[worklets] Add AudioWorkletGlobalScope and AudioWorkletThread

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

Index: third_party/WebKit/Source/modules/webaudio/AudioWorkletThreadTest.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioWorkletThreadTest.cpp b/third_party/WebKit/Source/modules/webaudio/AudioWorkletThreadTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..a61bb0ff5b54d5875c70bda15d76e269ca58e639
--- /dev/null
+++ b/third_party/WebKit/Source/modules/webaudio/AudioWorkletThreadTest.cpp
@@ -0,0 +1,202 @@
+// 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/AudioWorkletThread.h"
+
+#include "bindings/core/v8/ScriptSourceCode.h"
+#include "bindings/core/v8/SourceLocation.h"
+#include "bindings/core/v8/V8GCController.h"
+#include "bindings/core/v8/WorkerOrWorkletScriptController.h"
+#include "core/inspector/ConsoleMessage.h"
+#include "core/workers/InProcessWorkerObjectProxy.h"
+#include "core/workers/WorkerBackingThread.h"
+#include "core/workers/WorkerLoaderProxy.h"
+#include "core/workers/WorkerOrWorkletGlobalScope.h"
+#include "core/workers/WorkerThreadStartupData.h"
+#include "platform/CrossThreadFunctional.h"
+#include "platform/WaitableEvent.h"
+#include "platform/WebThreadSupportingGC.h"
+#include "platform/heap/Handle.h"
+#include "platform/testing/TestingPlatformSupport.h"
+#include "platform/testing/UnitTestHelpers.h"
+#include "public/platform/Platform.h"
+#include "public/platform/WebAddressSpace.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "wtf/PtrUtil.h"
+#include <memory>
+
+namespace blink {
+namespace {
+
+    // A null WorkerReportingProxy, supplied when creating AudioWorkletThreads.

[nhiroki, 2016/09/30 11:28:57]

Indents are not necessary.

[hongchan, 2016/10/11 23:42:39]

Done.

+    class TestAudioWorkletReportingProxy : public WorkerReportingProxy {
+    public:
+        static std::unique_ptr<TestAudioWorkletReportingProxy> create()
+        {
+            return wrapUnique(new TestAudioWorkletReportingProxy());
+        }
+
+        // (Empty) WorkerReportingProxy implementation:
+        void reportException(const String& errorMessage, std::unique_ptr<SourceLocation>, int exceptionId) override {}
+        void reportConsoleMessage(MessageSource, MessageLevel, const String& message, SourceLocation*) override {}
+        void postMessageToPageInspector(const String&) override {}
+
+        void didEvaluateWorkerScript(bool success) override {}
+        void didCloseWorkerGlobalScope() override {}
+        void willDestroyWorkerGlobalScope() override {}
+        void didTerminateWorkerThread() override {}
+
+    private:
+        TestAudioWorkletReportingProxy() {}
+    };
+
+} // namespace
+
+class AudioWorkletThreadTest : public ::testing::Test {
+public:
+    void SetUp() override
+    {
+        AudioWorkletThread::createSharedBackingThreadForTest();
+        m_reportingProxy = TestAudioWorkletReportingProxy::create();
+        m_securityOrigin = SecurityOrigin::create(KURL(ParsedURLString, "http://fake.url/"));
+    }
+
+    void TearDown() override
+    {
+        AudioWorkletThread::clearSharedBackingThread();
+    }
+
+    std::unique_ptr<AudioWorkletThread> createAudioWorkletThread()
+    {
+        std::unique_ptr<AudioWorkletThread> thread = AudioWorkletThread::create(nullptr, *m_reportingProxy);
+        thread->start(WorkerThreadStartupData::create(
+            KURL(ParsedURLString, "http://fake.url/"),
+            "fake user agent",
+            "",
+            nullptr,
+            DontPauseWorkerGlobalScopeOnStart,
+            nullptr,
+            "",
+            m_securityOrigin.get(),
+            nullptr,
+            WebAddressSpaceLocal,
+            nullptr,
+            nullptr,
+            V8CacheOptionsDefault));
+        return thread;
+    }
+
+    // Attempts to run some simple script for |thread|.
+    void checkWorkletCanExecuteScript(WorkerThread* thread)
+    {
+        std::unique_ptr<WaitableEvent> waitEvent = wrapUnique(new WaitableEvent());

[nhiroki, 2016/09/30 11:28:58]

You can allocate WaitableEvent on stack.

[hongchan, 2016/10/12 17:24:05]

Done.

+        thread->workerBackingThread().backingThread().postTask(BLINK_FROM_HERE,
+            crossThreadBind(
+                &AudioWorkletThreadTest::executeScriptInWorklet,
+                crossThreadUnretained(this),
+                crossThreadUnretained(thread),
+                crossThreadUnretained(waitEvent.get())));
+        waitEvent->wait();
+    }
+
+private:
+    void executeScriptInWorklet(WorkerThread* thread, WaitableEvent* waitEvent)
+    {
+        WorkerOrWorkletScriptController* scriptController = thread->globalScope()->scriptController();
+        scriptController->evaluate(ScriptSourceCode("var counter = 0; ++counter;"));
+        waitEvent->signal();
+    }
+
+    RefPtr<SecurityOrigin> m_securityOrigin;
+    std::unique_ptr<WorkerReportingProxy> m_reportingProxy;
+};
+
+TEST_F(AudioWorkletThreadTest, Basic)
+{
+    std::unique_ptr<AudioWorkletThread> worklet = createAudioWorkletThread();
+    checkWorkletCanExecuteScript(worklet.get());
+    worklet->terminateAndWait();
+}
+
+// Tests that the same WebThread is used for new worklets if the WebThread is
+// still alive.
+TEST_F(AudioWorkletThreadTest, CreateSecondAndTerminateFirst)
+{
+    // Create the first worklet and wait until it is initialized.
+    std::unique_ptr<AudioWorkletThread> firstWorklet = createAudioWorkletThread();
+    WebThreadSupportingGC* firstThread = &firstWorklet->workerBackingThread().backingThread();
+    checkWorkletCanExecuteScript(firstWorklet.get());
+    v8::Isolate* firstIsolate = firstWorklet->isolate();
+    ASSERT_TRUE(firstIsolate);
+
+    // Create the second worklet and immediately destroy the first worklet.
+    std::unique_ptr<AudioWorkletThread> secondWorklet = createAudioWorkletThread();
+    // We don't use terminateAndWait here to avoid forcible termination.
+    firstWorklet->terminate();
+    firstWorklet->waitForShutdownForTesting();
+
+    // Wait until the second worklet is initialized. Verify that the second
+    // worklet is using the same thread and Isolate as the first worklet.
+    WebThreadSupportingGC* secondThread = &secondWorklet->workerBackingThread().backingThread();
+    ASSERT_EQ(firstThread, secondThread);
+
+    v8::Isolate* secondIsolate = secondWorklet->isolate();
+    ASSERT_TRUE(secondIsolate);
+    EXPECT_EQ(firstIsolate, secondIsolate);
+
+    // Verify that the worklet can still successfully execute script.
+    checkWorkletCanExecuteScript(secondWorklet.get());
+
+    secondWorklet->terminateAndWait();
+}
+
+// Tests that a new WebThread is created if all existing worklets are
+// terminated before a new worklet is created.
+TEST_F(AudioWorkletThreadTest, TerminateFirstAndCreateSecond)
+{
+    // Create the first worklet, wait until it is initialized, and terminate it.
+    std::unique_ptr<AudioWorkletThread> worklet = createAudioWorkletThread();
+    WebThreadSupportingGC* firstThread = &worklet->workerBackingThread().backingThread();
+    checkWorkletCanExecuteScript(worklet.get());
+
+    // We don't use terminateAndWait here to avoid forcible termination.
+    worklet->terminate();
+    worklet->waitForShutdownForTesting();
+
+    // Create the second worklet. The backing thread is same.
+    worklet = createAudioWorkletThread();
+    WebThreadSupportingGC* secondThread = &worklet->workerBackingThread().backingThread();
+    EXPECT_EQ(firstThread, secondThread);
+    checkWorkletCanExecuteScript(worklet.get());
+
+    worklet->terminateAndWait();
+}
+
+// Tests that v8::Isolate and WebThread are correctly set-up if a worklet is
+// created while another is terminating.
+TEST_F(AudioWorkletThreadTest, CreatingSecondDuringTerminationOfFirst)
+{
+    std::unique_ptr<AudioWorkletThread> firstWorklet = createAudioWorkletThread();
+    checkWorkletCanExecuteScript(firstWorklet.get());
+    v8::Isolate* firstIsolate = firstWorklet->isolate();
+    ASSERT_TRUE(firstIsolate);
+
+    // Request termination of the first worklet and create the second worklet
+    // as soon as possible. We don't wait for its termination.
+    // Note: We rely on the assumption that the termination steps don't run
+    // on the worklet thread so quickly. This could be a source of flakiness.
+    firstWorklet->terminate();
+    std::unique_ptr<AudioWorkletThread> secondWorklet = createAudioWorkletThread();
+
+    v8::Isolate* secondIsolate = secondWorklet->isolate();
+    ASSERT_TRUE(secondIsolate);
+    EXPECT_EQ(firstIsolate, secondIsolate);
+
+    // Verify that the isolate can run some scripts correctly in the second
+    // worklet.
+    checkWorkletCanExecuteScript(secondWorklet.get());
+    secondWorklet->terminateAndWait();
+}
+
+} // namespace blink