[PATCH] Add new testcases for format-patch root commits

[Alexander Potashev <aspotashev@gmail.com>]

1. format-patch'ing root commit shouldn't create empty patches
2. With --root it should create a patch for the root commit
3. Similar testcases with two commits in the tree

Signed-off-by: Alexander Potashev <aspotashev@gmail.com>
---

git format-patch lacks a '--no-root' option, so I used
'git config log.showroot false' to emulate it.



 t/t4033-format-patch-root-commit.sh |   52 +++++++++++++++++++++++++++++++++++
 1 files changed, 52 insertions(+), 0 deletions(-)
 create mode 100755 t/t4033-format-patch-root-commit.sh

diff --git a/t/t4033-format-patch-root-commit.sh b/t/t4033-format-patch-root-commit.sh
new file mode 100755
index 0000000..846c11c
--- /dev/null
+++ b/t/t4033-format-patch-root-commit.sh
@@ -0,0 +1,52 @@
+#!/bin/sh
+
+test_description='Format-patch root commit skipping/allowing'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+	git config log.showroot false
+	git config format.numbered false
+	echo A > file &&
+	git add file &&
+	git commit -m First
+'
+
+test_patch_count() {
+	cnt=$(grep "^Subject: \[PATCH\]" $1 | wc -l) &&
+	test $cnt = $2
+}
+
+test_patch_is_single() {
+	cnt=$(grep "^Subject: \[PATCH\] $2" $1 | wc -l) &&
+	test $cnt = 1
+}
+
+test_expect_success 'format-patch root commit with showroot = false' '
+	git format-patch -1 &&
+	test_must_fail cat 0001-First.patch
+'
+
+test_expect_success 'format-patch root commit' '
+	git format-patch --root --stdout -5 >root-only.patch &&
+	test_patch_count root-only.patch 1 &&
+	test_patch_is_single root-only.patch First
+'
+
+test_expect_success 'format-patch 2 commits without root' '
+	echo B > file &&
+	git commit -a -m Second &&
+
+	git format-patch --stdout -2 >two-except-root.patch &&
+	test_patch_count two-except-root.patch 1 &&
+	test_patch_is_single two-except-root.patch Second
+'
+
+test_expect_success 'format-patch 2 commits including root' '
+	git format-patch --root --stdout -2 >two-with-root.patch &&
+	test_patch_count two-with-root.patch 2 &&
+	test_patch_is_single two-with-root.patch First &&
+	test_patch_is_single two-with-root.patch Second
+'
+
+test_done
-- 
1.6.1.81.g61cf1