public Optional<RouteMapper> findTableMapper(final String logicDataSourceName, final String actualTableName) {
        for (RouteMapper each : tableMappers) {
            if (logicDataSourceName.equalsIgnoreCase(dataSourceMapper.getLogicName()) && actualTableName.equalsIgnoreCase(each.getActualName())) {
                return Optional.of(each);
            }
        }
        return Optional.empty();
    }
@Test
    void assertFindTableMapper() {
        Optional<RouteMapper> actual = routeUnit.findTableMapper(LOGIC_DATA_SOURCE, ACTUAL_TABLE_0);
        assertTrue(actual.isPresent());
        assertThat(actual.get().getLogicName(), is(LOGIC_TABLE));
        assertThat(actual.get().getActualName(), is(ACTUAL_TABLE_0));
    }