[PATCH 5/8] test-run-command: Increase test coverage

[Stefan Beller <sbeller@google.com>]

Currently we have exact 4 jobs to be run with at most 4 parallel
processes. This sounds as if we're testing only one special case,
but in reality we want to have any number of tasks be processed
successfully, so test:
* more tasks than max jobs (implying slots get reused)
* equal number of jobs and max jobs
* less tasks than max jobs (implying there are unused slots)

Signed-off-by: Stefan Beller <sbeller@google.com>
---
 t/t0061-run-command.sh | 16 +++++++++++++---
 test-run-command.c     | 14 +++++++++-----
 2 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/t/t0061-run-command.sh b/t/t0061-run-command.sh
index 0af77cd..f27ada7 100755
--- a/t/t0061-run-command.sh
+++ b/t/t0061-run-command.sh
@@ -62,8 +62,18 @@ Hello
 World
 EOF
 
-test_expect_success 'run_command runs in parallel' '
-	test-run-command run-command-parallel-4 sh -c "printf \"%s\n%s\n\" Hello World" 2>actual &&
+test_expect_success 'run_command runs in parallel with more jobs available than tasks' '
+	test-run-command run-command-parallel 5 sh -c "printf \"%s\n%s\n\" Hello World" 2>actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'run_command runs in parallel with as many jobs as tasks' '
+	test-run-command run-command-parallel 4 sh -c "printf \"%s\n%s\n\" Hello World" 2>actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'run_command runs in parallel with more tasks than jobs available' '
+	test-run-command run-command-parallel 3 sh -c "printf \"%s\n%s\n\" Hello World" 2>actual &&
 	test_cmp expect actual
 '
 
@@ -77,7 +87,7 @@ asking for a quick stop
 EOF
 
 test_expect_success 'run_command is asked to abort gracefully' '
-	test-run-command run-command-abort-3 false 2>actual &&
+	test-run-command run-command-abort 3 false 2>actual &&
 	test_cmp expect actual
 '
 
diff --git a/test-run-command.c b/test-run-command.c
index 4b59482..c8770c2 100644
--- a/test-run-command.c
+++ b/test-run-command.c
@@ -47,10 +47,11 @@ static int task_finished(int result,
 int main(int argc, char **argv)
 {
 	struct child_process proc = CHILD_PROCESS_INIT;
+	int jobs;
 
 	if (argc < 3)
 		return 1;
-	proc.argv = (const char **)argv+2;
+	proc.argv = (const char **)argv + 2;
 
 	if (!strcmp(argv[1], "start-command-ENOENT")) {
 		if (start_command(&proc) < 0 && errno == ENOENT)
@@ -61,12 +62,15 @@ int main(int argc, char **argv)
 	if (!strcmp(argv[1], "run-command"))
 		exit(run_command(&proc));
 
-	if (!strcmp(argv[1], "run-command-parallel-4"))
-		exit(run_processes_parallel(4, parallel_next,
+	jobs = atoi(argv[2]);
+	proc.argv = (const char **)argv + 3;
+
+	if (!strcmp(argv[1], "run-command-parallel"))
+		exit(run_processes_parallel(jobs, parallel_next,
 					    NULL, NULL, &proc));
 
-	if (!strcmp(argv[1], "run-command-abort-3"))
-		exit(run_processes_parallel(3, parallel_next,
+	if (!strcmp(argv[1], "run-command-abort"))
+		exit(run_processes_parallel(jobs, parallel_next,
 					    NULL, task_finished, &proc));
 
 	fprintf(stderr, "check usage\n");
-- 
2.5.0.275.gbfc1651.dirty