xdiff: clamp function context indices in post-image

[thirdparty/git.git] / t / t4015-diff-whitespace.sh

diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh
index a9fb226c5ad566095163c5141a4ca591f2aeacb1..04d1bbecbe8adcc67e26f4c9ad6741604b22965c 100755 (executable)
--- a/t/t4015-diff-whitespace.sh
+++ b/t/t4015-diff-whitespace.sh
@@ -1897,4 +1897,26 @@ test_expect_success 'compare whitespace delta incompatible with other space opti
        test_i18ngrep allow-indentation-change err
 '
 
+# Note that the "6" in the expected hunk header below is funny, since we only
+# show 5 lines (the missing one was blank and thus ignored). This is how
+# --ignore-blank-lines behaves even without --function-context, and this test
+# is just checking the interaction of the two features. Don't take it as an
+# endorsement of that output.
+test_expect_success 'combine --ignore-blank-lines with --function-context' '
+       test_write_lines 1 "" 2 3 4 5 >a &&
+       test_write_lines 1    2 3 4   >b &&
+       test_must_fail git diff --no-index \
+               --ignore-blank-lines --function-context a b >actual.raw &&
+       sed -n "/@@/,\$p" <actual.raw >actual &&
+       cat <<-\EOF >expect &&
+       @@ -1,6 +1,4 @@
+        1
+        2
+        3
+        4
+       -5
+       EOF
+       test_cmp expect actual
+'
+
 test_done