Make EventHandler::ActiveIntervalTimer mockable.

Source/core/testing/TimerTest.cpp

Index: Source/core/testing/TimerTest.cpp
diff --git a/Source/core/testing/TimerTest.cpp b/Source/core/testing/TimerTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..19d123dd39c4baaa518c49e5e445cd869e16fc25
--- /dev/null
+++ b/Source/core/testing/TimerTest.cpp
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2013 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "platform/Timer.h"
+
+#include "core/testing/UnitTestHelpers.h"
+#include <gtest/gtest.h>
+
+
+namespace {
+
+class Counter {
+public:
+    Counter()
+        : m_count(0) { }
+
+    void timerFired(WebCore::Timer<Counter>*) { m_count++; }
+    void reset() { m_count = 0; }
+    int count() const { return m_count; }
+
+private:
+    int m_count;
+};
+
+class MockableTimerTest : public ::testing::Test {
+public:
+    MockableTimerTest()
+        : m_counter()
+        , m_timer(&m_counter, &Counter::timerFired)
+    {
+    }
+
+    Counter m_counter;
+    WebCore::MockableTimer<Counter> m_timer;
+};
+
+TEST_F(MockableTimerTest, ResumedFire)
+{
+    ASSERT_EQ(0, m_counter.count());
+    m_timer.startOneShot(0);
+    WebCore::testing::runPendingTasks();
+    ASSERT_EQ(1, m_counter.count());
+
+    m_timer.setManualModeForTesting(true);
+    m_timer.startOneShot(0);
+    WebCore::testing::runPendingTasks();
+    ASSERT_EQ(1, m_counter.count());
+
+    m_timer.setManualModeForTesting(false);
+    m_timer.startOneShot(0);
+    WebCore::testing::runPendingTasks();
+    ASSERT_EQ(2, m_counter.count());
+}
+
+TEST_F(MockableTimerTest, MockedOneShotFire)
+{
+    m_timer.setManualModeForTesting(true);
+    m_timer.startOneShot(0);
+    ASSERT_TRUE(m_timer.isActive());
+    ASSERT_EQ(0, m_counter.count());
+    m_timer.manualFireForTesting();
+    ASSERT_FALSE(m_timer.isActive());
+    ASSERT_EQ(1, m_counter.count());
+    m_timer.startOneShot(0);
+    m_timer.manualFireForTesting();
+    ASSERT_EQ(2, m_counter.count());
+}
+
+TEST_F(MockableTimerTest, MockedRepeatingFire)
+{
+    m_timer.setManualModeForTesting(true);
+    m_timer.startRepeating(1);
+    ASSERT_TRUE(m_timer.isActive());
+    ASSERT_EQ(0, m_counter.count());
+    m_timer.manualFireForTesting();
+    ASSERT_TRUE(m_timer.isActive());
+    ASSERT_EQ(1, m_counter.count());
+    m_timer.manualFireForTesting();
+    ASSERT_EQ(2, m_counter.count());
+}
+
+TEST_F(MockableTimerTest, FirePending)
+{
+    m_timer.setManualModeForTesting(true);
+    m_timer.startOneShot(0);
+    ASSERT_TRUE(m_timer.isActive());
+    ASSERT_EQ(0, m_counter.count());
+    WebCore::testing::runPendingTasks();
+    ASSERT_FALSE(m_timer.isActive());
+    m_timer.manualFireForTesting();
+    ASSERT_EQ(1, m_counter.count());
+}
+
+} // namespace