[PATCH v2 3/8] run-command tests: test stdout of run_command_parallel()

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Extend the tests added in c553c72eed6 (run-command: add an
asynchronous parallel child processor, 2015-12-15) to test stdout in
addition to stderr. A subsequent commit will add additional related
tests for a new feature, making it obvious how the output of the two
compares on both stdout and stderr will make this easier to reason
about.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 t/t0061-run-command.sh | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/t/t0061-run-command.sh b/t/t0061-run-command.sh
index ee281909bc3..7d00f3cc2af 100755
--- a/t/t0061-run-command.sh
+++ b/t/t0061-run-command.sh
@@ -130,18 +130,21 @@ World
 EOF
 
 test_expect_success 'run_command runs in parallel with more jobs available than tasks' '
-	test-tool run-command run-command-parallel 5 sh -c "printf \"%s\n%s\n\" Hello World" 2>actual &&
-	test_cmp expect actual
+	test-tool run-command run-command-parallel 5 sh -c "printf \"%s\n%s\n\" Hello World" >out 2>err &&
+	test_must_be_empty out &&
+	test_cmp expect err
 '
 
 test_expect_success 'run_command runs in parallel with as many jobs as tasks' '
-	test-tool run-command run-command-parallel 4 sh -c "printf \"%s\n%s\n\" Hello World" 2>actual &&
-	test_cmp expect actual
+	test-tool run-command run-command-parallel 4 sh -c "printf \"%s\n%s\n\" Hello World" >out 2>err &&
+	test_must_be_empty out &&
+	test_cmp expect err
 '
 
 test_expect_success 'run_command runs in parallel with more tasks than jobs available' '
-	test-tool run-command run-command-parallel 3 sh -c "printf \"%s\n%s\n\" Hello World" 2>actual &&
-	test_cmp expect actual
+	test-tool run-command run-command-parallel 3 sh -c "printf \"%s\n%s\n\" Hello World" >out 2>err &&
+	test_must_be_empty out &&
+	test_cmp expect err
 '
 
 cat >expect <<-EOF
@@ -154,8 +157,9 @@ asking for a quick stop
 EOF
 
 test_expect_success 'run_command is asked to abort gracefully' '
-	test-tool run-command run-command-abort 3 false 2>actual &&
-	test_cmp expect actual
+	test-tool run-command run-command-abort 3 false >out 2>err &&
+	test_must_be_empty out &&
+	test_cmp expect err
 '
 
 cat >expect <<-EOF
@@ -163,8 +167,9 @@ no further jobs available
 EOF
 
 test_expect_success 'run_command outputs ' '
-	test-tool run-command run-command-no-jobs 3 sh -c "printf \"%s\n%s\n\" Hello World" 2>actual &&
-	test_cmp expect actual
+	test-tool run-command run-command-no-jobs 3 sh -c "printf \"%s\n%s\n\" Hello World" >out 2>err &&
+	test_must_be_empty out &&
+	test_cmp expect err
 '
 
 test_trace () {
-- 
2.36.1.952.g0ae626f6cd7