[PATCH v3 1/2] t7800-difftool: use "test_must_fail grep" instead of "! grep"

[David Aguilar]

Signed-off-by: David Aguilar <dav...@gmail.com>
---
This patch is new since v2.

This series now depends on "difftool--helper: exit when reading a prompt answer 
fails".

 t/t7800-difftool.sh | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh
index 9cf5dc9..b5b7f62 100755
--- a/t/t7800-difftool.sh
+++ b/t/t7800-difftool.sh
@@ -288,8 +288,8 @@ test_expect_success PERL 'say no to the first file' '
        git difftool -x cat branch <input >output &&
        grep m2 output &&
        grep br2 output &&
-       ! grep master output &&
-       ! grep branch output
+       test_must_fail grep master output &&
+       test_must_fail grep branch output
 '
 
 test_expect_success PERL 'say no to the second file' '
@@ -297,16 +297,16 @@ test_expect_success PERL 'say no to the second file' '
        git difftool -x cat branch <input >output &&
        grep master output &&
        grep branch output &&
-       ! grep m2 output &&
-       ! grep br2 output
+       test_must_fail grep m2 output &&
+       test_must_fail grep br2 output
 '
 
 test_expect_success PERL 'ending prompt input with EOF' '
        git difftool -x cat branch </dev/null >output &&
-       ! grep master output &&
-       ! grep branch output &&
-       ! grep m2 output &&
-       ! grep br2 output
+       test_must_fail grep master output &&
+       test_must_fail grep branch output &&
+       test_must_fail grep m2 output &&
+       test_must_fail grep br2 output
 '
 
 test_expect_success PERL 'difftool --tool-help' '
-- 
2.1.2.557.g1025af0

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