[ES6 modules] Introduce ModuleScriptLoader

third_party/WebKit/Source/core/loader/modulescript/ModuleScriptLoaderTest.cpp

Index: third_party/WebKit/Source/core/loader/modulescript/ModuleScriptLoaderTest.cpp
diff --git a/third_party/WebKit/Source/core/loader/modulescript/ModuleScriptLoaderTest.cpp b/third_party/WebKit/Source/core/loader/modulescript/ModuleScriptLoaderTest.cpp
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index 0000000000000000000000000000000000000000..42910debcd6d043a72869b6758aa3e0b3b3a28a0
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+++ b/third_party/WebKit/Source/core/loader/modulescript/ModuleScriptLoaderTest.cpp
@@ -0,0 +1,164 @@
+// Copyright 2017 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 "core/loader/modulescript/ModuleScriptLoader.h"
+
+#include "core/dom/Document.h"
+#include "core/dom/Modulator.h"
+#include "core/dom/ModuleScript.h"
+#include "core/loader/modulescript/ModuleScriptFetchRequest.h"
+#include "core/loader/modulescript/ModuleScriptLoaderClient.h"
+#include "core/loader/modulescript/ModuleScriptLoaderRegistry.h"
+#include "core/testing/DummyModulator.h"
+#include "core/testing/DummyPageHolder.h"
+#include "platform/heap/Handle.h"
+#include "platform/loader/fetch/ResourceFetcher.h"
+#include "platform/loader/testing/FetchTestingPlatformSupport.h"
+#include "platform/loader/testing/MockFetchContext.h"
+#include "platform/testing/URLTestHelpers.h"
+#include "platform/testing/UnitTestHelpers.h"
+#include "public/platform/Platform.h"
+#include "public/platform/WebURLLoaderMockFactory.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+namespace {
+
+class TestModuleScriptLoaderClient final
+    : public GarbageCollectedFinalized<TestModuleScriptLoaderClient>,
+      public ModuleScriptLoaderClient {
+  USING_GARBAGE_COLLECTED_MIXIN(TestModuleScriptLoaderClient);
+
+ public:
+  TestModuleScriptLoaderClient() = default;
+  ~TestModuleScriptLoaderClient() override {}
+
+  DEFINE_INLINE_TRACE() { visitor->trace(m_moduleScript); }
+
+  void notifyNewSingleModuleFinished(ModuleScript* moduleScript) override {
+    m_wasNotifyFinished = true;
+    m_moduleScript = moduleScript;
+  }
+
+  bool wasNotifyFinished() const { return m_wasNotifyFinished; }
+  ModuleScript* moduleScript() { return m_moduleScript; }
+
+ private:
+  bool m_wasNotifyFinished = false;
+  Member<ModuleScript> m_moduleScript;
+};
+
+class ModuleScriptLoaderTestModulator final : public DummyModulator {
+ public:
+  ModuleScriptLoaderTestModulator(RefPtr<ScriptState> scriptState,
+                                  RefPtr<SecurityOrigin> securityOrigin)
+      : m_scriptState(std::move(scriptState)),
+        m_securityOrigin(std::move(securityOrigin)) {}
+
+  ~ModuleScriptLoaderTestModulator() override {}
+
+  SecurityOrigin* securityOrigin() override { return m_securityOrigin.get(); }
+
+  ScriptModule compileModule(const String& script,
+                             const String& urlStr) override {
+    ScriptState::Scope scope(m_scriptState.get());
+    return ScriptModule::compile(m_scriptState->isolate(),
+                                 "export default 'foo';", "");
+  }
+
+  DECLARE_TRACE();
+
+ private:
+  RefPtr<ScriptState> m_scriptState;
+  RefPtr<SecurityOrigin> m_securityOrigin;
+};
+
+DEFINE_TRACE(ModuleScriptLoaderTestModulator) {
+  DummyModulator::trace(visitor);
+}
+
+}  // namespace
+
+class ModuleScriptLoaderTest : public ::testing::Test {
+  DISALLOW_COPY_AND_ASSIGN(ModuleScriptLoaderTest);
+
+ public:
+  ModuleScriptLoaderTest() = default;
+  void SetUp() override;
+
+  LocalFrame& frame() { return m_dummyPageHolder->frame(); }
+  Document& document() { return m_dummyPageHolder->document(); }
+  ResourceFetcher* fetcher() { return m_fetcher.get(); }
+  Modulator* modulator() { return m_modulator.get(); }
+
+ protected:
+  ScopedTestingPlatformSupport<FetchTestingPlatformSupport> m_platform;
+  std::unique_ptr<DummyPageHolder> m_dummyPageHolder;
+  Persistent<ResourceFetcher> m_fetcher;
+  Persistent<Modulator> m_modulator;
+};
+
+void ModuleScriptLoaderTest::SetUp() {
+  m_platform->advanceClockSeconds(1.);  // For non-zero DocumentParserTimings
+  m_dummyPageHolder = DummyPageHolder::create(IntSize(500, 500));
+  document().setURL(KURL(KURL(), "https://example.test"));
+  m_fetcher = ResourceFetcher::create(
+      MockFetchContext::create(MockFetchContext::kShouldLoadNewResource));
+  m_modulator = new ModuleScriptLoaderTestModulator(
+      ScriptState::forMainWorld(&frame()), document().getSecurityOrigin());
+}
+
+TEST_F(ModuleScriptLoaderTest, fetchDataURL) {
+  ModuleScriptLoaderRegistry* registry = ModuleScriptLoaderRegistry::create();
+  KURL url(KURL(), "data:text/javascript,export default 'grapes';");
+  ModuleScriptFetchRequest moduleRequest(
+      url, String(), ParserInserted, WebURLRequest::FetchCredentialsModeOmit);
+  TestModuleScriptLoaderClient* client = new TestModuleScriptLoaderClient;
+  registry->fetch(moduleRequest, ModuleGraphLevel::TopLevelModuleFetch,
+                  modulator(), fetcher(), client);
+
+  EXPECT_TRUE(client->wasNotifyFinished())
+      << "ModuleScriptLoader should finish synchronously.";
+  ASSERT_TRUE(client->moduleScript());
+  EXPECT_EQ(client->moduleScript()->instantiationState(),
+            ModuleInstantiationState::Uninstantiated);
+}
+
+TEST_F(ModuleScriptLoaderTest, fetchInvalidURL) {
+  ModuleScriptLoaderRegistry* registry = ModuleScriptLoaderRegistry::create();
+  KURL url;
+  EXPECT_FALSE(url.isValid());
+  ModuleScriptFetchRequest moduleRequest(
+      url, String(), ParserInserted, WebURLRequest::FetchCredentialsModeOmit);
+  TestModuleScriptLoaderClient* client = new TestModuleScriptLoaderClient;
+  registry->fetch(moduleRequest, ModuleGraphLevel::TopLevelModuleFetch,
+                  modulator(), fetcher(), client);
+
+  EXPECT_TRUE(client->wasNotifyFinished())
+      << "ModuleScriptLoader should finish synchronously.";
+  EXPECT_FALSE(client->moduleScript());
+}
+
+TEST_F(ModuleScriptLoaderTest, fetchURL) {
+  KURL url(ParsedURLString, "http://127.0.0.1:8000/module.js");
+  URLTestHelpers::registerMockedURLLoad(
+      url, testing::webTestDataPath("module.js"), "text/javascript");
+
+  ModuleScriptLoaderRegistry* registry = ModuleScriptLoaderRegistry::create();
+  ModuleScriptFetchRequest moduleRequest(
+      url, String(), ParserInserted, WebURLRequest::FetchCredentialsModeOmit);
+  TestModuleScriptLoaderClient* client = new TestModuleScriptLoaderClient;
+  registry->fetch(moduleRequest, ModuleGraphLevel::TopLevelModuleFetch,
+                  modulator(), fetcher(), client);
+
+  EXPECT_FALSE(client->wasNotifyFinished())
+      << "ModuleScriptLoader unexpectedly finished synchronously.";
+  m_platform->getURLLoaderMockFactory()->serveAsynchronousRequests();
+
+  EXPECT_TRUE(client->wasNotifyFinished());
+  EXPECT_FALSE(client->moduleScript());
+}
+
+}  // namespace blink