public Connection<String, String> connect(
ConnectionObservable<String, String> connectionObservable) {
TestSubscriber<Connection<String, String>> testSub = new TestSubscriber<>();
connectionObservable.subscribe(testSub);
testSub.awaitTerminalEvent();
testSub.assertNoErrors();
testSub.assertValueCount(1);
return testSub.getOnNextEvents().get(0);
}
