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

diff --git a/t/t4021-format-patch-numbered.sh b/t/t4021-format-patch-numbered.sh
index 886494b58f6739d40c2c34724064317b0d3be770..9be65fd4440a68af70e6630c8ded872d7be41f5d 100755 (executable)
--- a/t/t4021-format-patch-numbered.sh
+++ b/t/t4021-format-patch-numbered.sh
@@ -36,6 +36,11 @@ test_no_numbered() {
        test_num_no_numbered $1 2
 }
 
+test_single_cover_letter_numbered() {
+       grep "^Subject: \[PATCH 0/1\]" $1 &&
+       grep "^Subject: \[PATCH 1/1\]" $1
+}
+
 test_single_numbered() {
        grep "^Subject: \[PATCH 1/1\]" $1
 }
@@ -121,4 +126,16 @@ test_expect_success '--start-number && --numbered' '
        grep "^Subject: \[PATCH 3/3\]" patch8
 '
 
+test_expect_success 'single patch with cover-letter defaults to numbers' '
+       git format-patch --cover-letter --stdout HEAD~1 >patch9.single &&
+       test_single_cover_letter_numbered patch9.single
+'
+
+test_expect_success 'Use --no-numbered and --cover-letter single patch' '
+       git format-patch --no-numbered --stdout --cover-letter HEAD~1 >patch10 &&
+       test_no_numbered patch10
+'
+
+
+
 test_done