tree d04701b84deb31c5c7823967ec0051e66dc7b030
parent 1ae4033083ad1193afa27f3e689846c46805649d
author Adam Rice <ricea@chromium.org> 1543328202 +0900
committer GitHub <noreply@github.com> 1543328202 +0900
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ReadableStream: modify tests for pipeThrough() having a brand check (#14193)

Remove tests that ReadableStream.prototype.pipeThrough operates
generically on its arguments. Add tests that it performs brand checks on
|this|, |readable| and |writable|, and throws for other precondition
failures.

Also verify that it *doesn't* call pipeTo().

Also verify that preventClose, preventCancel and preventAbort work,
since we can no longer test that it passes through to pipeTo().

Also change the expected length of the function from 2 to 1 to reflect
that the options argument is optional.

Corresponding standard changes are at
https://github.com/whatwg/streams/pull/966.