Package video capture skeleton as Mojo Shell Service

services/video_capture/service_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/memory/ref_counted.h"
+#include "base/run_loop.h"
+#include "services/shell/public/cpp/service_test.h"
+#include "services/video_capture/public/interfaces/video_capture_device_factory.mojom.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+using testing::Exactly;
+using testing::_;
+
+namespace video_capture {
+
+ACTION_P(RunClosure, closure) {
+  closure.Run();
+}
+
+class MockClient {
+ public:
+  // Use forwarding method to work around gmock not supporting move-only types.
+  void HandleEnumerateDeviceDescriptorsCallback(
+      std::vector<mojom::VideoCaptureDeviceDescriptorPtr> descriptors) {
+    OnEnumerateDeviceDescriptorsCallback(descriptors);
+  }
+
+  MOCK_METHOD1(
+      OnEnumerateDeviceDescriptorsCallback,
+      void(const std::vector<mojom::VideoCaptureDeviceDescriptorPtr>&));
+};
+
+class VideoCaptureServiceTest : public shell::test::ServiceTest {
+ public:
+  VideoCaptureServiceTest()
+      : shell::test::ServiceTest("exe:video_capture_unittests") {}
+  ~VideoCaptureServiceTest() override {}
+
+  void SetUp() override {
+    ServiceTest::SetUp();
+    connector()->ConnectToInterface("mojo:video_capture", &factory_);
+  }
+
+ protected:
+  mojom::VideoCaptureDeviceFactoryPtr factory_;
+  MockClient client_;
+};
+
+// Tests that an answer arrives from the service when calling
+// EnumerateDeviceDescriptors().
+TEST_F(VideoCaptureServiceTest, EnumerateDeviceDescriptorsCallbackArrives) {
+  base::RunLoop wait_loop;
+  EXPECT_CALL(client_, OnEnumerateDeviceDescriptorsCallback(_))
+      .Times(Exactly(1))
+      .WillOnce(RunClosure(wait_loop.QuitClosure()));
+
+  factory_->EnumerateDeviceDescriptors(
+      base::Bind(&MockClient::HandleEnumerateDeviceDescriptorsCallback,
+                 base::Unretained(&client_)));
+  wait_loop.Run();
+}
+
+}  // namespace video_capture