[PATCH/RFC 1/2] format-patch: demonstrate that color.ui=always produces colorized patches

commit c9bfb953 (want_color: automatically fallback to color.ui) introduced
a regression where format-patch produces colorized patches when color.ui is
set to "always". Demonstrate this through a new test.

Signed-off-by: Pang Yan Han <redacted>
---
Hi, I don't know if I actually understand the naming convention for tests
correctly here, so I used the next available number for the last 2 digits.

 t/t4051-format-patch-color.sh |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)
 create mode 100755 t/t4051-format-patch-color.sh

diff --git a/t/t4051-format-patch-color.sh b/t/t4051-format-patch-color.sh
new file mode 100755
index 0000000..db30840
--- /dev/null
+++ b/t/t4051-format-patch-color.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+test_description='format-patch - check for non colorized output'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+	echo foo >foo &&
+	git add foo &&
+	git commit -m "commit1" &&
+	echo bar >foo &&
+	git add foo &&
+	git commit -m "commit2"
+'
+
+test_expect_failure 'format patch with ui.color=always generates non colorized patch' '
+	git config color.ui always &&
+	git format-patch -1 &&
+	mv 0001-commit2.patch actual &&
+	test_must_fail grep "\[31m-" actual
+'
+
+test_done

-- 
1.7.7.rc0.190.g816e