true built-in diff: run everything in-core.

diff --git a/t/t4001-diff-rename.sh b/t/t4001-diff-rename.sh
index be474856824f8e6659151590ed5acff38187e97d..08c11319a70be6dfbcc530d9462c36254a3acd8e 100755 (executable)
--- a/t/t4001-diff-rename.sh
+++ b/t/t4001-diff-rename.sh
@@ -7,6 +7,7 @@ test_description='Test rename detection in diff engine.
 
 '
 . ./test-lib.sh
+. ../diff-lib.sh
 
 echo >path0 'Line 1
 Line 2
@@ -48,7 +49,7 @@ rename from path0
 rename to path1
 --- a/path0
 +++ b/path1
-@@ -8,7 +8,7 @@ Line 7
+@@ -8,7 +8,7 @@
  Line 8
  Line 9
  Line 10
@@ -61,6 +62,6 @@ EOF
 
 test_expect_success \
     'validate the output.' \
-    'diff -I "similarity.*" >/dev/null current expected'
+    'compare_diff_patch current expected'
 
 test_done