Test run shows pending tests

At the end of a npm run test, there says there is 6 pending tests.

~/develop/cloudevents/sdk-javascript(master) » ./node_modules/mocha/bin/mocha --require ts-node/register test/cloud_event_test.ts


  A CloudEvent
    ✓ Can be constructed with a typed Message
    ✓ serializes as JSON with toString()

  A 1.0 CloudEvent
    ✓ has retreivable source and type attributes
    ✓ defaults to specversion 1.0
    ✓ generates an ID if one is not provided in the constructor
    ✓ can be constructed with an ID
    ✓ generates a timestamp by default
    ✓ can be constructed with a timestamp
    ✓ can be constructed with a datacontenttype
    ✓ can be constructed with a dataschema
    ✓ can be constructed with a subject
    ✓ throws a TypeError when constructed with a schemaurl
    ✓ can be constructed with data
    ✓ can be constructed with extensions
    - throws ValidationError if the CloudEvent does not conform to the schema
    - returns a JSON string even if format is invalid
    - correctly formats a CloudEvent as JSON

  A 0.3 CloudEvent
    ✓ has retreivable source and type attributes
    ✓ generates an ID if one is not provided in the constructor
    ✓ generates a timestamp by default
    ✓ can be constructed with a timestamp
    ✓ can be constructed with a datacontenttype
    ✓ can be constructed with a datacontentencoding
    ✓ can be constructed with a schemaurl
    ✓ can be constructed with a subject
    ✓ throws a TypeError when constructed with a dataschema
    ✓ can be constructed with data
    - throws ValidationError if the CloudEvent does not conform to the schema
    - returns a JSON string even if format is invalid
    - correctly formats a CloudEvent as JSON


  24 passing (11ms)
  6 pending

There are 6 tests here, https://github.com/cloudevents/sdk-javascript/blob/master/test/cloud_event_test.ts#L104 that don't do anything.

Were these just place holders when doing the TS re-write and should be removed? or do they need to be implemented?