rollforward cr/2296923004 with fix: updated unittest to prevent issue with unreachable code (win_ch…

third_party/WebKit/Source/core/inspector/InspectorWebPerfAgentTest.cpp

Index: third_party/WebKit/Source/core/inspector/InspectorWebPerfAgentTest.cpp
diff --git a/third_party/WebKit/Source/core/inspector/InspectorWebPerfAgentTest.cpp b/third_party/WebKit/Source/core/inspector/InspectorWebPerfAgentTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..ff5fd7c4d11053dd51b4d6ab15f561692d6ee2f6
--- /dev/null
+++ b/third_party/WebKit/Source/core/inspector/InspectorWebPerfAgentTest.cpp
@@ -0,0 +1,121 @@
+// 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 "core/inspector/InspectorWebPerfAgent.h"
+
+#include "core/frame/Location.h"
+#include "core/inspector/InspectedFrames.h"
+#include "core/testing/DummyPageHolder.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "wtf/PtrUtil.h"
+
+#include <memory>
+
+namespace blink {
+
+class InspectorWebPerfAgentTest : public ::testing::Test {
+protected:
+    void SetUp() override;
+    LocalFrame* frame() const { return m_pageHolder->document().frame(); }
+    ExecutionContext* executionContext() const { return &m_pageHolder->document(); }
+    ExecutionContext* anotherExecutionContext() const { return &m_anotherPageHolder->document(); }
+
+    String frameContextURL();
+    int numUniqueFrameContextsSeen();
+
+    Persistent<InspectorWebPerfAgent> m_agent;
+    std::unique_ptr<DummyPageHolder> m_pageHolder;
+    std::unique_ptr<DummyPageHolder> m_anotherPageHolder;
+};
+
+void InspectorWebPerfAgentTest::SetUp()
+{
+    m_pageHolder = DummyPageHolder::create(IntSize(800, 600));
+    m_pageHolder->document().setURL(KURL(KURL(), "https://example.com/foo"));
+    m_agent = new InspectorWebPerfAgent(InspectedFrames::create(frame()));
+
+    // Create another dummy page holder and pretend this is the iframe.
+    m_anotherPageHolder = DummyPageHolder::create(IntSize(400, 300));
+    m_anotherPageHolder->document().setURL(KURL(KURL(), "https://iframed.com/bar"));
+}
+
+String InspectorWebPerfAgentTest::frameContextURL()
+{
+    // This is reported only if there is a single frameContext URL.
+    if (m_agent->m_frameContextLocations.size() != 1)
+        return "";
+    Location* location = (*m_agent->m_frameContextLocations.begin()).get();

[panicker, 2016/09/16 01:22:52]

this is the only line that changed in rollforward.

+    return String(location->protocol()) + "//"
+        + location->hostname() + location->pathname();
+}
+
+int InspectorWebPerfAgentTest::numUniqueFrameContextsSeen()
+{
+    return m_agent->m_frameContextLocations.size();
+}
+
+TEST_F(InspectorWebPerfAgentTest, SingleScriptInTask)
+{
+    m_agent->willProcessTask();
+    EXPECT_EQ(0, numUniqueFrameContextsSeen());
+    m_agent->willExecuteScript(executionContext());
+    EXPECT_EQ(1, numUniqueFrameContextsSeen());
+    m_agent->didExecuteScript();
+    m_agent->didProcessTask();
+    m_agent->ReportTaskTime(3719349.445172, 3719349.5561923); // Long task
+    EXPECT_EQ(1, numUniqueFrameContextsSeen());
+    EXPECT_EQ("https://example.com/foo", frameContextURL());
+}
+
+TEST_F(InspectorWebPerfAgentTest, MultipleScriptsInTask_SingleContext)
+{
+    m_agent->willProcessTask();
+    EXPECT_EQ(0, numUniqueFrameContextsSeen());
+    m_agent->willExecuteScript(executionContext());
+    EXPECT_EQ(1, numUniqueFrameContextsSeen());
+    m_agent->didExecuteScript();
+    EXPECT_EQ("https://example.com/foo", frameContextURL());
+
+    m_agent->willExecuteScript(executionContext());
+    EXPECT_EQ(1, numUniqueFrameContextsSeen());
+    m_agent->didExecuteScript();
+    m_agent->didProcessTask();
+    m_agent->ReportTaskTime(3719349.445172, 3719349.5561923); // Long task
+    EXPECT_EQ(1, numUniqueFrameContextsSeen());
+    EXPECT_EQ("https://example.com/foo", frameContextURL());
+}
+
+TEST_F(InspectorWebPerfAgentTest, MultipleScriptsInTask_MultipleContexts)
+{
+    m_agent->willProcessTask();
+    EXPECT_EQ(0, numUniqueFrameContextsSeen());
+    m_agent->willExecuteScript(executionContext());
+    EXPECT_EQ(1, numUniqueFrameContextsSeen());
+    m_agent->didExecuteScript();
+    EXPECT_EQ("https://example.com/foo", frameContextURL());
+
+    m_agent->willExecuteScript(anotherExecutionContext());
+    EXPECT_EQ(2, numUniqueFrameContextsSeen());
+    m_agent->didExecuteScript();
+    m_agent->didProcessTask();
+    m_agent->ReportTaskTime(3719349.445172, 3719349.5561923); // Long task
+    EXPECT_EQ(2, numUniqueFrameContextsSeen());
+    EXPECT_EQ("", frameContextURL());
+}
+
+TEST_F(InspectorWebPerfAgentTest, NoScriptInLongTask)
+{
+    m_agent->willProcessTask();
+    m_agent->willExecuteScript(executionContext());
+    m_agent->didExecuteScript();
+    m_agent->didProcessTask();
+    m_agent->ReportTaskTime(3719349.445172, 3719349.445182);
+    m_agent->willProcessTask();
+    m_agent->didProcessTask();
+    m_agent->ReportTaskTime(3719349.445172, 3719349.5561923); // Long task
+    // Without presence of Script, FrameContext URL is not available
+    EXPECT_EQ(0, numUniqueFrameContextsSeen());
+}
+
+} // namespace blink