git p4 test: use client_view in t9806

Use the standard client_view function from lib-git-p4.sh
instead of building one by hand.  This requires a bit of
rework, using the current value of $P4CLIENT for the client
name.  It also reorganizes the test to isolate changes to
$P4CLIENT and $cli in a subshell.

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/lib-git-p4.sh

@@ -116,8 +116,8 @@ marshal_dump() {
 client_view() {
 	(
 		cat <<-EOF &&
-		Client: client
-		Description: client
+		Client: $P4CLIENT
+		Description: $P4CLIENT
 		Root: $cli
 		View:
 		EOF

t/t9806-git-p4-options.sh

@@ -214,41 +214,34 @@ test_expect_success 'clone --use-client-spec' '
 		exec >/dev/null &&
 		test_must_fail git p4 clone --dest="$git" --use-client-spec
 	) &&
+	# build a different client
 	cli2=$(test-path-utils real_path "$TRASH_DIRECTORY/cli2") &&
 	mkdir -p "$cli2" &&
 	test_when_finished "rmdir \"$cli2\"" &&
-	(
-		cd "$cli2" &&
-		p4 client -i <<-EOF
-		Client: client2
-		Description: client2
-		Root: $cli2
-		View: //depot/sub/... //client2/bus/...
-		EOF
-	) &&
 	test_when_finished cleanup_git &&
 	(
+		# group P4CLIENT and cli changes in a sub-shell
 		P4CLIENT=client2 &&
-		git p4 clone --dest="$git" --use-client-spec //depot/...
-	) &&
+		cli="$cli2" &&
+		client_view "//depot/sub/... //client2/bus/..." &&
+		git p4 clone --dest="$git" --use-client-spec //depot/... &&
 		(
 			cd "$git" &&
 			test_path_is_file bus/dir/f4 &&
 			test_path_is_missing file1
 		) &&
 		cleanup_git &&
-
 		# same thing again, this time with variable instead of option
 		(
 			cd "$git" &&
 			git init &&
 			git config git-p4.useClientSpec true &&
-		P4CLIENT=client2 &&
 			git p4 sync //depot/... &&
 			git checkout -b master p4/master &&
 			test_path_is_file bus/dir/f4 &&
 			test_path_is_missing file1
 		)
+	)
 '
 
 test_expect_success 'submit works with no p4/master' '