+# Make a directory for the output images
+
rm_and_mkdir ./tri-out
-apitrace dump-images -o ./tri-out/tri tri.trace
+
+# Generate images for every frame (only 1) of a trace
+
+apitrace dump-images --call-nos=no -o ./tri-out/tri tri.trace
+
+# Compare the result of "apitrace dump-images" with our reference
+
apitrace diff-images -v ./tri-ref ./tri-out
-expect "Comparing ./tri-ref/tri0000000027.png and ./tri-out/tri0000000027.png ... MATCH\n"
+
+# Ensure that the "apitrace diff-images" actually did something. This
+# is important since if it couldn't find images in one directory or
+# the other then it would just silently return 0 and this test would
+# incorrectly pass.
+
+expect "Comparing ./tri-ref/tri0000000000.png and ./tri-out/tri0000000000.png ... MATCH\n"