[PATCH v3 1/3] t4202: refactor test

[Mehul Jain <mehul.jain2029@gmail.com>]

Subsequent patches will want to reuse the 'signed' branch that the
'log --graph --show-signature' test creates and uses.

Split the set-up part into a test of its own, and make the existing
test into a separate one that only inspects the history on the 'signed'
branch. This way, it becomes clearer that tests added by subsequent
patches reuse the 'signed' branch in the same way.

Signed-off-by: Mehul Jain <mehul.jain2029@gmail.com>
---
 t/t4202-log.sh | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/t/t4202-log.sh b/t/t4202-log.sh
index 128ba93..ab66ee0 100755
--- a/t/t4202-log.sh
+++ b/t/t4202-log.sh
@@ -860,12 +860,15 @@ test_expect_success 'dotdot is a parent directory' '
 	test_cmp expect actual
 '
 
-test_expect_success GPG 'log --graph --show-signature' '
+test_expect_success GPG 'setup signed branch' '
 	test_when_finished "git reset --hard && git checkout master" &&
 	git checkout -b signed master &&
 	echo foo >foo &&
 	git add foo &&
-	git commit -S -m signed_commit &&
+	git commit -S -m signed_commit
+'
+
+test_expect_success GPG 'log --graph --show-signature' '
 	git log --graph --show-signature -n1 signed >actual &&
 	grep "^| gpg: Signature made" actual &&
 	grep "^| gpg: Good signature" actual
-- 
2.9.0.rc0.dirty