Update web-platform-tests to revision 44702f2bc8ea98bc32b5b244f2fe63c6ce66d49d

tests/wpt/web-platform-tests/streams/transform-streams/patched-global.js

@@ -0,0 +1,53 @@
+'use strict';
+
+// Tests which patch the global environment are kept separate to avoid interfering with other tests.
+
+if (self.importScripts) {
+  self.importScripts('/resources/testharness.js');
+}
+
+// eslint-disable-next-line no-extend-native, accessor-pairs
+Object.defineProperty(Object.prototype, 'highWaterMark', {
+  set() { throw new Error('highWaterMark setter called'); }
+});
+
+// eslint-disable-next-line no-extend-native, accessor-pairs
+Object.defineProperty(Object.prototype, 'size', {
+  set() { throw new Error('size setter called'); }
+});
+
+test(() => {
+  assert_not_equals(new TransformStream(), null, 'constructor should work');
+}, 'TransformStream constructor should not call setters for highWaterMark or size');
+
+test(t => {
+  /* eslint-disable no-native-reassign */
+
+  const oldReadableStream = ReadableStream;
+  const oldWritableStream = WritableStream;
+  const getReader = ReadableStream.prototype.getReader;
+  const getWriter = WritableStream.prototype.getWriter;
+
+  // Replace ReadableStream and WritableStream with broken versions.
+  ReadableStream = function () {
+    throw new Error('Called the global ReadableStream constructor');
+  };
+  WritableStream = function () {
+    throw new Error('Called the global WritableStream constructor');
+  };
+  t.add_cleanup(() => {
+    ReadableStream = oldReadableStream;
+    WritableStream = oldWritableStream;
+  });
+
+  const ts = new TransformStream();
+
+  // Just to be sure, ensure the readable and writable pass brand checks.
+  assert_not_equals(getReader.call(ts.readable), undefined,
+                    'getReader should work when called on ts.readable');
+  assert_not_equals(getWriter.call(ts.writable), undefined,
+                    'getWriter should work when called on ts.writable');
+  /* eslint-enable no-native-reassign */
+}, 'TransformStream should use the original value of ReadableStream and WritableStream');
+
+done();