[test] Fix infinite loop when we run out of input

d6930c7 introduced Status.INPUT_END but didn't introduce the means
to handle that eventuality. It looks like the intention might have been
to exit with success if we've got to the end of input.
However, if we run out of input and still have matches pending, I'm
treating this as a failure

Author: ldrumm

cmake/match.py

@@ -93,6 +93,18 @@ def main():
             print_incorrect_match(match_idx + 1, input_lines[input_idx].strip(), "");
             print_content(input_lines, match_lines, ignored_lines)
             sys.exit(1)
+        elif status == Status.INPUT_END:
+        # If we get to the end of the input, but still have pending matches,
+        # then that's a failure unless all pending matches are optional -
+        # otherwise we're done
+            while match_idx < len(match_lines):
+                if not (match_lines[match_idx].startswith(Tag.OPT.value) or
+                        match_lines[match_idx].startswith(Tag.IGNORE.value)):
+                    print_incorrect_match(match_idx + 1, "", match_lines[match_idx]);
+                    print_content(input_lines, match_lines, ignored_lines)
+                    sys.exit(1)
+                match_idx += 1
+            sys.exit(0)
 
         input_line = input_lines[input_idx].strip() if input_idx < len(input_lines) else ""
         match_line = match_lines[match_idx]