| Testing the VolumeSupport behavior by using the media API to mute. | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PASS mediaController.controls.volumeSlider.value is 1 | |
| PASS mediaController.controls.volumeSlider.value is 0 | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |