EXPECT_FAILURE: apitrace diff-images --verbose images/white-1x1/ images/black-1x1/ # In addition to getting the return value indicating an error, let's # also require that "apitrace diff-images" gave us the output we # expect. expect "Comparing images/white-1x1/0.png and images/black-1x1/0.png ... MISMATCH\n"