t4039: abstract away SHA-1-specific constants

Adjust the test so that it computes variables for object IDs instead of
using hard-coded hashes.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t4039-diff-assume-unchanged.sh b/t/t4039-diff-assume-unchanged.sh
index 53ac44b0f0036803b48979c3c5f343ca02b1b80a..0eb0314a8b35daecd3a442592bac4de1c480ffe0 100755 (executable)
--- a/t/t4039-diff-assume-unchanged.sh
+++ b/t/t4039-diff-assume-unchanged.sh
@@ -12,6 +12,7 @@ test_expect_success 'setup' '
        git commit -m zero &&
        echo one > one &&
        echo two > two &&
+       blob=$(git hash-object one) &&
        git add one two &&
        git commit -m onetwo &&
        git update-index --assume-unchanged one &&
@@ -20,7 +21,7 @@ test_expect_success 'setup' '
 '
 
 test_expect_success 'diff-index does not examine assume-unchanged entries' '
-       git diff-index HEAD^ -- one | grep -q 5626abf0f72e58d7a153368ba57db4c673c0e171
+       git diff-index HEAD^ -- one | grep -q $blob
 '
 
 test_expect_success 'diff-files does not examine assume-unchanged entries' '