[PATCH v3 2/3] t1503: use test_must_be_empty

[David Aguilar <davvid@gmail.com>]

Use `test_must_be_be_empty <file>` instead of `test -z "$(cat <file>)"`.

Suggested-by: Fabian Ruch <bafain@gmail.com>
Signed-off-by: David Aguilar <davvid@gmail.com>
---
Unchanged since last time, but rebased for the change in the
previous patch.

 t/t1503-rev-parse-verify.sh | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/t/t1503-rev-parse-verify.sh b/t/t1503-rev-parse-verify.sh
index fd9d0c3..4fe9f0e 100755
--- a/t/t1503-rev-parse-verify.sh
+++ b/t/t1503-rev-parse-verify.sh
@@ -72,15 +72,15 @@ test_expect_success 'fails with any bad rev or many good revs' '
 
 test_expect_success 'fails silently when using -q' '
 	test_must_fail git rev-parse --verify --quiet 2>error &&
-	test -z "$(cat error)" &&
+	test_must_be_empty error &&
 	test_must_fail git rev-parse -q --verify foo 2>error &&
-	test -z "$(cat error)" &&
+	test_must_be_empty error &&
 	test_must_fail git rev-parse --verify -q HEAD bar 2>error &&
-	test -z "$(cat error)" &&
+	test_must_be_empty error &&
 	test_must_fail git rev-parse --quiet --verify baz HEAD 2>error &&
-	test -z "$(cat error)" &&
+	test_must_be_empty error &&
 	test_must_fail git rev-parse -q --verify $HASH2 HEAD 2>error &&
-	test -z "$(cat error)"
+	test_must_be_empty error
 '
 
 test_expect_success 'fails silently when using -q with deleted reflogs' '
@@ -89,7 +89,7 @@ test_expect_success 'fails silently when using -q with deleted reflogs' '
 	git update-ref -m "reflog message for refs/test" refs/test "$ref" &&
 	git reflog delete --updateref --rewrite refs/test@{0} &&
 	test_must_fail git rev-parse -q --verify refs/test@{0} >error 2>&1 &&
-	test -z "$(cat error)"
+	test_must_be_empty error
 '
 
 test_expect_success 'no stdout output on error' '
-- 
2.1.0.30.g05c535b.dirty