Re: [streams-tests] Streams: add some pipeThrough tests (#4572)

# Firefox (nightly channel) #
Testing web-platform-tests at revision b5ffc5a3495dba22d4ecc03b2267cb5d4c3d648e
Using browser at version BuildID 20170118211214; SourceStamp a5253dce8b67c2248d7b92ef664a6dd6664e7609
Starting 10 test iterations
All results were stable

## All results ##

<details>

<summary><a href="https://w3c-test.org/submissions/4572/streams/piping/pipe-through.https.html">/streams/piping/pipe-through.https.html</a></summary>


|                                                Subtest                                                 | Results |
|--------------------------------------------------------------------------------------------------------|---------|
|                                                                                                        | OK      |
| `pipeThrough generically calls pipeTo with the appropriate args`                                       | FAIL    |
| `Piping through a duck-typed pass-through transform stream should work`                                | FAIL    |
| `Piping through a transform errored on the writable end does not cause an unhandled promise rejection` | FAIL    |
| `pipeThrough can handle calling a pipeTo that returns a non-promise object`                            | FAIL    |

</details>


View on GitHub: https://github.com/w3c/web-platform-tests/pull/4572#issuecomment-273905370

Received on Friday, 20 January 2017 19:29:15 UTC