iOS AppRTCMobile: Fix SDP video codec reordering for multiple H264 profiles

webrtc/examples/objc/AppRTCMobile/tests/ARDAppClientTest.mm

Index: webrtc/examples/objc/AppRTCMobile/tests/ARDAppClientTest.mm
diff --git a/webrtc/examples/objc/AppRTCMobile/tests/ARDAppClientTest.mm b/webrtc/examples/objc/AppRTCMobile/tests/ARDAppClientTest.mm
index 20a5cf481ea26ef318c838b80002696fbb5ebeca..049828337f974fdcd649dcbf9f3f6fdd960c885d 100644
--- a/webrtc/examples/objc/AppRTCMobile/tests/ARDAppClientTest.mm
+++ b/webrtc/examples/objc/AppRTCMobile/tests/ARDAppClientTest.mm
@@ -360,10 +360,12 @@ static NSInteger kARDAppClientTestsExpectationTimeoutError = 100;
 @implementation ARDSDPUtilsTest
 

[daniela-webrtc, 2016/11/21 16:23:00]

Perhaps few more tests can be added.
For instance one for the use case when the m=video string is missing, and few to
actually test the order of the preferred codecs.

[magjed_webrtc, 2016/11/22 14:40:24]

Done, I added some more tests.

 - (void)testPreferVideoCodec {
-  NSString *sdp = @("m=video 9 RTP/SAVPF 100 116 117 96 120\n"
-                    "a=rtpmap:120 H264/90000\n");
-  NSString *expectedSdp = @("m=video 9 RTP/SAVPF 120 100 116 117 96\n"
-                            "a=rtpmap:120 H264/90000\n");
+  NSString *sdp = @("m=video 9 RTP/SAVPF 100 116 117 96 120 97\n"
+                    "a=rtpmap:120 H264/90000\n"
+                    "a=rtpmap:97 H264/90000\n");
+  NSString *expectedSdp = @("m=video 9 RTP/SAVPF 120 97 100 116 117 96\n"
+                            "a=rtpmap:120 H264/90000\n"
+                            "a=rtpmap:97 H264/90000\n");
   RTCSessionDescription* desc =
       [[RTCSessionDescription alloc] initWithType:RTCSdpTypeOffer sdp:sdp];
   RTCSessionDescription *h264Desc =