test_cmp expect actual
'
+test_expect_success 'interdiff: setup' '
+ git checkout -b boop master &&
+ test_commit fnorp blorp &&
+ test_commit fleep blorp
+'
+
+test_expect_success 'interdiff: cover-letter' '
+ sed "y/q/ /" >expect <<-\EOF &&
+ +fleep
+ --q
+ EOF
+ git format-patch --cover-letter --interdiff=boop~2 -1 boop &&
+ test_i18ngrep "^Interdiff:$" 0000-cover-letter.patch &&
+ test_i18ngrep ! "^Interdiff:$" 0001-fleep.patch &&
+ sed "1,/^@@ /d; /^-- $/q" <0000-cover-letter.patch >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'interdiff: reroll-count' '
+ git format-patch --cover-letter --interdiff=boop~2 -v2 -1 boop &&
+ test_i18ngrep "^Interdiff ..* v1:$" v2-0000-cover-letter.patch
+'
+
+test_expect_success 'interdiff: solo-patch' '
+ cat >expect <<-\EOF &&
+ +fleep
+
+ EOF
+ git format-patch --interdiff=boop~2 -1 boop &&
+ test_i18ngrep "^Interdiff:$" 0001-fleep.patch &&
+ sed "1,/^ @@ /d; /^$/q" <0001-fleep.patch >actual &&
+ test_cmp expect actual
+'
+
test_done