grep: enable recurse-submodules to work on <tree> objects

diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh
index 4a4f374824bd433540e4d3b16ead5a87d7838759..289806d0c7eb02e0acc5244df5e3999d45b4e085 100755 (executable)
--- a/t/t4015-diff-whitespace.sh
+++ b/t/t4015-diff-whitespace.sh
@@ -937,4 +937,39 @@ test_expect_success 'test --ws-error-highlight option' '
 
 '
 
+test_expect_success 'test diff.wsErrorHighlight config' '
+
+       git -c color.diff=always -c diff.wsErrorHighlight=default,old diff |
+       test_decode_color >current &&
+       test_cmp expect.default-old current &&
+
+       git -c color.diff=always -c diff.wsErrorHighlight=all diff |
+       test_decode_color >current &&
+       test_cmp expect.all current &&
+
+       git -c color.diff=always -c diff.wsErrorHighlight=none diff |
+       test_decode_color >current &&
+       test_cmp expect.none current
+
+'
+
+test_expect_success 'option overrides diff.wsErrorHighlight' '
+
+       git -c color.diff=always -c diff.wsErrorHighlight=none \
+               diff --ws-error-highlight=default,old |
+       test_decode_color >current &&
+       test_cmp expect.default-old current &&
+
+       git -c color.diff=always -c diff.wsErrorHighlight=default \
+               diff --ws-error-highlight=all |
+       test_decode_color >current &&
+       test_cmp expect.all current &&
+
+       git -c color.diff=always -c diff.wsErrorHighlight=all \
+               diff --ws-error-highlight=none |
+       test_decode_color >current &&
+       test_cmp expect.none current
+
+'
+
 test_done