) bool

NotEqualf asserts that the specified values are NOT equal.

a.NotEqualf(obj1, obj2, "error message %s", "formatted")

Pointer variable equality is determined based on the equality of the referenced values (as opposed to the memory addresses).

func (a *Assertions) NotErrorAs(err error, target interface{}, msgAndArgs ...interface{}) bool

NotErrorAs asserts that none of the errors in err's chain matches target, but if so, sets target to that error value.

func (a *Assertions) NotErrorAsf(err error, target interface{}, msg string, args ...interface{}) bool

NotErrorAsf asserts that none of the errors in err's chain matches target, but if so, sets target to that error value.

func (a *Assertions) NotErrorIs(err error, target error, msgAndArgs ...interface{}) bool

NotErrorIs asserts that none of the errors in err's chain matches target. This is a wrapper for errors.Is.

NotErrorIsf asserts that none of the errors in err's chain matches target. This is a wrapper for errors.Is.

func (a *Assertions) NotImplements(interfaceObject interface{}, object interface{}, msgAndArgs ...interface{}) bool

NotImplements asserts that an object does not implement the specified interface.

a.NotImplements((*MyInterface)(nil), new(MyObject))

func (a *Assertions) NotImplementsf(interfaceObject interface{}, object interface{}, msg string, args ...interface{}) bool

NotImplementsf asserts that an object does not implement the specified interface.

a.NotImplementsf((*MyInterface)(nil), new(MyObject), "error message %s", "formatted")

func (a *Assertions) NotNil(object interface{}, msgAndArgs ...interface{}) bool

NotNil asserts that the specified object is not nil.

a.NotNil(err)

func (a *Assertions) NotNilf(object interface{}, msg string, args ...interface{}) bool

NotNilf asserts that the specified object is not nil.

a.NotNilf(err, "error message %s", "formatted")

func (a *Assertions) NotPanics(f PanicTestFunc, msgAndArgs ...interface{}) bool

NotPanics asserts that the code inside the specified PanicTestFunc does NOT panic.

a.NotPanics(func(){ RemainCalm() })

func (a *Assertions) NotPanicsf(f PanicTestFunc, msg string, args ...interface{}) bool

NotPanicsf asserts that the code inside the specified PanicTestFunc does NOT panic.

a.NotPanicsf(func(){ RemainCalm() }, "error message %s", "formatted")

func (a *Assertions) NotRegexp(rx interface{}, str interface{}, msgAndArgs ...interface{}) bool

NotRegexp asserts that a specified regexp does not match a string.

a.NotRegexp(regexp.MustCompile("starts"), "it's starting")
a.NotRegexp("^start", "it's not starting")

func (a *Assertions) NotRegexpf(rx interface{}, str interface{}, msg string, args ...interface{}) bool

NotRegexpf asserts that a specified regexp does not match a string.

a.NotRegexpf(regexp.MustCompile("starts"), "it's starting", "error message %s", "formatted")
a.NotRegexpf("^start", "it's not starting", "error message %s", "formatted")

func (a *Assertions) NotSame(expected interface{}, actual interface{}, msgAndArgs ...interface{}) bool

NotSame asserts that two pointers do not reference the same object.

a.NotSame(ptr1, ptr2)

Both arguments must be pointer variables. Pointer variable sameness is determined based on the equality of both type and value.

func (a *Assertions) NotSamef(expected interface{}, actual interface{}, msg string, args ...interface{}) bool

NotSamef asserts that two pointers do not reference the same object.

a.NotSamef(ptr1, ptr2, "error message %s", "formatted")

Both arguments must be pointer variables. Pointer variable sameness is determined based on the equality of both type and value.

func (a *Assertions) NotSubset(list interface{}, subset interface{}, msgAndArgs ...interface{}) bool

a.NotSubset([1, 3, 4], [1, 2])
a.NotSubset({"x": 1, "y": 2}, {"z": 3})
a.NotSubset([1, 3, 4], {1: "one", 2: "two"})
a.NotSubset({"x": 1, "y": 2}, ["z"])

func (a *Assertions) NotSubsetf(list interface{}, subset interface{}, msg string, args ...interface{}) bool

a.NotSubsetf([1, 3, 4], [1, 2], "error message %s", "formatted")
a.NotSubsetf({"x": 1, "y": 2}, {"z": 3}, "error message %s", "formatted")
a.NotSubsetf([1, 3, 4], {1: "one", 2: "two"}, "error message %s", "formatted")
a.NotSubsetf({"x": 1, "y": 2}, ["z"], "error message %s", "formatted")

func (a *Assertions) NotZero(i interface{}, msgAndArgs ...interface{}) bool

NotZero asserts that i is not the zero value for its type.

func (a *Assertions) NotZerof(i interface{}, msg string, args ...interface{}) bool

NotZerof asserts that i is not the zero value for its type.

func (a *Assertions) Panics(f PanicTestFunc, msgAndArgs ...interface{}) bool

Panics asserts that the code inside the specified PanicTestFunc panics.

a.Panics(func(){ GoCrazy() })

func (a *Assertions) PanicsWithError(errString string, f PanicTestFunc, msgAndArgs ...interface{}) bool

PanicsWithError asserts that the code inside the specified PanicTestFunc panics, and that the recovered panic value is an error that satisfies the EqualError comparison.

a.PanicsWithError("crazy error", func(){ GoCrazy() })

PanicsWithErrorf asserts that the code inside the specified PanicTestFunc panics, and that the recovered panic value is an error that satisfies the EqualError comparison.

a.PanicsWithErrorf("crazy error", func(){ GoCrazy() }, "error message %s", "formatted")

func (a *Assertions) PanicsWithValue(expected interface{}, f PanicTestFunc, msgAndArgs ...interface{}) bool

PanicsWithValue asserts that the code inside the specified PanicTestFunc panics, and that the recovered panic value equals the expected panic value.

a.PanicsWithValue("crazy error", func(){ GoCrazy() })

func (a *Assertions) PanicsWithValuef(expected interface{}, f PanicTestFunc, msg string, args ...interface{}) bool

PanicsWithValuef asserts that the code inside the specified PanicTestFunc panics, and that the recovered panic value equals the expected panic value.

a.PanicsWithValuef("crazy error", func(){ GoCrazy() }, "error message %s", "formatted")

Panicsf asserts that the code inside the specified PanicTestFunc panics.

a.Panicsf(func(){ GoCrazy() }, "error message %s", "formatted")

func (a *Assertions) Positive(e interface{}, msgAndArgs ...interface{}) bool

Positive asserts that the specified element is positive

a.Positive(1)
a.Positive(1.23)

func (a *Assertions) Positivef(e interface{}, msg string, args ...interface{}) bool

Positivef asserts that the specified element is positive

a.Positivef(1, "error message %s", "formatted")
a.Positivef(1.23, "error message %s", "formatted")

func (a *Assertions) Regexp(rx interface{}, str interface{}, msgAndArgs ...interface{}) bool

Regexp asserts that a specified regexp matches a string.

a.Regexp(regexp.MustCompile("start"), "it's starting")
a.Regexp("start...$", "it's not starting")

func (a *Assertions) Regexpf(rx interface{}, str interface{}, msg string, args ...interface{}) bool

Regexpf asserts that a specified regexp matches a string.

a.Regexpf(regexp.MustCompile("start"), "it's starting", "error message %s", "formatted")
a.Regexpf("start...$", "it's not starting", "error message %s", "formatted")

func (a *Assertions) Same(expected interface{}, actual interface{}, msgAndArgs ...interface{}) bool

Same asserts that two pointers reference the same object.

a.Same(ptr1, ptr2)

Both arguments must be pointer variables. Pointer variable sameness is determined based on the equality of both type and value.

func (a *Assertions) Samef(expected interface{}, actual interface{}, msg string, args ...interface{}) bool

Samef asserts that two pointers reference the same object.

a.Samef(ptr1, ptr2, "error message %s", "formatted")

Both arguments must be pointer variables. Pointer variable sameness is determined based on the equality of both type and value.

func (a *Assertions) Subset(list interface{}, subset interface{}, msgAndArgs ...interface{}) bool

a.Subset([1, 2, 3], [1, 2])
a.Subset({"x": 1, "y": 2}, {"x": 1})
a.Subset([1, 2, 3], {1: "one", 2: "two"})
a.Subset({"x": 1, "y": 2}, ["x"])

func (a *Assertions) Subsetf(list interface{}, subset interface{}, msg string, args ...interface{}) bool

a.Subsetf([1, 2, 3], [1, 2], "error message %s", "formatted")
a.Subsetf({"x": 1, "y": 2}, {"x": 1}, "error message %s", "formatted")
a.Subsetf([1, 2, 3], {1: "one", 2: "two"}, "error message %s", "formatted")
a.Subsetf({"x": 1, "y": 2}, ["x"], "error message %s", "formatted")

func (a *Assertions) True(value bool, msgAndArgs ...interface{}) bool

True asserts that the specified value is true.

a.True(myBool)

Truef asserts that the specified value is true.

a.Truef(myBool, "error message %s", "formatted")

WithinDuration asserts that the two times are within duration delta of each other.

a.WithinDuration(time.Now(), time.Now(), 10*time.Second)

WithinDurationf asserts that the two times are within duration delta of each other.

a.WithinDurationf(time.Now(), time.Now(), 10*time.Second, "error message %s", "formatted")

WithinRange asserts that a time is within a time range (inclusive).

a.WithinRange(time.Now(), time.Now().Add(-time.Second), time.Now().Add(time.Second))

WithinRangef asserts that a time is within a time range (inclusive).

a.WithinRangef(time.Now(), time.Now().Add(-time.Second), time.Now().Add(time.Second), "error message %s", "formatted")

YAMLEq asserts that two YAML strings are equivalent.

YAMLEqf asserts that two YAML strings are equivalent.

func (a *Assertions) Zero(i interface{}, msgAndArgs ...interface{}) bool

Zero asserts that i is the zero value for its type.

func (a *Assertions) Zerof(i interface{}, msg string, args ...interface{}) bool

Zerof asserts that i is the zero value for its type.

type BoolAssertionFunc func(TestingT, bool, ...interface{}) bool

BoolAssertionFunc is a common function prototype when validating a bool value. Can be useful for table driven tests.

t := &testing.T{} // provided by test

isOkay := func(x int) bool {
	return x >= 42
}

tests := []struct {
	name      string
	arg       int
	assertion BoolAssertionFunc
}{
	{"-1 is bad", -1, False},
	{"42 is good", 42, True},
	{"41 is bad", 41, False},
	{"45 is cool", 45, True},
}

for _, tt := range tests {
	t.Run(tt.name, func(t *testing.T) {
		tt.assertion(t, isOkay(tt.arg))
	})
}

CollectT implements the TestingT interface and collects all errors.

func (*CollectT) Copy(TestingT)

Deprecated: That was a method for internal usage that should not have been published. Now just panics.

func (c *CollectT) Errorf(format string, args ...interface{})

Errorf collects the error.

func (c *CollectT) FailNow()

FailNow stops execution by calling runtime.Goexit.

Deprecated: That was a method for internal usage that should not have been published. Now just panics.

type CompareType = compareResult

Deprecated: CompareType has only ever been for internal use and has accidentally been published since v1.6.0. Do not use it.

type Comparison func() (success bool)

Comparison is a custom function that returns true on success and false on failure

type ComparisonAssertionFunc func(TestingT, interface{}, interface{}, ...interface{}) bool

ComparisonAssertionFunc is a common function prototype when comparing two values. Can be useful for table driven tests.

t := &testing.T{} // provided by test

adder := func(x, y int) int {
	return x + y
}

type args struct {
	x int
	y int
}

tests := []struct {
	name      string
	args      args
	expect    int
	assertion ComparisonAssertionFunc
}{
	{"2+2=4", args{2, 2}, 4, Equal},
	{"2+2!=5", args{2, 2}, 5, NotEqual},
	{"2+3==5", args{2, 3}, 5, Exactly},
}

for _, tt := range tests {
	t.Run(tt.name, func(t *testing.T) {
		tt.assertion(t, tt.expect, adder(tt.args.x, tt.args.y))
	})
}

type ErrorAssertionFunc func(TestingT, error, ...interface{}) bool

ErrorAssertionFunc is a common function prototype when validating an error value. Can be useful for table driven tests.

t := &testing.T{} // provided by test

dumbParseNum := func(input string, v interface{}) error {
	return json.Unmarshal([]byte(input), v)
}

tests := []struct {
	name      string
	arg       string
	assertion ErrorAssertionFunc
}{
	{"1.2 is number", "1.2", NoError},
	{"1.2.3 not number", "1.2.3", Error},
	{"true is not number", "true", Error},
	{"3 is number", "3", NoError},
}

for _, tt := range tests {
	t.Run(tt.name, func(t *testing.T) {
		var x float64
		tt.assertion(t, dumbParseNum(tt.arg, &x))
	})
}

type PanicAssertionFunc = func(t TestingT, f PanicTestFunc, msgAndArgs ...interface{}) bool

PanicAssertionFunc is a common function prototype when validating a panic value. Can be useful for table driven tests.

t := &testing.T{} // provided by test

tests := []struct {
	name      string
	panicFn   PanicTestFunc
	assertion PanicAssertionFunc
}{
	{"with panic", func() { panic(nil) }, Panics},
	{"without panic", func() {}, NotPanics},
}

for _, tt := range tests {
	t.Run(tt.name, func(t *testing.T) {
		tt.assertion(t, tt.panicFn)
	})
}

type PanicTestFunc func()

PanicTestFunc defines a func that should be passed to the assert.Panics and assert.NotPanics methods, and represents a simple func that takes no arguments, and returns nothing.

type TestingT interface {
	Errorf(format string, args ...interface{})
}

TestingT is an interface wrapper around *testing.T

type ValueAssertionFunc func(TestingT, interface{}, ...interface{}) bool

ValueAssertionFunc is a common function prototype when validating a single value. Can be useful for table driven tests.

t := &testing.T{} // provided by test

dumbParse := func(input string) interface{} {
	var x interface{}
	_ = json.Unmarshal([]byte(input), &x)
	return x
}

tests := []struct {
	name      string
	arg       string
	assertion ValueAssertionFunc
}{
	{"true is not nil", "true", NotNil},
	{"empty string is nil", "", Nil},
	{"zero is not nil", "0", NotNil},
	{"zero is zero", "0", Zero},
	{"false is zero", "false", Zero},
}

for _, tt := range tests {
	t.Run(tt.name, func(t *testing.T) {
		tt.assertion(t, dumbParse(tt.arg))
	})
}