t1401-symbolic-ref: avoid direct filesystem access

Use symbolic-ref and rev-parse to inspect refs.

Signed-off-by: Han-Wen Nienhuys <[email protected]>
Reviewed-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: hanwen

t/t1401-symbolic-ref.sh

@@ -17,27 +17,23 @@ test_expect_success 'setup' '
 	"$TAR" cf .git.tar .git/
 '
 
-test_expect_success 'symbolic-ref writes HEAD' '
-	git symbolic-ref HEAD refs/heads/foo &&
-	echo ref: refs/heads/foo >expect &&
-	test_cmp expect .git/HEAD
-'
-
-test_expect_success 'symbolic-ref reads HEAD' '
-	echo refs/heads/foo >expect &&
+test_expect_success 'symbolic-ref read/write roundtrip' '
+	git symbolic-ref HEAD refs/heads/read-write-roundtrip &&
+	echo refs/heads/read-write-roundtrip >expect &&
 	git symbolic-ref HEAD >actual &&
 	test_cmp expect actual
 '
 
 test_expect_success 'symbolic-ref refuses non-ref for HEAD' '
 	test_must_fail git symbolic-ref HEAD foo
 '
+
 reset_to_sane
 
 test_expect_success 'symbolic-ref refuses bare sha1' '
-	echo content >file && git add file && git commit -m one &&
 	test_must_fail git symbolic-ref HEAD $(git rev-parse HEAD)
 '
+
 reset_to_sane
 
 test_expect_success 'HEAD cannot be removed' '
@@ -49,16 +45,16 @@ reset_to_sane
 test_expect_success 'symbolic-ref can be deleted' '
 	git symbolic-ref NOTHEAD refs/heads/foo &&
 	git symbolic-ref -d NOTHEAD &&
-	test_path_is_file .git/refs/heads/foo &&
-	test_path_is_missing .git/NOTHEAD
+	git rev-parse refs/heads/foo &&
+	test_must_fail git symbolic-ref NOTHEAD
 '
 reset_to_sane
 
 test_expect_success 'symbolic-ref can delete dangling symref' '
 	git symbolic-ref NOTHEAD refs/heads/missing &&
 	git symbolic-ref -d NOTHEAD &&
-	test_path_is_missing .git/refs/heads/missing &&
-	test_path_is_missing .git/NOTHEAD
+	test_must_fail git rev-parse refs/heads/missing &&
+	test_must_fail git symbolic-ref NOTHEAD
 '
 reset_to_sane