Add "exact" constraint evaluation to video picker.

content/renderer/media/media_stream_video_source_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 <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 296 matching lines @@
 TEST_F(MediaStreamVideoSourceTest, MandatoryMinVgaOptional720P) {
   MockConstraintFactory factory;
   factory.basic().width.setMin(640);
   factory.basic().height.setMin(480);
   factory.AddAdvanced().width.setMin(1280);
   factory.AddAdvanced().aspectRatio.setMin(1280.0 / 720);
 
   CreateTrackAndStartSource(factory.CreateWebMediaConstraints(), 1280, 720, 30);
 }
 
+// Test that the capture output is 720P if the camera supports it and the
+// mandatory constraint is exactly width 1280.
+TEST_F(MediaStreamVideoSourceTest, MandatoryExact720P) {
+  MockConstraintFactory factory;
+  factory.basic().width.setExact(1280);
+  CreateTrackAndStartSource(factory.CreateWebMediaConstraints(), 1280, 720, 30);
+}
+
 // Test that the capture output have aspect ratio 4:3 if a mandatory constraint
 // require it even if an optional constraint request a higher resolution
 // that don't have this aspect ratio.
 TEST_F(MediaStreamVideoSourceTest, MandatoryAspectRatio4To3) {
   MockConstraintFactory factory;
   factory.basic().width.setMin(640);
   factory.basic().height.setMin(480);
   factory.basic().aspectRatio.setMax(640.0 / 480);
   factory.AddAdvanced().width.setMin(1280);
 
@@ skipping 39 matching lines @@
   blink::WebMediaStreamTrack track = CreateTrack(
       "123", factory.CreateWebMediaConstraints());
   mock_source()->CompleteGetSupportedFormats();
   EXPECT_EQ(1, NumberOfFailedConstraintsCallbacks());
 }
 
 TEST_F(MediaStreamVideoSourceTest, MinFrameRateLargerThanMaxFrameRate) {
   MockConstraintFactory factory;
   factory.basic().frameRate.setMin(25);
   factory.basic().frameRate.setMax(15);
-  blink::WebMediaStreamTrack track = CreateTrack(
-      "123", factory.CreateWebMediaConstraints());
+  blink::WebMediaStreamTrack track =
+      CreateTrack("123", factory.CreateWebMediaConstraints());
   mock_source()->CompleteGetSupportedFormats();
   EXPECT_EQ(1, NumberOfFailedConstraintsCallbacks());
 }
+
+TEST_F(MediaStreamVideoSourceTest, ExactWidthNotSupported) {
+  MockConstraintFactory factory;
+  factory.basic().width.setExact(12000);
+  blink::WebMediaStreamTrack track =
+      CreateTrack("123", factory.CreateWebMediaConstraints());
+  mock_source()->CompleteGetSupportedFormats();
+  EXPECT_EQ(1, NumberOfFailedConstraintsCallbacks());
+}
+
+TEST_F(MediaStreamVideoSourceTest, MinWidthNotSupported) {
+  MockConstraintFactory factory;
+  factory.basic().width.setMin(12000);
+  blink::WebMediaStreamTrack track =
+      CreateTrack("123", factory.CreateWebMediaConstraints());
+  mock_source()->CompleteGetSupportedFormats();
+  EXPECT_EQ(1, NumberOfFailedConstraintsCallbacks());
+}
 
 // Test that its safe to release the last reference of a blink track and the
 // source during the callback if adding a track succeeds.
 TEST_F(MediaStreamVideoSourceTest, ReleaseTrackAndSourceOnSuccessCallBack) {
   MockConstraintFactory factory;
   {
     blink::WebMediaStreamTrack track =
         CreateTrack("123", factory.CreateWebMediaConstraints());
     ReleaseTrackAndSourceOnAddTrackCallback(track);
   }
@@ skipping 359 matching lines @@
   run_loop2.Run();
 
   EXPECT_EQ(muted_state, false);
   EXPECT_EQ(track.source().getReadyState(),
             blink::WebMediaStreamSource::ReadyStateLive);
 
   sink.DisconnectFromTrack();
 }
 
 }  // namespace content