Add fast test for whether transferable streams are enabled

Add a minimal test for whether transferable streams are functioning or not. This can be used to determine whether they have been shipped or not. The test is in its own directory so that it can be added to the virtual/stable test suite without any other tests. This will ensure we don't accidentally ship transferable streams. BUG=894838 Change-Id: I2de66a55fc1c72ddd742f1d192a152a9264064df Reviewed-on: https://chromium-review.googlesource.com/c/1356723 Commit-Queue: Adam Rice <ricea@chromium.org> Reviewed-by: Yutaka Hirano <yhirano@chromium.org> Cr-Commit-Position: refs/heads/master@{#613060}

Add fast test for whether transferable streams are enabled
Add a minimal test for whether transferable streams are functioning or not. This can be used to determine whether they have been shipped or not. The test is in its own directory so that it can be added to the virtual/stable test suite without any other tests. This will ensure we don't accidentally ship transferable streams. BUG=894838 Change-Id: I2de66a55fc1c72ddd742f1d192a152a9264064df Reviewed-on: https://chromium-review.googlesource.com/c/1356723 Commit-Queue: Adam Rice <ricea@chromium.org> Reviewed-by: Yutaka Hirano <yhirano@chromium.org> Cr-Commit-Position: refs/heads/master@{#613060}
265f3a34 · Adam Rice · Commit Bot · bc505b9f · 265f3a34 · 265f3a34
Commit 265f3a34 authored Dec 03, 2018 by Adam Rice Committed by Commit Bot Dec 03, 2018
4 changed files
--- a/third_party/blink/web_tests/VirtualTestSuites
+++ b/third_party/blink/web_tests/VirtualTestSuites
@@ -210,6 +210,11 @@
    "base": "web-animations-api",
    "args": ["--stable-release-mode"]
  },
+  {
+    "prefix": "stable",
+    "base": "http/tests/streams/transferable/enabled",
+    "args": ["--stable-release-mode"]
+  },
  {
    "prefix": "linux-subpixel",
    "base": "platform/linux/fast/text/subpixel",

--- a/third_party/blink/web_tests/http/tests/streams/transferable/enabled/enabled.html
+++ b/third_party/blink/web_tests/http/tests/streams/transferable/enabled/enabled.html
+<!DOCTYPE html>
+<meta charset="utf-8">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+// Quick test for whether transferable streams are enabled or not, since it
+// doesn't affect the symbols visible on the global object. When not enabled,
+// all the tests should fail. This will help prevent accidentally shipping the
+// feature.
+
+test(() => {
+  const rs = new ReadableStream();
+  postMessage(rs, '*', [rs]);
+}, 'postMessage of a ReadableStream should work');
+
+test(() => {
+  const ws = new WritableStream();
+  postMessage(ws, '*', [ws]);
+}, 'postMessage of a WritableStream should work');
+
+test(() => {
+  const ts = new TransformStream();
+  postMessage(ts, '*', [ts]);
+}, 'postMessage of a TransformStream should work');
+</script>
--- a/third_party/blink/web_tests/virtual/stable/http/tests/streams/transferable/enabled/README.txt
+++ b/third_party/blink/web_tests/virtual/stable/http/tests/streams/transferable/enabled/README.txt
+This test exists to ensure that transferable streams are not shipped by
+accident. If all three subtests are failing, then transferable streams are not
+enabled.
--- a/third_party/blink/web_tests/virtual/stable/http/tests/streams/transferable/enabled/enabled-expected.txt
+++ b/third_party/blink/web_tests/virtual/stable/http/tests/streams/transferable/enabled/enabled-expected.txt
+This is a testharness.js-based test.
+FAIL postMessage of a ReadableStream should work Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type.
+FAIL postMessage of a WritableStream should work Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type.
+FAIL postMessage of a TransformStream should work Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type.
+Harness: the test ran to completion.
+