Allow FakeVideoCaptureDeviceFactory to specify number of supported formats per device.

media/capture/video/fake_video_capture_device_unittest.cc

 // Copyright 2014 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 "media/capture/video/fake_video_capture_device.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 477 matching lines @@
                  image_capture_client_));
 
   EXPECT_CALL(*image_capture_client_.get(), OnCorrectPhotoTaken()).Times(1);
   device->TakePhoto(std::move(scoped_callback));
 
   run_loop_.reset(new base::RunLoop());
   run_loop_->Run();
   device->StopAndDeAllocate();
 }
 
+TEST_F(FakeVideoCaptureDeviceTest, ZeroFormats) {
+  base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
+      switches::kUseFakeDeviceForMediaStream, "device-count=2,format-count=0");
+  std::unique_ptr<VideoCaptureDeviceDescriptors> descriptors(
+      EnumerateDevices());
+  ASSERT_EQ(2u, descriptors->size());
+  for (const auto& descriptor : *descriptors) {
+    VideoCaptureFormats supported_formats;
+    video_capture_device_factory_->GetSupportedFormats(descriptor,
+                                                       &supported_formats);
+    EXPECT_EQ(0u, supported_formats.size());
+  }
+}
+
 TEST_P(FakeVideoCaptureDeviceCommandLineTest, FrameRateAndDeviceCount) {
   base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
       switches::kUseFakeDeviceForMediaStream, GetParam().argument);
   const std::unique_ptr<VideoCaptureDeviceDescriptors> descriptors(
       EnumerateDevices());
   EXPECT_EQ(descriptors->size(), GetParam().device_count);
   ASSERT_FALSE(descriptors->empty());
 
   for (const auto& descriptors_iterator : *descriptors) {
     std::unique_ptr<VideoCaptureDevice> device =
@@ skipping 15 matching lines @@
 INSTANTIATE_TEST_CASE_P(
     ,
     FakeVideoCaptureDeviceCommandLineTest,
     Values(CommandLineTestData{"fps=-1", 5, 1u},
            CommandLineTestData{"fps=29.97, device-count=1", 29.97f, 1u},
            CommandLineTestData{"fps=60, device-count=2", 60, 2u},
            CommandLineTestData{"fps=1000, device-count=-1", 60, 1u},
            CommandLineTestData{"device-count=2", 20, 2u},
            CommandLineTestData{"device-count=0", 20, 1u}));
 };  // namespace media