Script streaming: Add an option to make the main thread block (wait for parsing)

Source/bindings/core/v8/ScriptStreamerTest.cpp

 // Copyright 2014 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 "config.h"
 #include "bindings/core/v8/ScriptStreamer.h"
 
 #include "bindings/core/v8/ScriptSourceCode.h"
 #include "bindings/core/v8/ScriptStreamerThread.h"
+#include "bindings/core/v8/ScriptStreamingMode.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/V8ScriptRunner.h"
 #include "core/dom/PendingScript.h"
 #include "core/frame/Settings.h"
 #include "platform/Task.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/Platform.h"
 
 #include <gtest/gtest.h>
 #include <v8.h>
@@ skipping 30 matching lines @@
     }
 
     PendingScriptWrapper(Element* element, ScriptResource* resource)
         : m_pendingScript(PendingScript(element, resource))
     {
     }
 
     PendingScript m_pendingScript;
 };
 
-class ScriptStreamingTest : public testing::Test {
+// The bool param for ScriptStreamingTest controls whether to make the main
+// thread block and wait for parsing.
+class ScriptStreamingTest : public testing::TestWithParam<bool> {
 public:
     ScriptStreamingTest()
         : m_scope(v8::Isolate::GetCurrent())
         , m_settings(Settings::create())
         , m_resourceRequest("http://www.streaming-test.com/")
         , m_resource(new ScriptResource(m_resourceRequest, "text/utf-8"))
         , m_pendingScript(PendingScriptWrapper::create(0, m_resource)) // Takes ownership of m_resource.
     {
         m_settings->setV8ScriptStreamingEnabled(true);
+        if (GetParam())
+            m_settings->setV8ScriptStreamingMode(ScriptStreamingModeAllPlusBlockParsingBlocking);
         m_resource->setLoading(true);
         ScriptStreamer::setSmallScriptThresholdForTesting(0);
     }
 
     ScriptState* scriptState() const { return m_scope.scriptState(); }
     v8::Isolate* isolate() const { return m_scope.isolate(); }
 
     PendingScript& pendingScript() const { return m_pendingScript->get(); }
 
 protected:
@@ skipping 52 matching lines @@
         : m_finished(false) { }
 
     virtual void notifyFinished(Resource*) override { m_finished = true; }
 
     bool finished() const { return m_finished; }
 
 private:
     bool m_finished;
 };
 
-TEST_F(ScriptStreamingTest, CompilingStreamedScript)
+TEST_P(ScriptStreamingTest, CompilingStreamedScript)
 {
     // Test that we can successfully compile a streamed script.
     ScriptStreamer::startStreaming(pendingScript(), m_settings.get(), m_scope.scriptState(), PendingScript::ParsingBlocking);
     TestScriptResourceClient client;
     pendingScript().watchForLoad(&client);
 
     appendData("function foo() {");
     appendPadding();
     appendData("return 5; }");
     appendPadding();
     appendData("foo();");
     EXPECT_FALSE(client.finished());
     finish();
 
     // Process tasks on the main thread until the streaming background thread
     // has completed its tasks.
     processTasksUntilStreamingComplete();
     EXPECT_TRUE(client.finished());
     bool errorOccurred = false;
     ScriptSourceCode sourceCode = pendingScript().getSource(KURL(), errorOccurred);
     EXPECT_FALSE(errorOccurred);
     EXPECT_TRUE(sourceCode.streamer());
     v8::TryCatch tryCatch;
     v8::Handle<v8::Script> script = V8ScriptRunner::compileScript(sourceCode, isolate());
     EXPECT_FALSE(script.IsEmpty());
     EXPECT_FALSE(tryCatch.HasCaught());
 }
 
-TEST_F(ScriptStreamingTest, CompilingStreamedScriptWithParseError)
+TEST_P(ScriptStreamingTest, CompilingStreamedScriptWithParseError)
 {
     // Test that scripts with parse errors are handled properly. In those cases,
     // the V8 side typically finished before loading finishes: make sure we
     // handle it gracefully.
     ScriptStreamer::startStreaming(pendingScript(), m_settings.get(), m_scope.scriptState(), PendingScript::ParsingBlocking);
     TestScriptResourceClient client;
     pendingScript().watchForLoad(&client);
     appendData("function foo() {");
     appendData("this is the part which will be a parse error");
     // V8 won't realize the parse error until it actually starts parsing the
@@ skipping 12 matching lines @@
     bool errorOccurred = false;
     ScriptSourceCode sourceCode = pendingScript().getSource(KURL(), errorOccurred);
     EXPECT_FALSE(errorOccurred);
     EXPECT_TRUE(sourceCode.streamer());
     v8::TryCatch tryCatch;
     v8::Handle<v8::Script> script = V8ScriptRunner::compileScript(sourceCode, isolate());
     EXPECT_TRUE(script.IsEmpty());
     EXPECT_TRUE(tryCatch.HasCaught());
 }
 
-TEST_F(ScriptStreamingTest, CancellingStreaming)
+TEST_P(ScriptStreamingTest, CancellingStreaming)
 {
     // Test that the upper layers (PendingScript and up) can be ramped down
     // while streaming is ongoing, and ScriptStreamer handles it gracefully.
     ScriptStreamer::startStreaming(pendingScript(), m_settings.get(), m_scope.scriptState(), PendingScript::ParsingBlocking);
     TestScriptResourceClient client;
     pendingScript().watchForLoad(&client);
     appendData("function foo() {");
 
     // In general, we cannot control what the background thread is doing
     // (whether it's parsing or waiting for more data). In this test, we have
     // given it so little data that it's surely waiting for more.
 
     // Simulate cancelling the network load (e.g., because the user navigated
     // away).
     EXPECT_FALSE(client.finished());
     pendingScript().stopWatchingForLoad(&client);
     pendingScript().releaseElementAndClear();
     m_pendingScript = PendingScriptWrapper::create(); // This will destroy m_resource.
     m_resource = 0;
 
     // The V8 side will complete too. This should not crash. We don't receive
     // any results from the streaming and the client doesn't get notified.
     processTasksUntilStreamingComplete();
     EXPECT_FALSE(client.finished());
 }
 
-TEST_F(ScriptStreamingTest, SuppressingStreaming)
+TEST_P(ScriptStreamingTest, SuppressingStreaming)
 {
     // If we notice during streaming that there is a code cache, streaming
     // is suppressed (V8 doesn't parse while the script is loading), and the
     // upper layer (ScriptResourceClient) should get a notification when the
     // script is loaded.
     ScriptStreamer::startStreaming(pendingScript(), m_settings.get(), m_scope.scriptState(), PendingScript::ParsingBlocking);
     TestScriptResourceClient client;
     pendingScript().watchForLoad(&client);
     appendData("function foo() {");
     appendPadding();
 
     m_resource->setCachedMetadata(V8ScriptRunner::tagForCodeCache(), "X", 1, Resource::CacheLocally);
 
     appendPadding();
     finish();
     processTasksUntilStreamingComplete();
     EXPECT_TRUE(client.finished());
 
     bool errorOccurred = false;
     ScriptSourceCode sourceCode = pendingScript().getSource(KURL(), errorOccurred);
     EXPECT_FALSE(errorOccurred);
     // ScriptSourceCode doesn't refer to the streamer, since we have suppressed
     // the streaming and resumed the non-streaming code path for script
     // compilation.
     EXPECT_FALSE(sourceCode.streamer());
 }
 
-TEST_F(ScriptStreamingTest, EmptyScripts)
+TEST_P(ScriptStreamingTest, EmptyScripts)
 {
     // Empty scripts should also be streamed properly, that is, the upper layer
     // (ScriptResourceClient) should be notified when an empty script has been
     // loaded.
     ScriptStreamer::startStreaming(pendingScript(), m_settings.get(), m_scope.scriptState(), PendingScript::ParsingBlocking);
     TestScriptResourceClient client;
     pendingScript().watchForLoad(&client);
 
     // Finish the script without sending any data.
     finish();
     // The finished notification should arrive immediately and not be cycled
     // through a background thread.
     EXPECT_TRUE(client.finished());
 
     bool errorOccurred = false;
     ScriptSourceCode sourceCode = pendingScript().getSource(KURL(), errorOccurred);
     EXPECT_FALSE(errorOccurred);
     EXPECT_FALSE(sourceCode.streamer());
 }
 
-TEST_F(ScriptStreamingTest, SmallScripts)
+TEST_P(ScriptStreamingTest, SmallScripts)
 {
     // Small scripts shouldn't be streamed.
     ScriptStreamer::setSmallScriptThresholdForTesting(100);
 
     ScriptStreamer::startStreaming(pendingScript(), m_settings.get(), m_scope.scriptState(), PendingScript::ParsingBlocking);
     TestScriptResourceClient client;
     pendingScript().watchForLoad(&client);
 
     appendData("function foo() { }");
 
     finish();
 
     // The finished notification should arrive immediately and not be cycled
     // through a background thread.
     EXPECT_TRUE(client.finished());
 
     bool errorOccurred = false;
     ScriptSourceCode sourceCode = pendingScript().getSource(KURL(), errorOccurred);
     EXPECT_FALSE(errorOccurred);
     EXPECT_FALSE(sourceCode.streamer());
 }
 
-TEST_F(ScriptStreamingTest, ScriptsWithSmallFirstChunk)
+TEST_P(ScriptStreamingTest, ScriptsWithSmallFirstChunk)
 {
     // If a script is long enough, if should be streamed, even if the first data
     // chunk is small.
     ScriptStreamer::setSmallScriptThresholdForTesting(100);
 
     ScriptStreamer::startStreaming(pendingScript(), m_settings.get(), m_scope.scriptState(), PendingScript::ParsingBlocking);
     TestScriptResourceClient client;
     pendingScript().watchForLoad(&client);
 
     // This is the first data chunk which is small.
     appendData("function foo() { }");
     appendPadding();
     appendPadding();
     appendPadding();
 
     finish();
 
     processTasksUntilStreamingComplete();
     EXPECT_TRUE(client.finished());
     bool errorOccurred = false;
     ScriptSourceCode sourceCode = pendingScript().getSource(KURL(), errorOccurred);
     EXPECT_FALSE(errorOccurred);
     EXPECT_TRUE(sourceCode.streamer());
     v8::TryCatch tryCatch;
     v8::Handle<v8::Script> script = V8ScriptRunner::compileScript(sourceCode, isolate());
     EXPECT_FALSE(script.IsEmpty());
     EXPECT_FALSE(tryCatch.HasCaught());
 }
 
+INSTANTIATE_TEST_CASE_P(ScriptStreamingInstantiation, ScriptStreamingTest, ::testing::Values(false, true));
+
 } // namespace
 
 } // namespace blink