Merge "Implement basic dvr_tracking-test"

class DvrTrackingTest : public DvrApiTest {};

#if DVR_TRACKING_IMPLEMENTED

// TODO(b/78173557): Implement dvrTrackingXXX API test.

#else

TEST_F(DvrTrackingTest, Implemented) {

  ASSERT_TRUE(api_.TrackingCameraCreate != nullptr);

  ASSERT_TRUE(api_.TrackingCameraStart != nullptr);

  ASSERT_TRUE(api_.TrackingCameraStop != nullptr);

}

TEST_F(DvrTrackingTest, CreateFailsForInvalidInput) {

  int ret;

  ret = api_.TrackingCameraCreate(nullptr);

  EXPECT_EQ(ret, -EINVAL);

  DvrTrackingCamera* camera = reinterpret_cast<DvrTrackingCamera*>(42);

  ret = api_.TrackingCameraCreate(&camera);

  EXPECT_EQ(ret, -EINVAL);

}

TEST_F(DvrTrackingTest, CreateDestroy) {

  DvrTrackingCamera* camera = nullptr;

  int ret = api_.TrackingCameraCreate(&camera);

  EXPECT_EQ(ret, 0);

  ASSERT_TRUE(camera != nullptr);

  api_.TrackingCameraDestroy(camera);

}

#else  // !DVR_TRACKING_IMPLEMENTED

TEST_F(DvrTrackingTest, NotImplemented) {

  ASSERT_TRUE(api_.TrackingCameraCreate != nullptr);