Video Capture Mojo (1.4c): Handle Subsequent Access

services/video_capture/fake_device_descriptor_unittest.cc

+// Copyright 2016 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/run_loop.h"
+#include "services/video_capture/fake_device_descriptor_test.h"
+#include "services/video_capture/mock_video_capture_device_client.h"
+
+using testing::_;
+using testing::InvokeWithoutArgs;
+
+namespace video_capture {
+
+class MockCreateDeviceProxyCallback {
+ public:
+  MOCK_METHOD1(Run, void(mojom::DeviceAccessResultCode result_code));
+};
+
+// Tests that when requesting a second proxy for a device without closing the
+// first one, the service revokes access to the first one by closing the
+// connection.
+TEST_F(FakeDeviceDescriptorTest, AccessIsRevokedOnSecondAccess) {
+  mojom::VideoCaptureDeviceProxyPtr device_proxy_1;
+  bool device_access_1_revoked = false;
+  MockCreateDeviceProxyCallback create_device_proxy_callback_1;
+  EXPECT_CALL(create_device_proxy_callback_1,
+              Run(mojom::DeviceAccessResultCode::SUCCESS))
+      .Times(1);
+  factory_->CreateDeviceProxy(
+      fake_device_descriptor_->Clone(), mojo::GetProxy(&device_proxy_1),
+      base::Bind(&MockCreateDeviceProxyCallback::Run,
+                 base::Unretained(&create_device_proxy_callback_1)));
+  device_proxy_1.set_connection_error_handler(
+      base::Bind([](bool* access_revoked) { *access_revoked = true; },
+                 &device_access_1_revoked));
+
+  base::RunLoop wait_loop;
+  mojom::VideoCaptureDeviceProxyPtr device_proxy_2;
+  bool device_access_2_revoked = false;
+  MockCreateDeviceProxyCallback create_device_proxy_callback_2;
+  EXPECT_CALL(create_device_proxy_callback_2,
+              Run(mojom::DeviceAccessResultCode::SUCCESS))
+      .Times(1)
+      .WillOnce(InvokeWithoutArgs([&wait_loop]() { wait_loop.Quit(); }));
+  factory_->CreateDeviceProxy(
+      fake_device_descriptor_->Clone(), mojo::GetProxy(&device_proxy_2),
+      base::Bind(&MockCreateDeviceProxyCallback::Run,
+                 base::Unretained(&create_device_proxy_callback_2)));
+  device_proxy_2.set_connection_error_handler(
+      base::Bind([](bool* access_revoked) { *access_revoked = true; },
+                 &device_access_2_revoked));
+  wait_loop.Run();
+  ASSERT_TRUE(device_access_1_revoked);
+  ASSERT_FALSE(device_access_2_revoked);
+}
+
+// Tests that a second proxy requested for a device can be used successfully.
+TEST_F(FakeDeviceDescriptorTest, CanUseSecondRequestedProxy) {
+  mojom::VideoCaptureDeviceProxyPtr device_proxy_1;
+  factory_->CreateDeviceProxy(
+      fake_device_descriptor_->Clone(), mojo::GetProxy(&device_proxy_1),
+      base::Bind([](mojom::DeviceAccessResultCode result_code) {}));
+
+  base::RunLoop wait_loop;
+  mojom::VideoCaptureDeviceProxyPtr device_proxy_2;
+  factory_->CreateDeviceProxy(
+      fake_device_descriptor_->Clone(), mojo::GetProxy(&device_proxy_2),
+      base::Bind(
+          [](base::RunLoop* wait_loop,
+             mojom::DeviceAccessResultCode result_code) { wait_loop->Quit(); },
+          &wait_loop));
+  wait_loop.Run();
+
+  auto arbitrary_requested_format = mojom::VideoCaptureFormat::New();
+  arbitrary_requested_format->frame_size.SetSize(640, 480);
+  arbitrary_requested_format->frame_rate = 15;
+  arbitrary_requested_format->pixel_format = media::mojom::VideoFormat::I420;
+  arbitrary_requested_format->pixel_storage = mojom::VideoPixelStorage::CPU;
+
+  base::RunLoop wait_loop_2;
+  mojom::VideoCaptureDeviceClientPtr client_proxy;
+  MockVideoCaptureDeviceClient client(mojo::GetProxy(&client_proxy));
+  EXPECT_CALL(client, OnFrameAvailablePtr(_))
+      .WillRepeatedly(
+          InvokeWithoutArgs([&wait_loop_2]() { wait_loop_2.Quit(); }));
+
+  device_proxy_2->Start(std::move(arbitrary_requested_format),
+                        mojom::ResolutionChangePolicy::FIXED_RESOLUTION,
+                        mojom::PowerLineFrequency::DEFAULT,
+                        std::move(client_proxy));
+  wait_loop_2.Run();
+}
+
+}  // namespace video_capture