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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/camera_presence_notifier/camera_presence_notifier.h"
#include <string>
#include "ash/capture_mode/fake_video_source_provider.h"
#include "base/run_loop.h"
#include "base/strings/string_number_conversions.h"
#include "base/test/gmock_callback_support.h"
#include "content/public/browser/video_capture_service.h"
#include "content/public/test/browser_task_environment.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "services/video_capture/public/mojom/video_capture_service.mojom.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace ash {
namespace {
constexpr char kFakeCameraDeviceId[] = "/dev/videoX";
constexpr char kFakeCameraDisplayName[] = "Fake Camera";
constexpr char kFakeCameraModelId[] = "0def:c000";
} // namespace
class FakeVideoCaptureService
: public video_capture::mojom::VideoCaptureService {
public:
FakeVideoCaptureService() = default;
~FakeVideoCaptureService() override = default;
void AddFakeCamera() {
const std::string camera_id =
kFakeCameraDeviceId + base::NumberToString(next_id_++);
used_ids_.push_back(camera_id);
fake_provider_.AddFakeCameraWithoutNotifying(
camera_id, kFakeCameraDisplayName, kFakeCameraModelId,
media::MEDIA_VIDEO_FACING_NONE);
}
void RemoveFakeCamera() {
ASSERT_FALSE(used_ids_.empty());
fake_provider_.RemoveFakeCameraWithoutNotifying(used_ids_.back());
used_ids_.pop_back();
}
// mojom::VideoCaptureService:
void InjectGpuDependencies(
mojo::PendingRemote<video_capture::mojom::AcceleratorFactory>
accelerator_factory) override {}
void ConnectToCameraAppDeviceBridge(
mojo::PendingReceiver<cros::mojom::CameraAppDeviceBridge> receiver)
override {}
void BindVideoCaptureDeviceFactory(
mojo::PendingReceiver<crosapi::mojom::VideoCaptureDeviceFactory> receiver)
override {}
void ConnectToVideoSourceProvider(
mojo::PendingReceiver<video_capture::mojom::VideoSourceProvider> receiver)
override {
fake_provider_.Bind(std::move(receiver));
}
void BindControlsForTesting(
mojo::PendingReceiver<video_capture::mojom::TestingControls> receiver)
override {}
private:
FakeVideoSourceProvider fake_provider_;
std::vector<std::string> used_ids_;
int next_id_{0};
};
class CameraPresenceNotifierTest : public testing::Test {
public:
CameraPresenceNotifierTest() = default;
CameraPresenceNotifierTest(const CameraPresenceNotifierTest&) = delete;
CameraPresenceNotifierTest& operator=(const CameraPresenceNotifierTest&) =
delete;
~CameraPresenceNotifierTest() override = default;
void AddFakeCamera() { fake_service_.AddFakeCamera(); }
void RemoveFakeCamera() { fake_service_.RemoveFakeCamera(); }
// Advances time past the poll interval.
void StepClock() { task_environment_.FastForwardBy(base::Seconds(10)); }
// testing::Test:
void SetUp() override {
content::OverrideVideoCaptureServiceForTesting(&fake_service_);
}
void TearDown() override {
content::OverrideVideoCaptureServiceForTesting(nullptr);
}
private:
content::BrowserTaskEnvironment task_environment_{
base::test::TaskEnvironment::TimeSource::MOCK_TIME};
FakeVideoCaptureService fake_service_;
};
// Tests that the observer of CameraPresenceNotifier works correctly when the
// camera is added/removed (using the presence callback).
TEST_F(CameraPresenceNotifierTest, TestPresenceObserver) {
std::vector<bool> values;
CameraPresenceNotifier::CameraPresenceCallback callback = base::BindRepeating(
[](std::vector<bool>* values, bool camera_is_present) {
values->push_back(camera_is_present);
},
&values);
CameraPresenceNotifier notifier(callback);
// No events before start.
ASSERT_TRUE(values.empty());
notifier.Start();
StepClock();
// The first result should be false since there are no available cameras.
ASSERT_EQ(1U, values.size());
EXPECT_FALSE(values.back());
// Advance clock to verify that unchanged values don't cause callbacks.
StepClock();
ASSERT_EQ(1U, values.size());
// Add a camera.
AddFakeCamera();
StepClock();
ASSERT_EQ(2U, values.size());
// There is a camera now.
EXPECT_TRUE(values.back());
// Camera removed. Next callback is false again.
RemoveFakeCamera();
StepClock();
ASSERT_EQ(3U, values.size());
EXPECT_FALSE(values.back());
}
// Tests that the observer of CameraPresenceNotifier works correctly when the
// cameras are added/removed (using the count callback).
TEST_F(CameraPresenceNotifierTest, TestCountObserver) {
std::vector<int> values;
CameraPresenceNotifier::CameraCountCallback callback = base::BindRepeating(
[](std::vector<int>* values, int camera_count) {
values->push_back(camera_count);
},
&values);
CameraPresenceNotifier notifier(callback);
// No events before start.
ASSERT_TRUE(values.empty());
notifier.Start();
StepClock();
// The first result should be 0 since there are no available cameras.
ASSERT_EQ(1U, values.size());
EXPECT_EQ(0, values.back());
// Advance clock to verify that unchanged values don't cause callbacks.
StepClock();
ASSERT_EQ(1U, values.size());
// Add a camera.
AddFakeCamera();
StepClock();
ASSERT_EQ(2U, values.size());
// There is a camera now.
EXPECT_EQ(1, values.back());
// Camera removed.
RemoveFakeCamera();
StepClock();
ASSERT_EQ(3U, values.size());
EXPECT_EQ(0, values.back());
// Add 1 camera.
AddFakeCamera();
StepClock();
ASSERT_EQ(4U, values.size());
EXPECT_EQ(1, values.back());
// Add 2nd camera.
AddFakeCamera();
StepClock();
ASSERT_EQ(5U, values.size());
EXPECT_EQ(2, values.back());
// Remove 2nd camera
RemoveFakeCamera();
StepClock();
ASSERT_EQ(6U, values.size());
EXPECT_EQ(1, values.back());
// Remove 1st camera
RemoveFakeCamera();
StepClock();
ASSERT_EQ(7U, values.size());
EXPECT_EQ(0, values.back());
}
} // namespace ash
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