[PATCH v2 2/3] Make test t3700-add.sh more robust

[Ingo Brückl]

Don't rely on chmod to work on the underlying platform (although it
wouldn't harm the result of the '--chmod=-x' test). Directly check the
result of the --chmod option.

Add a test_mode_in_index helper function in order to check for success.

Signed-off-by: Ingo Brückl <i...@wupperonline.de>
---
 t/t3700-add.sh          | 20 ++++----------------
 t/test-lib-functions.sh | 14 ++++++++++++++
 2 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/t/t3700-add.sh b/t/t3700-add.sh
index 494f5b8..c08ec9e 100755
--- a/t/t3700-add.sh
+++ b/t/t3700-add.sh
@@ -332,25 +332,13 @@ test_expect_success 'git add --dry-run --ignore-missing 
of non-existing file out
        test_i18ncmp expect.err actual.err
 '

-test_expect_success 'git add --chmod=+x stages a non-executable file with +x' '
+test_expect_success 'git add --chmod=[+-]x stages correctly' '
        rm -f foo1 &&
        echo foo >foo1 &&
        git add --chmod=+x foo1 &&
-       case "$(git ls-files --stage foo1)" in
-       100755" "*foo1) echo pass;;
-       *) echo fail; git ls-files --stage foo1; (exit 1);;
-       esac
-'
-
-test_expect_success 'git add --chmod=-x stages an executable file with -x' '
-       rm -f xfoo1 &&
-       echo foo >xfoo1 &&
-       chmod 755 xfoo1 &&
-       git add --chmod=-x xfoo1 &&
-       case "$(git ls-files --stage xfoo1)" in
-       100644" "*xfoo1) echo pass;;
-       *) echo fail; git ls-files --stage xfoo1; (exit 1);;
-       esac
+       test_mode_in_index 100755 foo1 &&
+       git add --chmod=-x foo1 &&
+       test_mode_in_index 100644 foo1
 '

 test_expect_success POSIXPERM,SYMLINKS 'git add --chmod=+x with symlinks' '
diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 4f7eadb..0e6652b 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -990,3 +990,17 @@ test_copy_bytes () {
                }
        ' - "$1"
 }
+
+# Test the file mode "$1" of the file "$2" in the index.
+test_mode_in_index () {
+       case "$(git ls-files --stage "$2")" in
+               $1\ *"$2")
+                       echo pass
+                       ;;
+               *)
+                       echo fail
+                       git ls-files --stage "$2"
+                       return 1
+                       ;;
+       esac
+}
--
2.9.2

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