test-dir-iterator: do not assume errno values

diff --git a/t/t4000-diff-format.sh b/t/t4000-diff-format.sh
index 6ddd46915d2757bb5a40057e6850a4f72cd4dafb..8de36b7d12227a38769f658983363a5ebd52fd68 100755 (executable)
--- a/t/t4000-diff-format.sh
+++ b/t/t4000-diff-format.sh
@@ -15,17 +15,17 @@ line 3'
 cat path0 >path1
 chmod +x path1
 
-test_expect_success \
-    'update-index --add two files with and without +x.' \
-    'git update-index --add path0 path1'
+test_expect_success 'update-index --add two files with and without +x.' '
+       git update-index --add path0 path1
+'
 
 mv path0 path0-
 sed -e 's/line/Line/' <path0- >path0
 chmod +x path0
 rm -f path1
-test_expect_success \
-    'git diff-files -p after editing work tree.' \
-    'git diff-files -p >current'
+test_expect_success 'git diff-files -p after editing work tree.' '
+       git diff-files -p >actual
+'
 
 # that's as far as it comes
 if [ "$(git config --get core.filemode)" = false ]
@@ -55,8 +55,38 @@ deleted file mode 100755
 -line 3
 EOF
 
-test_expect_success \
-    'validate git diff-files -p output.' \
-    'compare_diff_patch current expected'
+test_expect_success 'validate git diff-files -p output.' '
+       compare_diff_patch expected actual
+'
+
+test_expect_success 'git diff-files -s after editing work tree' '
+       git diff-files -s >actual 2>err &&
+       test_must_be_empty actual &&
+       test_must_be_empty err
+'
+
+test_expect_success 'git diff-files --no-patch as synonym for -s' '
+       git diff-files --no-patch >actual 2>err &&
+       test_must_be_empty actual &&
+       test_must_be_empty err
+'
+
+test_expect_success 'git diff-files --no-patch --patch shows the patch' '
+       git diff-files --no-patch --patch >actual &&
+       compare_diff_patch expected actual
+'
+
+test_expect_success 'git diff-files --no-patch --patch-with-raw shows the patch and raw data' '
+       git diff-files --no-patch --patch-with-raw >actual &&
+       grep -q "^:100644 100755 .* 0000000000000000000000000000000000000000 M  path0\$" actual &&
+       tail -n +4 actual >actual-patch &&
+       compare_diff_patch expected actual-patch
+'
+
+test_expect_success 'git diff-files --patch --no-patch does not show the patch' '
+       git diff-files --patch --no-patch >actual 2>err &&
+       test_must_be_empty actual &&
+       test_must_be_empty err
+'
 
 test_done