@Test
public void acceptValidConnectionWithValidNumberPayloadMapping() {

    final Connection connection = createConnection(CONNECTION_ID)
            .toBuilder()
            .setSources(TestConstants.Sources.SOURCES_WITH_VALID_MAPPING_NUMBER)
            .setTargets(TestConstants.Targets.TARGET_WITH_VALID_MAPPING_NUMBER)
            .build();
    final ConnectionValidator underTest = getConnectionValidator();
    underTest.validate(connection, DittoHeaders.empty(), actorSystem);
}