t4045: abstract away SHA-1-specific constants

Adjust the test so that it computes variables for blobs 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/t4045-diff-relative.sh b/t/t4045-diff-relative.sh
index 6471a68701dd4bc140d43ba91ebb899036ae0d4d..36f8ed8a818714abc234ca940a59693f4be21046 100755 (executable)
--- a/t/t4045-diff-relative.sh
+++ b/t/t4045-diff-relative.sh
@@ -8,6 +8,7 @@ test_expect_success 'setup' '
        echo content >file1 &&
        mkdir subdir &&
        echo other content >subdir/file2 &&
+       blob=$(git hash-object subdir/file2) &&
        git add . &&
        git commit -m one
 '
@@ -17,10 +18,11 @@ check_diff () {
        shift
        expect=$1
        shift
+       short_blob=$(git rev-parse --short $blob)
        cat >expected <<-EOF
        diff --git a/$expect b/$expect
        new file mode 100644
-       index 0000000..25c05ef
+       index 0000000..$short_blob
        --- /dev/null
        +++ b/$expect
        @@ -0,0 +1 @@
@@ -68,7 +70,7 @@ check_raw () {
        expect=$1
        shift
        cat >expected <<-EOF
-       :000000 100644 0000000000000000000000000000000000000000 25c05ef3639d2d270e7fe765a67668f098092bc5 A      $expect
+       :000000 100644 0000000000000000000000000000000000000000 $blob A $expect
        EOF
        test_expect_success "--raw $*" "
                git -C '$dir' diff --no-abbrev --raw $* HEAD^ >actual &&