test-lib: add the '--stress' option to run a test repeatedly under load

diff --git a/t/t2107-update-index-basic.sh b/t/t2107-update-index-basic.sh
index 32ac6e09bdc81acfb8de5cf887302794d20c8ece..2242cd098ec4ee0b278c008220d8c2a678b174c7 100755 (executable)
--- a/t/t2107-update-index-basic.sh
+++ b/t/t2107-update-index-basic.sh
@@ -37,7 +37,7 @@ test_expect_success '--cacheinfo does not accept blob null sha1' '
        echo content >file &&
        git add file &&
        git rev-parse :file >expect &&
-       test_must_fail git update-index --cacheinfo 100644 $_z40 file &&
+       test_must_fail git update-index --cacheinfo 100644 $ZERO_OID file &&
        git rev-parse :file >actual &&
        test_cmp expect actual
 '
@@ -47,7 +47,7 @@ test_expect_success '--cacheinfo does not accept gitlink null sha1' '
        (cd submodule && test_commit foo) &&
        git add submodule &&
        git rev-parse :submodule >expect &&
-       test_must_fail git update-index --cacheinfo 160000 $_z40 submodule &&
+       test_must_fail git update-index --cacheinfo 160000 $ZERO_OID submodule &&
        git rev-parse :submodule >actual &&
        test_cmp expect actual
 '
@@ -85,9 +85,9 @@ test_expect_success '--chmod=+x and chmod=-x in the same argument list' '
        >B &&
        git add A B &&
        git update-index --chmod=+x A --chmod=-x B &&
-       cat >expect <<-\EOF &&
-       100755 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 0       A
-       100644 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 0       B
+       cat >expect <<-EOF &&
+       100755 $EMPTY_BLOB 0    A
+       100644 $EMPTY_BLOB 0    B
        EOF
        git ls-files --stage A B >actual &&
        test_cmp expect actual