Convert writable stream tests to web platform tests format

[domenic]

After #488 lands we should do this

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Update 2016-10-25: here is a remaining checklist of files, after #540 lands:

• bad-strategies.js
• bad-underlying-sinks.js (can go to existing to-upstream bad-underlying-sinks.js)
• brand-checks.js
• byte-length-queuing-strategy.js
• count-queuing-strategy.js

Updated 2016-11-07: #640 is taking care of the above.

[tyoshino]

I (and @ricea also maybe) are going to work on this.

What would the best work flow? Maybe, local review somewhere, and then PR to w3c/.

Creating PR to fork would be overkilling, right?

Just commit to personal forks and then get them reviewed before upstream PR?
tyoshino/web-platform-tests@4cc6bf2

[domenic]

Oh, very exciting! I think doing something similar to what we did for readable stream makes sense: use this repo as a staging ground and convert the tests here, then when we feel they're "done", move them to WPT in one PR. The benefit there is that we can continue to validate the tests against the reference implementation as we go.

[tyoshino]

OK. As we've removed the directory in 85260dc and is now used for checking out wpt from w3c repo, let me create a new directory dedicated for staging/reviewing.

[tyoshino]

Hmm, before 85260dc, we had to manually copy the streams test to a full checkout of w3c wpt so that the tests can use e.g. stuff in service-workers/resources? Sorry, I forgot that.

Now, to keep the converted wpt tests for writable streams in this repository, basically we need to have a separate directory. To allow the tests in it to use the files (service-workers/resources), we need to create a symlink (not good for Windows checkout?) or (partially) clone the repo. It's not something we want to do, I think.

[tyoshino]

Hmm, it's awkward, but negation entry in .gitignore would help. See #510.

[domenic]

Please leave the piping tests to me and I'll work on converting them as part of #512.

[tyoshino]

Please leave the piping tests to me and I'll work on converting them as part of #512.

Got it, domenic.

@ricea It's ready for converting more tests into wpt. If you're willing to take some of them, please share which items you're going to take here. Converted tests should be placed in the to-upstream-wpts/ directory.

[ricea]

I am porting the tests in test/writable-stream.js this week. The tests in test/writable-stream-abort.js are available if anyone wants to pick them up.

[marvinhagemeister]

@ricea Awesome, I'll have a go at writeable-stream-abort.js

[domenic]

I've updated the OP with a remaining checklist of files to move.