git-p4: tests: use test-chmtime in place of touch

Using "touch" for P4EDITOR means that the tests can be a bit
racy, since git-p4 checks the timestamp has been updated and
fails if the timestamp is not updated.

Use test-chmtime instead, which is designed for this.

Signed-off-by: Luke Diamand <luke@diamand.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t9803-git-p4-shell-metachars.sh

@@ -28,7 +28,7 @@ test_expect_success 'shell metachars in filenames' '
 		echo f2 >"file with spaces" &&
 		git add "file with spaces" &&
 		git commit -m "add files" &&
-		P4EDITOR=touch git p4 submit
+		P4EDITOR="test-chmtime +5" git p4 submit
 	) &&
 	(
 		cd "$cli" &&
@@ -47,7 +47,7 @@ test_expect_success 'deleting with shell metachars' '
 		git rm foo\$bar &&
 		git rm file\ with\ spaces &&
 		git commit -m "remove files" &&
-		P4EDITOR=touch git p4 submit
+		P4EDITOR="test-chmtime +5" git p4 submit
 	) &&
 	(
 		cd "$cli" &&

t/t9813-git-p4-preserve-users.sh

@@ -53,7 +53,9 @@ test_expect_success 'preserve users' '
 		git commit --author "Alice <alice@example.com>" -m "a change by alice" file1 &&
 		git commit --author "Bob <bob@example.com>" -m "a change by bob" file2 &&
 		git config git-p4.skipSubmitEditCheck true &&
-		P4EDITOR=touch P4USER=alice P4PASSWD=secret git p4 commit --preserve-user &&
+		P4EDITOR="test-chmtime +5" P4USER=alice P4PASSWD=secret &&
+		export P4EDITOR P4USER P4PASSWD &&
+		git p4 commit --preserve-user &&
 		p4_check_commit_author file1 alice &&
 		p4_check_commit_author file2 bob
 	)
@@ -69,7 +71,7 @@ test_expect_success 'refuse to preserve users without perms' '
 		git config git-p4.skipSubmitEditCheck true &&
 		echo "username-noperms: a change by alice" >>file1 &&
 		git commit --author "Alice <alice@example.com>" -m "perms: a change by alice" file1 &&
-		P4EDITOR=touch P4USER=bob P4PASSWD=secret &&
+		P4EDITOR="test-chmtime +5" P4USER=bob P4PASSWD=secret &&
 		export P4EDITOR P4USER P4PASSWD &&
 		test_must_fail git p4 commit --preserve-user &&
 		! git diff --exit-code HEAD..p4/master
@@ -87,7 +89,7 @@ test_expect_success 'preserve user where author is unknown to p4' '
 		git commit --author "Bob <bob@example.com>" -m "preserve: a change by bob" file1 &&
 		echo "username-unknown: a change by charlie" >>file1 &&
 		git commit --author "Charlie <charlie@example.com>" -m "preserve: a change by charlie" file1 &&
-		P4EDITOR=touch P4USER=alice P4PASSWD=secret &&
+		P4EDITOR="test-chmtime +5" P4USER=alice P4PASSWD=secret &&
 		export P4EDITOR P4USER P4PASSWD &&
 		test_must_fail git p4 commit --preserve-user &&
 		! git diff --exit-code HEAD..p4/master &&