[PATCH/RFCv2 1/2] format-patch: demonstrate that color.ui=always produces colorized patches

[Pang Yan Han <pangyanhan@gmail.com>]

commit c9bfb953 (want_color: automatically fallback to color.ui,
2011-08-17) introduced a regression where format-patch produces colorized
patches when color.ui is set to "always".

Demonstrate this through a new test.

Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Pang Yan Han <pangyanhan@gmail.com>
---
 t/t4051-format-patch-config.sh |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)
 create mode 100755 t/t4051-format-patch-config.sh

diff --git a/t/t4051-format-patch-config.sh b/t/t4051-format-patch-config.sh
new file mode 100755
index 0000000..cea9c7d
--- /dev/null
+++ b/t/t4051-format-patch-config.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+test_description='check that format-patch does not respect porcelain config'
+
+. ./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.gb47b6