@Test
public void testValidBootstrapServers() {

    final DittoHeaders emptyDittoHeaders = DittoHeaders.empty();
    underTest.validate(getConnectionWithBootstrapServers("foo:123"), emptyDittoHeaders, actorSystem);
    underTest.validate(getConnectionWithBootstrapServers("foo:123,bar:456"), emptyDittoHeaders, actorSystem);
    underTest.validate(getConnectionWithBootstrapServers("foo:123, bar:456 , baz:789"), emptyDittoHeaders,
            actorSystem);
}