[DeviceLight] Add renderer+common parts

content/renderer/device_sensors/device_light_event_pump_unittest.cc

Index: content/renderer/device_sensors/device_light_event_pump_unittest.cc
diff --git a/content/renderer/device_sensors/device_light_event_pump_unittest.cc b/content/renderer/device_sensors/device_light_event_pump_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..08182f7b1b48e5433f7f63cacb6c17e9f1214e0f
--- /dev/null
+++ b/content/renderer/device_sensors/device_light_event_pump_unittest.cc
@@ -0,0 +1,142 @@
+// 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 "device_light_event_pump.h"
+
+#include "base/message_loop/message_loop.h"
+#include "content/common/device_sensors/device_light_hardware_buffer.h"
+#include "content/public/test/test_utils.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/WebKit/public/platform/WebDeviceLightListener.h"
+
+namespace content {
+
+class MockDeviceLightListener : public blink::WebDeviceLightListener {
+ public:
+  MockDeviceLightListener() : did_change_device_light_(false) {}
+  virtual ~MockDeviceLightListener() {}
+
+  virtual void didChangeDeviceLight(double value) OVERRIDE {
+    data_.value = value;
+    did_change_device_light_ = true;
+  }
+
+  bool did_change_device_light() const { return did_change_device_light_; }
+
+  void set_did_change_device_light(bool value) {
+    did_change_device_light_ = value;
+  }
+
+  const DeviceLightData& data() const { return data_; }
+
+ private:
+  bool did_change_device_light_;
+  DeviceLightData data_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockDeviceLightListener);
+};
+
+class DeviceLightEventPumpForTesting : public DeviceLightEventPump {
+ public:
+  DeviceLightEventPumpForTesting() {}
+  virtual ~DeviceLightEventPumpForTesting() {}
+
+  void OnDidStart(base::SharedMemoryHandle renderer_handle) {
+    DeviceLightEventPump::OnDidStart(renderer_handle);
+  }
+  virtual bool SendStartMessage() OVERRIDE { return true; }
+  virtual bool SendStopMessage() OVERRIDE { return true; }
+  virtual void FireEvent() OVERRIDE {
+    DeviceLightEventPump::FireEvent();
+    Stop();
+    base::MessageLoop::current()->QuitWhenIdle();
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DeviceLightEventPumpForTesting);
+};
+
+class DeviceLightEventPumpTest : public testing::Test {
+ public:
+  DeviceLightEventPumpTest() {
+    EXPECT_TRUE(shared_memory_.CreateAndMapAnonymous(
+        sizeof(DeviceLightHardwareBuffer)));
+  }
+
+ protected:
+  virtual void SetUp() OVERRIDE {
+    const DeviceLightHardwareBuffer* null_buffer = NULL;
+    listener_.reset(new MockDeviceLightListener);
+    light_pump_.reset(new DeviceLightEventPumpForTesting);
+    buffer_ = static_cast<DeviceLightHardwareBuffer*>(shared_memory_.memory());
+    ASSERT_NE(null_buffer, buffer_);
+    ASSERT_TRUE(shared_memory_.ShareToProcess(base::GetCurrentProcessHandle(),
+                                              &handle_));
+  }
+
+  void InitBuffer() {
+    DeviceLightData& data = buffer_->data;
+    data.value = 1.0;
+  }
+
+  MockDeviceLightListener* listener() { return listener_.get(); }
+  DeviceLightEventPumpForTesting* light_pump() { return light_pump_.get(); }
+  base::SharedMemoryHandle handle() { return handle_; }
+  DeviceLightHardwareBuffer* buffer() { return buffer_; }
+
+ private:
+  scoped_ptr<MockDeviceLightListener> listener_;
+  scoped_ptr<DeviceLightEventPumpForTesting> light_pump_;
+  base::SharedMemoryHandle handle_;
+  base::SharedMemory shared_memory_;
+  DeviceLightHardwareBuffer* buffer_;
+
+  DISALLOW_COPY_AND_ASSIGN(DeviceLightEventPumpTest);
+};
+
+TEST_F(DeviceLightEventPumpTest, DidStartPolling) {
+  base::MessageLoopForUI loop;
+
+  InitBuffer();
+
+  light_pump()->SetListener(listener());
+  light_pump()->OnDidStart(handle());
+
+  base::MessageLoop::current()->Run();
+
+  const DeviceLightData& received_data = listener()->data();
+  EXPECT_TRUE(listener()->did_change_device_light());
+  EXPECT_EQ(1, static_cast<double>(received_data.value));
+}
+
+TEST_F(DeviceLightEventPumpTest, DidStartPollingValuesEqual) {
+  base::MessageLoopForUI loop;
+
+  InitBuffer();
+
+  light_pump()->SetListener(listener());
+  light_pump()->OnDidStart(handle());
+
+  base::MessageLoop::current()->Run();
+
+  const DeviceLightData& received_data = listener()->data();
+  EXPECT_TRUE(listener()->did_change_device_light());
+  EXPECT_EQ(1, static_cast<double>(received_data.value));
+
+  double last_seen_data = received_data.value;
+  // Set next value to be same as previous value.
+  buffer()->data.value = 1.0;
+  listener()->set_did_change_device_light(false);
+  base::MessageLoop::current()->PostTask(
+      FROM_HERE,
+      base::Bind(&DeviceLightEventPumpForTesting::FireEvent,
+                 base::Unretained(light_pump())));
+  base::MessageLoop::current()->Run();
+
+  // No change in device light as present value is same as previous value.
+  EXPECT_FALSE(listener()->did_change_device_light());
+  EXPECT_EQ(last_seen_data, static_cast<double>(received_data.value));
+}
+
+}  // namespace content