1 Test that drawImage() does nothing with an incomplete image or video
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS ctx.drawImage(img, 0, 0) is undefined
10 PASS imgdata[3] is 255
11 PASS ctx.drawImage(video, 0, 0) is undefined
12 PASS imgdata[0] is 255
15 PASS imgdata[3] is 255
16 PASS successfullyParsed is true