@Override
    public String toString(final RouteUnit routeUnit) {
        StringBuilder result = new StringBuilder();
        appendInsertValue(routeUnit, result);
        result.delete(result.length() - 2, result.length());
        return result.toString();
    }
@Test
    void assertToStringWithRouteUnit() {
        assertThat(shardingInsertValuesToken.toString(routeUnit), is("('shardingsphere', 'test')"));
    }