Add generic 'strbuf_readlink()' helper function

diff --git a/t/t4019-diff-wserror.sh b/t/t4019-diff-wserror.sh
index 0d9cbb62615c0d94da784f63907989988b0e8151..84a1fe31151c2af38554eaca8f03e2c1e2e7848f 100755 (executable)
--- a/t/t4019-diff-wserror.sh
+++ b/t/t4019-diff-wserror.sh
@@ -13,7 +13,8 @@ test_expect_success setup '
        echo "  HT and SP indent" >>F &&
        echo "With trailing SP " >>F &&
        echo "Carriage ReturnQ" | tr Q "\015" >>F &&
-       echo "No problem" >>F
+       echo "No problem" >>F &&
+       echo >>F
 
 '
 
@@ -160,4 +161,33 @@ test_expect_success 'with cr-at-eol (attribute)' '
 
 '
 
+test_expect_success 'trailing empty lines (1)' '
+
+       rm -f .gitattributes &&
+       test_must_fail git diff --check >output &&
+       grep "ends with blank lines." output &&
+       grep "trailing whitespace" output
+
+'
+
+test_expect_success 'trailing empty lines (2)' '
+
+       echo "F -whitespace" >.gitattributes &&
+       git diff --check >output &&
+       ! test -s output
+
+'
+
+test_expect_success 'do not color trailing cr in context' '
+       git config --unset core.whitespace
+       rm -f .gitattributes &&
+       echo AAAQ | tr Q "\015" >G &&
+       git add G &&
+       echo BBBQ | tr Q "\015" >>G
+       git diff --color G | tr "\015" Q >output &&
+       grep "BBB.*${blue_grep}Q" output &&
+       grep "AAA.*\[mQ" output
+
+'
+
 test_done