test_run() {
    # Test that links-update --mode works.

    test_setup
    local expected_mode='0622'
    test_run_update --mode "$expected_mode"

    local expected_output="$test_dest_dir->
$test_dest_dir/1.txt->$test_src_dir/%DEST%/1.txt
$test_dest_dir/bar->
$test_dest_dir/bar/3.txt->$test_src_dir/%DEST%/bar/3.txt
$test_dest_dir/bar/baz->
$test_dest_dir/bar/baz/4.txt->$test_src_dir/%DEST%/bar/baz/4.txt
$test_dest_dir/foo->
$test_dest_dir/foo/2.txt->$test_src_dir/%DEST%/foo/2.txt"

    test_verify_output "$test_dest_dir" "$expected_output"
    test_verify_mode "$test_src_dir/%DEST%/1.txt" "$expected_mode"
}