const crypto = require('crypto');

const tls = require('tls');

const expected = [

'crypto.Credentials is deprecated. Use tls.SecureContext instead.',

'crypto.createCredentials is deprecated. Use tls.createSecureContext instead.'

];

process.on('warning', common.mustCall((warning) => {

assert.strictEqual(warning.name, 'DeprecationWarning');

assert.notStrictEqual(expected.indexOf(warning.message), -1,

`unexpected error message: "${warning.message}"`);

// Remove a warning message after it is seen so that we guarantee that we get

// each message only once.

expected.splice(expected.indexOf(warning.message), 1);

}, 2));

var expected = [

'crypto.Credentials is deprecated. Use tls.SecureContext instead.',

'crypto.createCredentials is deprecated. Use tls.createSecureContext instead.'

];

}, expected.length));

// Accessing the deprecated function is enough to trigger the warning event.

// It does not need to be called. So the assert serves the purpose of both