1 files changed, 71 insertions, 0 deletions
diff --git a/testing/web-platform/tests/streams/readable-streams/garbage-collection.any.js b/testing/web-platform/tests/streams/readable-streams/garbage-collection.any.js
new file mode 100644
index 0000000000..13bd1fb343
--- /dev/null
+++ b/testing/web-platform/tests/streams/readable-streams/garbage-collection.any.js
@@ -0,0 +1,71 @@
+// META: global=window,worker,shadowrealm
+// META: script=../resources/test-utils.js
+// META: script=/common/gc.js
+'use strict';
+
+promise_test(async () => {
+
+  let controller;
+  new ReadableStream({
+    start(c) {
+      controller = c;
+    }
+  });
+
+  await garbageCollect();
+
+  return delay(50).then(() => {
+    controller.close();
+    assert_throws_js(TypeError, () => controller.close(), 'close should throw a TypeError the second time');
+    controller.error();
+  });
+
+}, 'ReadableStreamController methods should continue working properly when scripts lose their reference to the ' +
+   'readable stream');
+
+promise_test(async () => {
+
+  let controller;
+
+  const closedPromise = new ReadableStream({
+    start(c) {
+      controller = c;
+    }
+  }).getReader().closed;
+
+  await garbageCollect();
+
+  return delay(50).then(() => controller.close()).then(() => closedPromise);
+
+}, 'ReadableStream closed promise should fulfill even if the stream and reader JS references are lost');
+
+promise_test(async t => {
+
+  const theError = new Error('boo');
+  let controller;
+
+  const closedPromise = new ReadableStream({
+    start(c) {
+      controller = c;
+    }
+  }).getReader().closed;
+
+  await garbageCollect();
+
+  return delay(50).then(() => controller.error(theError))
+                  .then(() => promise_rejects_exactly(t, theError, closedPromise));
+
+}, 'ReadableStream closed promise should reject even if stream and reader JS references are lost');
+
+promise_test(async () => {
+
+  const rs = new ReadableStream({});
+
+  rs.getReader();
+
+  await garbageCollect();
+
+  return delay(50).then(() => assert_throws_js(TypeError, () => rs.getReader(),
+    'old reader should still be locking the stream even after garbage collection'));
+
+}, 'Garbage-collecting a ReadableStreamDefaultReader should not unlock its stream');