Update web-platform-tests to revision eb6b0210d6f0b1b44bc74385de04a2291ce2575c

tests/wpt/web-platform-tests/streams/writable-streams/brand-checks.any.js

@@ -103,6 +103,11 @@ promise_test(t => {
                              [fakeWSDefaultWriter(), realWS(), realWSDefaultController(), undefined, null]);
 }, 'WritableStreamDefaultWriter.prototype.close enforces a brand check');
 
+test(() => {
+  methodThrowsForAll(WriterProto, 'releaseLock',
+                     [fakeWSDefaultWriter(), realWS(), realWSDefaultController(), undefined, null]);
+}, 'WritableStreamDefaultWriter.prototype.releaseLock enforces a brand check');
+
 test(() => {
   methodThrowsForAll(WritableStreamDefaultController.prototype, 'error',
                      [fakeWSDefaultController(), realWS(), realWSDefaultWriter(), undefined, null]);

tests/wpt/web-platform-tests/streams/writable-streams/close.any.js

@@ -399,3 +399,15 @@ promise_test(t => {
     });
   });
 }, 'close() should not reject until no sink methods are in flight');
+
+promise_test(() => {
+  const ws = new WritableStream();
+  const writer1 = ws.getWriter();
+  return writer1.close().then(() => {
+    writer1.releaseLock();
+    const writer2 = ws.getWriter();
+    const ready = writer2.ready;
+    assert_equals(ready.constructor, Promise);
+    return ready;
+  });
+}, 'ready promise should be initialised as fulfilled for a writer on a closed stream');

tests/wpt/web-platform-tests/streams/writable-streams/write.any.js

@@ -275,3 +275,10 @@ promise_test(t => {
     promise_rejects(t, error1, writer.write(), 'write() should be rejected')
   ]);
 }, 'write() on a stream with HWM 0 should not cause the ready Promise to resolve');
+
+promise_test(t => {
+  const ws = new WritableStream();
+  const writer = ws.getWriter();
+  writer.releaseLock();
+  return promise_rejects(t, new TypeError(), writer.write(), 'write should reject');
+}, 'writing to a released writer should reject the returned promise');