Implement Android shared memory data fetcher for Device Motion.

content/browser/device_orientation/data_fetcher_impl_android_unittest.cc

+// Copyright (c) 2013 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 "base/android/jni_android.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/process_util.h"
+#include "content/browser/device_orientation/data_fetcher_impl_android.h"

[bulach, 2013/07/12 16:07:43]

nit: I just learned the file under test should be in line 5 followed by another
\n, just like the non-unittest file does.

[timvolodine, 2013/07/12 17:43:56]

Done.

+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+
+namespace {
+
+class MockDataFetcherImplAndroid : public DataFetcherImplAndroid {

[bulach, 2013/07/12 16:07:43]

nit: this should be named as "Fake" instead of "Mock".

see more in gmock documentation:
"""
Note: It is easy to confuse the term fake objects with mock objects. Fakes and
mocks actually mean very different things in the Test-Driven Development (TDD)
community:

Fake objects have working implementations, but usually take some shortcut
(perhaps to make the operations less expensive), which makes them not suitable
for production. An in-memory file system would be an example of a fake.
Mocks are objects pre-programmed with expectations, which form a specification
of the calls they are expected to receive.
"""

[timvolodine, 2013/07/12 17:43:56]

Done.

+ public:
+  MockDataFetcherImplAndroid() { }
+  virtual ~MockDataFetcherImplAndroid() { }
+
+  bool Start(DeviceData::Type event_type,
+                     int rate_in_milliseconds) OVERRIDE {

[bulach, 2013/07/12 16:07:43]

nit: indent

[timvolodine, 2013/07/12 17:43:56]

Done.

+    return true;
+  }
+
+  int GetNumberActiveDeviceMotionSensors() OVERRIDE {
+    return number_active_sensors_;
+  }
+
+  void SetNumberActiveDeviceMotionSensors(int number_active_sensors) {
+    number_active_sensors_ = number_active_sensors;
+  }
+
+ private:
+  int number_active_sensors_;
+};
+
+class AndroidDataFetcherTest : public testing::Test {
+ protected:
+  AndroidDataFetcherTest() {
+    buffer_.reset(new DeviceMotionHardwareBuffer);
+  }
+
+  scoped_ptr<DeviceMotionHardwareBuffer> buffer_;
+};
+
+TEST_F(AndroidDataFetcherTest, ThreeDeviceMotionSensorsActive) {
+  MockDataFetcherImplAndroid::Init(base::android::AttachCurrentThread());
+  MockDataFetcherImplAndroid fetcher;
+  fetcher.SetNumberActiveDeviceMotionSensors(3);
+
+  fetcher.StartFetchingDeviceMotionData(buffer_.get());
+  ASSERT_FALSE(buffer_->data.allAvailableSensorsAreActive);
+
+  fetcher.GotAcceleration(0, 0, 1, 2, 3);
+  ASSERT_FALSE(buffer_->data.allAvailableSensorsAreActive);
+
+  fetcher.GotAccelerationIncludingGravity(0, 0, 1, 2, 3);
+  ASSERT_FALSE(buffer_->data.allAvailableSensorsAreActive);
+
+  fetcher.GotRotationRate(0, 0, 1, 2, 3);
+  ASSERT_TRUE(buffer_->data.allAvailableSensorsAreActive);
+
+  fetcher.StopFetchingDeviceMotionData();
+  ASSERT_FALSE(buffer_->data.allAvailableSensorsAreActive);
+}
+
+TEST_F(AndroidDataFetcherTest, TwoDeviceMotionSensorsActive) {
+  MockDataFetcherImplAndroid::Init(base::android::AttachCurrentThread());
+  MockDataFetcherImplAndroid fetcher;
+  fetcher.SetNumberActiveDeviceMotionSensors(2);
+
+  fetcher.StartFetchingDeviceMotionData(buffer_.get());
+  ASSERT_FALSE(buffer_->data.allAvailableSensorsAreActive);
+
+  fetcher.GotAcceleration(0, 0, 1, 2, 3);
+  ASSERT_FALSE(buffer_->data.allAvailableSensorsAreActive);
+
+  fetcher.GotAccelerationIncludingGravity(0, 0, 1, 2, 3);
+  ASSERT_TRUE(buffer_->data.allAvailableSensorsAreActive);
+
+  fetcher.StopFetchingDeviceMotionData();
+  ASSERT_FALSE(buffer_->data.allAvailableSensorsAreActive);
+}
+
+TEST_F(AndroidDataFetcherTest, ZeroDeviceMotionSensorsActive) {
+  MockDataFetcherImplAndroid::Init(base::android::AttachCurrentThread());
+  MockDataFetcherImplAndroid fetcher;
+  fetcher.SetNumberActiveDeviceMotionSensors(0);
+
+  fetcher.StartFetchingDeviceMotionData(buffer_.get());
+  ASSERT_TRUE(buffer_->data.allAvailableSensorsAreActive);
+
+  fetcher.StopFetchingDeviceMotionData();
+  ASSERT_FALSE(buffer_->data.allAvailableSensorsAreActive);
+}
+
+}  // namespace
+
+}  // namespace content