[PATCH 09/12] t7301: use test_terminal to check color

[Jeff King]

This test wants to confirm that "clean -i" shows color
output. Using test_terminal gives us a more realistic
environment than "color.ui=always", and prepares us for the
behavior of "always" changing in a future patch.

Signed-off-by: Jeff King <p...@peff.net>
---
 t/t7301-clean-interactive.sh | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/t/t7301-clean-interactive.sh b/t/t7301-clean-interactive.sh
index 556e1850e2..1bf9789c8a 100755
--- a/t/t7301-clean-interactive.sh
+++ b/t/t7301-clean-interactive.sh
@@ -3,6 +3,7 @@
 test_description='git clean -i basic tests'
 
 . ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-terminal.sh
 
 test_expect_success 'setup' '
 
@@ -472,10 +473,10 @@ test_expect_success 'git clean -id with prefix and path 
(ask)' '
 
 '
 
-test_expect_success 'git clean -i paints the header in HEADER color' '
+test_expect_success TTY 'git clean -i paints the header in HEADER color' '
        >a.out &&
        echo q |
-       git -c color.ui=always clean -i |
+       test_terminal git clean -i |
        test_decode_color |
        head -n 1 >header &&
        # not i18ngrep
-- 
2.14.2.1079.gce6b466188