benchmark mode command-line option

Well-written clar tests (those that clean up after themselves) are
capable of running in benchmark mode. Provide it as an option.

Author: ethomson

clar.c

@@ -505,6 +505,7 @@ clar_usage(const char *arg)
 	printf("  -q            Only report tests that had an error\n");
 	printf("  -Q            Quit as soon as a test fails\n");
 	printf("  -t            Display results in tap format\n");
+	printf("  -b            Run in benchmark mode, displaying times\n");
 	printf("  -l            Print suite names\n");
 	printf("  -r[filename]  Write summary file (to the optional filename)\n");
 	exit(1);
@@ -611,6 +612,15 @@ clar_parse_args(int argc, char **argv)
 			_clar.output_format = CL_OUTPUT_TAP;
 			break;
 
+		case 'b':
+			if (argument[2] != '\0')
+				clar_usage(argv[0]);
+
+			_clar.test_mode = CL_TEST_BENCHMARK;
+			_clar.output_format = CL_OUTPUT_TIMING;
+			_clar.summary_format = CL_SUMMARY_JSON;
+			break;
+
 		case 'l': {
 			size_t j;
 

test/expected/help

@@ -8,5 +8,6 @@ Options:
   -q            Only report tests that had an error
   -Q            Quit as soon as a test fails
   -t            Display results in tap format
+  -b            Run in benchmark mode, displaying times
   -l            Print suite names
   -r[filename]  Write summary file (to the optional filename)