[PATCH 4/4] t5504: handle expected output from SIGPIPE death

[Jeff King <peff@peff.net>]

Commit 8bf4bec (add "ok=sigpipe" to test_must_fail and use
it to fix flaky tests, 2015-11-27) taught t5504 to handle
"git push" racily exiting with SIGPIPE rather than failing.

However, one of the tests checks the output of the command,
as well. In the SIGPIPE case, we will not have produced any
output. If we want the test to be truly non-flaky, we have
to accept either output.

Signed-off-by: Jeff King <peff@peff.net>
---
I'm not sure we're really accomplishing anything with this test_cmp
anymore. We'll complain only if we get _some_ output, and it's not the
expected output. I'm not sure if that's actually useful.

It looks like 8bf4bec just dropped the test_cmp completely in one of the
cases. So an alternative here would be to do the same.

We _could_ also tighten this, to make sure the output matches the exit
code we got (right now we can get code=128 with blank output and not
complain, even though that's clearly bogus). But we'd have to abandon
test_must_fail and do things manually.

 t/t5504-fetch-receive-strict.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/t/t5504-fetch-receive-strict.sh b/t/t5504-fetch-receive-strict.sh
index 89224ed..a3e12d2 100755
--- a/t/t5504-fetch-receive-strict.sh
+++ b/t/t5504-fetch-receive-strict.sh
@@ -101,7 +101,10 @@ test_expect_success 'push with receive.fsckobjects' '
 		git config transfer.fsckobjects false
 	) &&
 	test_must_fail ok=sigpipe git push --porcelain dst master:refs/heads/test >act &&
-	test_cmp exp act
+	{
+		test_cmp exp act ||
+		! test -s act
+	}
 '
 
 test_expect_success 'push with transfer.fsckobjects' '
-- 
2.7.2.645.g4e1306c