Web Audio: record autoplay status when an AudioContext is destroyed.

third_party/WebKit/Source/modules/webaudio/BaseAudioContextTest.cpp

Index: third_party/WebKit/Source/modules/webaudio/BaseAudioContextTest.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/BaseAudioContextTest.cpp b/third_party/WebKit/Source/modules/webaudio/BaseAudioContextTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..9728f4c123999cdff8ab176ce9e69afbf6e0ba58
--- /dev/null
+++ b/third_party/WebKit/Source/modules/webaudio/BaseAudioContextTest.cpp
@@ -0,0 +1,289 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "modules/webaudio/BaseAudioContext.h"
+
+#include "core/dom/Document.h"
+#include "core/frame/FrameOwner.h"
+#include "core/frame/FrameView.h"
+#include "core/frame/Settings.h"
+#include "core/loader/DocumentLoader.h"
+#include "core/loader/EmptyClients.h"
+#include "core/testing/DummyPageHolder.h"
+#include "platform/UserGestureIndicator.h"
+#include "platform/testing/HistogramTester.h"
+#include "platform/testing/TestingPlatformSupport.h"
+#include "public/platform/WebAudioDevice.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+namespace {
+
+const char* const kCrossOriginMetric = "WebAudio.Autoplay.CrossOrigin";
+
+class MockCrossOriginFrameLoaderClient final : public EmptyFrameLoaderClient {
+ public:
+  static MockCrossOriginFrameLoaderClient* create(Frame* parent) {
+    return new MockCrossOriginFrameLoaderClient(parent);
+  }
+
+  DEFINE_INLINE_VIRTUAL_TRACE() {
+    visitor->trace(m_parent);
+    EmptyFrameLoaderClient::trace(visitor);
+  }
+
+  Frame* parent() const override { return m_parent.get(); }
+  Frame* top() const override { return m_parent.get(); }
+
+ private:
+  explicit MockCrossOriginFrameLoaderClient(Frame* parent) : m_parent(parent) {}
+
+  Member<Frame> m_parent;
+};
+
+class MockWebAudioDevice : public WebAudioDevice {
+ public:
+  explicit MockWebAudioDevice(double sampleRate) : m_sampleRate(sampleRate) {}
+  ~MockWebAudioDevice() override = default;
+
+  void start() override {}
+  void stop() override {}
+  double sampleRate() override { return m_sampleRate; }
+
+ private:
+  double m_sampleRate;
+};
+
+class BaseAudioContextTestPlatform : public TestingPlatformSupport {
+ public:
+  WebAudioDevice* createAudioDevice(size_t bufferSize,
+                                    unsigned numberOfInputChannels,
+                                    unsigned numberOfChannels,
+                                    double sampleRate,
+                                    WebAudioDevice::RenderCallback*,
+                                    const WebString& deviceId,
+                                    const WebSecurityOrigin&) override {
+    return new MockWebAudioDevice(sampleRate);
+  }
+
+  double audioHardwareSampleRate() override { return 44100; }
+};
+
+}  // anonymous namespace
+
+class BaseAudioContextTest : public ::testing::Test {
+ protected:
+  using AutoplayStatus = BaseAudioContext::AutoplayStatus;
+
+  void SetUp() override {
+    m_dummyPageHolder = DummyPageHolder::create();
+    m_dummyFrameOwner = DummyFrameOwner::create();
+    document().updateSecurityOrigin(
+        SecurityOrigin::create("https", "example.com", 80));
+  }
+
+  void TearDown() override {
+    if (m_childFrame) {
+      m_childDocumentLoader->detachFromFrame();
+      m_childDocumentLoader.clear();
+      m_childFrame->detach(FrameDetachType::Remove);
+    }
+  }
+
+  void createChildFrame() {
+    m_childFrame = LocalFrame::create(
+        MockCrossOriginFrameLoaderClient::create(document().frame()),
+        document().frame()->host(), m_dummyFrameOwner.get());
+    m_childFrame->setView(
+        FrameView::create(m_childFrame.get(), IntSize(500, 500)));
+    m_childFrame->init();
+    m_childDocumentLoader = DocumentLoader::create(
+        m_childFrame.get(), ResourceRequest("https://www.example.com"),
+        SubstituteData());
+
+    childDocument().updateSecurityOrigin(
+        SecurityOrigin::create("https", "cross-origin.com", 80));
+  }
+
+  Document& document() { return m_dummyPageHolder->document(); }
+
+  Document& childDocument() { return *m_childFrame->document(); }
+
+  ScriptState* getScriptStateFrom(const Document& document) {
+    return ScriptState::forMainWorld(document.frame());
+  }
+
+  void rejectPendingResolvers(BaseAudioContext* audioContext) {
+    audioContext->rejectPendingResolvers();
+  }
+
+  void recordAutoplayStatus(BaseAudioContext* audioContext) {
+    audioContext->recordAutoplayStatus();
+  }
+
+ private:
+  std::unique_ptr<DummyPageHolder> m_dummyPageHolder;
+  Persistent<DummyFrameOwner> m_dummyFrameOwner;
+
+  Persistent<LocalFrame> m_childFrame;
+  Persistent<DocumentLoader> m_childDocumentLoader;
+
+  BaseAudioContextTestPlatform m_testPlatform;
+};
+
+TEST_F(BaseAudioContextTest, AutoplayMetrics_NoRestriction) {
+  HistogramTester histogramTester;
+
+  BaseAudioContext* audioContext =
+      BaseAudioContext::create(document(), ASSERT_NO_EXCEPTION);
+  recordAutoplayStatus(audioContext);
+
+  histogramTester.expectTotalCount(kCrossOriginMetric, 0);
+}
+
+TEST_F(BaseAudioContextTest, AutoplayMetrics_CreateNoGesture) {
+  HistogramTester histogramTester;
+  createChildFrame();
+  childDocument().settings()->setMediaPlaybackRequiresUserGesture(true);
+
+  BaseAudioContext* audioContext =
+      BaseAudioContext::create(childDocument(), ASSERT_NO_EXCEPTION);
+  recordAutoplayStatus(audioContext);
+
+  histogramTester.expectBucketCount(kCrossOriginMetric,
+                                    AutoplayStatus::AutoplayStatusFailed, 1);
+  histogramTester.expectTotalCount(kCrossOriginMetric, 1);
+}
+
+TEST_F(BaseAudioContextTest, AutoplayMetrics_CallResumeNoGesture) {
+  HistogramTester histogramTester;
+  createChildFrame();
+  childDocument().settings()->setMediaPlaybackRequiresUserGesture(true);
+
+  ScriptState::Scope scope(getScriptStateFrom(childDocument()));

[haraken, 2016/10/11 03:45:47]

Or you can use V8TestingScope, which will provide basic functionalities to test
things that involve V8.

+
+  BaseAudioContext* audioContext =
+      BaseAudioContext::create(childDocument(), ASSERT_NO_EXCEPTION);
+  audioContext->resumeContext(getScriptStateFrom(childDocument()));
+  rejectPendingResolvers(audioContext);
+  recordAutoplayStatus(audioContext);
+
+  histogramTester.expectBucketCount(kCrossOriginMetric,
+                                    AutoplayStatus::AutoplayStatusFailed, 1);
+  histogramTester.expectTotalCount(kCrossOriginMetric, 1);
+}
+
+TEST_F(BaseAudioContextTest, AutoplayMetrics_CreateGesture) {
+  HistogramTester histogramTester;
+  createChildFrame();
+  childDocument().settings()->setMediaPlaybackRequiresUserGesture(true);
+
+  UserGestureIndicator userGestureScope(DefinitelyProcessingUserGesture);
+
+  BaseAudioContext* audioContext =
+      BaseAudioContext::create(childDocument(), ASSERT_NO_EXCEPTION);
+  recordAutoplayStatus(audioContext);
+
+  histogramTester.expectBucketCount(kCrossOriginMetric,
+                                    AutoplayStatus::AutoplayStatusSucceeded, 1);
+  histogramTester.expectTotalCount(kCrossOriginMetric, 1);
+}
+
+TEST_F(BaseAudioContextTest, AutoplayMetrics_CallResumeGesture) {
+  HistogramTester histogramTester;
+  createChildFrame();
+  childDocument().settings()->setMediaPlaybackRequiresUserGesture(true);
+
+  ScriptState::Scope scope(getScriptStateFrom(childDocument()));
+
+  BaseAudioContext* audioContext =
+      BaseAudioContext::create(childDocument(), ASSERT_NO_EXCEPTION);
+
+  UserGestureIndicator userGestureScope(DefinitelyProcessingUserGesture);
+
+  audioContext->resumeContext(getScriptStateFrom(childDocument()));
+  rejectPendingResolvers(audioContext);
+  recordAutoplayStatus(audioContext);
+
+  histogramTester.expectBucketCount(kCrossOriginMetric,
+                                    AutoplayStatus::AutoplayStatusSucceeded, 1);
+  histogramTester.expectTotalCount(kCrossOriginMetric, 1);
+}
+
+TEST_F(BaseAudioContextTest, AutoplayMetrics_NodeStartNoGesture) {
+  HistogramTester histogramTester;
+  createChildFrame();
+  childDocument().settings()->setMediaPlaybackRequiresUserGesture(true);
+
+  BaseAudioContext* audioContext =
+      BaseAudioContext::create(childDocument(), ASSERT_NO_EXCEPTION);
+  audioContext->maybeRecordStartAttempt();
+  recordAutoplayStatus(audioContext);
+
+  histogramTester.expectBucketCount(kCrossOriginMetric,
+                                    AutoplayStatus::AutoplayStatusFailed, 1);
+  histogramTester.expectTotalCount(kCrossOriginMetric, 1);
+}
+
+TEST_F(BaseAudioContextTest, AutoplayMetrics_NodeStartGesture) {
+  HistogramTester histogramTester;
+  createChildFrame();
+  childDocument().settings()->setMediaPlaybackRequiresUserGesture(true);
+
+  BaseAudioContext* audioContext =
+      BaseAudioContext::create(childDocument(), ASSERT_NO_EXCEPTION);
+
+  UserGestureIndicator userGestureScope(DefinitelyProcessingUserGesture);
+  audioContext->maybeRecordStartAttempt();
+  recordAutoplayStatus(audioContext);
+
+  histogramTester.expectBucketCount(
+      kCrossOriginMetric, AutoplayStatus::AutoplayStatusFailedWithStart, 1);
+  histogramTester.expectTotalCount(kCrossOriginMetric, 1);
+}
+
+TEST_F(BaseAudioContextTest, AutoplayMetrics_NodeStartNoGestureThenSuccess) {
+  HistogramTester histogramTester;
+  createChildFrame();
+  childDocument().settings()->setMediaPlaybackRequiresUserGesture(true);
+
+  ScriptState::Scope scope(getScriptStateFrom(childDocument()));
+
+  BaseAudioContext* audioContext =
+      BaseAudioContext::create(childDocument(), ASSERT_NO_EXCEPTION);
+  audioContext->maybeRecordStartAttempt();
+
+  UserGestureIndicator userGestureScope(DefinitelyProcessingUserGesture);
+  audioContext->resumeContext(getScriptStateFrom(childDocument()));
+  rejectPendingResolvers(audioContext);
+  recordAutoplayStatus(audioContext);
+
+  histogramTester.expectBucketCount(kCrossOriginMetric,
+                                    AutoplayStatus::AutoplayStatusSucceeded, 1);
+  histogramTester.expectTotalCount(kCrossOriginMetric, 1);
+}
+
+TEST_F(BaseAudioContextTest, AutoplayMetrics_NodeStartGestureThenSucces) {
+  HistogramTester histogramTester;
+  createChildFrame();
+  childDocument().settings()->setMediaPlaybackRequiresUserGesture(true);
+
+  ScriptState::Scope scope(getScriptStateFrom(childDocument()));
+
+  BaseAudioContext* audioContext =
+      BaseAudioContext::create(childDocument(), ASSERT_NO_EXCEPTION);
+
+  UserGestureIndicator userGestureScope(DefinitelyProcessingUserGesture);
+  audioContext->maybeRecordStartAttempt();
+  audioContext->resumeContext(getScriptStateFrom(childDocument()));
+  rejectPendingResolvers(audioContext);
+  recordAutoplayStatus(audioContext);
+
+  histogramTester.expectBucketCount(kCrossOriginMetric,
+                                    AutoplayStatus::AutoplayStatusSucceeded, 1);
+  histogramTester.expectTotalCount(kCrossOriginMetric, 1);
+}
+
+}  // namespace blink