t9813: avoid using pipes

The exit code of the upstream in a pipe is ignored thus we should avoid
using it. By writing out the output of the git command to a file, we can
test the exit codes of both the commands.

Signed-off-by: Pranit Bauva <pranit.bauva@gmail.com>
Acked-by: Luke Diamand <luke@diamand.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t9813-git-p4-preserve-users.sh b/t/t9813-git-p4-preserve-users.sh
index 76004a5..bda222a 100755 (executable)
--- a/t/t9813-git-p4-preserve-users.sh
+++ b/t/t9813-git-p4-preserve-users.sh
@@ -118,12 +118,12 @@ test_expect_success 'not preserving user with mixed authorship' '
                make_change_by_user usernamefile3 Derek derek@example.com &&
                P4EDITOR=cat P4USER=alice P4PASSWD=secret &&
                export P4EDITOR P4USER P4PASSWD &&
-               git p4 commit |\
-               grep "git author derek@example.com does not match" &&
+               git p4 commit >actual &&
+               grep "git author derek@example.com does not match" actual &&
 
                make_change_by_user usernamefile3 Charlie charlie@example.com &&
-               git p4 commit |\
-               grep "git author charlie@example.com does not match" &&
+               git p4 commit >actual &&
+               grep "git author charlie@example.com does not match" actual &&
 
                make_change_by_user usernamefile3 alice alice@example.com &&
                git p4 commit >actual &&