Queue commands to the Os to start a video device.

content/browser/renderer_host/media/video_capture_manager_unittest.cc

 // Copyright (c) 2012 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.
 
 // Unit test for VideoCaptureManager.
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
@@ skipping 158 matching lines @@
   VideoCaptureControllerID client_id = StartClient(video_session_id, true);
 
   StopClient(client_id);
   vcm_->Close(video_session_id);
 
   // Wait to check callbacks before removing the listener.
   message_loop_->RunUntilIdle();
   vcm_->Unregister();
 }
 
+TEST_F(VideoCaptureManagerTest, CreateAndCloseMultipleTimes) {
+  StreamDeviceInfoArray devices;
+
+  InSequence s;
+  EXPECT_CALL(*listener_, DevicesEnumerated(MEDIA_DEVICE_VIDEO_CAPTURE, _))
+      .WillOnce(SaveArg<1>(&devices));
+
+  vcm_->EnumerateDevices(MEDIA_DEVICE_VIDEO_CAPTURE);
+
+  // Wait to get device callback.
+  message_loop_->RunUntilIdle();
+
+  for (int i = 1 ; i < 3 ; ++i) {
+    EXPECT_CALL(*listener_, Opened(MEDIA_DEVICE_VIDEO_CAPTURE, i));
+    EXPECT_CALL(*listener_, Closed(MEDIA_DEVICE_VIDEO_CAPTURE, i));
+    int video_session_id = vcm_->Open(devices.front());
+    VideoCaptureControllerID client_id = StartClient(video_session_id, true);
+
+    StopClient(client_id);
+    vcm_->Close(video_session_id);
+  }
+
+  // Wait to check callbacks before removing the listener.
+  message_loop_->RunUntilIdle();
+  vcm_->Unregister();
+}
+
 // Try to open, start, and abort a device.
 TEST_F(VideoCaptureManagerTest, CreateAndAbort) {
   StreamDeviceInfoArray devices;
 
   InSequence s;
   EXPECT_CALL(*listener_, DevicesEnumerated(MEDIA_DEVICE_VIDEO_CAPTURE, _))
       .WillOnce(SaveArg<1>(&devices));
   EXPECT_CALL(*listener_, Opened(MEDIA_DEVICE_VIDEO_CAPTURE, _));
   EXPECT_CALL(*listener_, Aborted(MEDIA_DEVICE_VIDEO_CAPTURE, _));
 
@@ skipping 294 matching lines @@
 
   // Wait to check callbacks before removing the listener
   message_loop_->RunUntilIdle();
   vcm_->Unregister();
 }
 
 // TODO(mcasas): Add a test to check consolidation of the supported formats
 // provided by the device when http://crbug.com/323913 is closed.
 
 }  // namespace content