[streams] More pipeThrough tests (#396)

You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/streams/pull/396

-- Commit Summary --

  * brand-checks: add parameters to methodThrows
  * brand-checks: added pipeThrough error checks

-- File Changes --

    M reference-implementation/test/brand-checks.js (76)

-- Patch Links --

https://github.com/whatwg/streams/pull/396.patch
https://github.com/whatwg/streams/pull/396.diff

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https://github.com/whatwg/streams/pull/396