t/lib-diff-alternative: abstract away SHA-1-specific constants

diff --git a/t/t4030-diff-textconv.sh b/t/t4030-diff-textconv.sh
index aad6c7f78db34703b2f9b1ed72239cd3b4005016..4cb9f0e523d2218566554cdccd9c2e3929f3d05b 100755 (executable)
--- a/t/t4030-diff-textconv.sh
+++ b/t/t4030-diff-textconv.sh
@@ -148,7 +148,8 @@ test_expect_success 'diffstat does not run textconv' '
 # restore working setup
 echo file diff=foo >.gitattributes
 
-cat >expect.typechange <<'EOF'
+symlink=$(git rev-parse --short $(printf frotz | git hash-object --stdin))
+cat >expect.typechange <<EOF
 --- a/file
 +++ /dev/null
 @@ -1,2 +0,0 @@
@@ -156,7 +157,7 @@ cat >expect.typechange <<'EOF'
 -1
 diff --git a/file b/file
 new file mode 120000
-index 0000000..67be421
+index 0000000..$symlink
 --- /dev/null
 +++ b/file
 @@ -0,0 +1 @@