test_cmp graph.exp graph.act
'
+# Most combined diffs won't meet diff-highlight's line-number filter. So we
+# create one here where one side drops a line and the other modifies it. That
+# should result in a diff like:
+#
+# - modified content
+# ++resolved content
+#
+# which naively looks like one side added "+resolved".
+test_expect_success 'diff-highlight ignores combined diffs' '
+ echo "content" >file &&
+ git add file &&
+ git commit -m base &&
+
+ >file &&
+ git commit -am master &&
+
+ git checkout -b other HEAD^ &&
+ echo "modified content" >file &&
+ git commit -am other &&
+
+ test_must_fail git merge master &&
+ echo "resolved content" >file &&
+ git commit -am resolved &&
+
+ cat >expect <<-\EOF &&
+ --- a/file
+ +++ b/file
+ @@@ -1,1 -1,0 +1,1 @@@
+ - modified content
+ ++resolved content
+ EOF
+
+ git show -c | "$DIFF_HIGHLIGHT" >actual.raw &&
+ sed -n "/^---/,\$p" <actual.raw >actual &&
+ test_cmp expect actual
+'
+
test_done