[streams] More tests to the suite (#391)

I translated some custom tests that we have at WebKit trunk. Some of them were tweaked for the latest changes regarding the promises fulfillment order, but they pass perfectly.
You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/streams/pull/391

-- Commit Summary --

  * Added some tests about behavior of ReadableStreamReader
  * Added ReadableStreamReader tests about errors
  * Added ReadableStream tests about garbage collection

-- File Changes --

    M reference-implementation/test/readable-stream-reader.js (171)
    M reference-implementation/test/readable-stream.js (50)

-- Patch Links --

https://github.com/whatwg/streams/pull/391.patch
https://github.com/whatwg/streams/pull/391.diff

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Reply to this email directly or view it on GitHub:
https://github.com/whatwg/streams/pull/391