Re: [PATCH] test-lib: save test counts across invocations

Thomas Rast [off-list ref] writes:

Save the number of tests run ($test_count) in a file under
test-counts/.  Then when sourcing test-lib.sh the next time, compare
the timestamps.

... which is this logic ...

+test_count_file="$TEST_DIRECTORY"/test-counts/$(basename "$0" .sh)
+test_count_saved=$(
+	if [ -n "$test_disable_saved_count" ]; then
+		:
+	# the saved count is only valid if the file is newer than the test
+	elif [ -f "$test_count_file" -a "$test_count_file" -nt "$0" ]; then
+		cat "$test_count_file" 2>/dev/null
+	fi
+	# otherwise we leave the variable empty
+)

I think the patch is cute, but I however do not think this is sufficient
to catch prerequisite changes, unfortunately. I'd rather leave the total
unknown than giving incorrect numbers.