/** * Copyright (c) 2016-present, RxJava Contributors. * * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in * compliance with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software distributed under the License is * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See * the License for the specific language governing permissions and limitations under the License. */ package io.reactivex.flowable; import static org.junit.Assert.assertEquals; import java.util.*; import org.junit.Test; import io.reactivex.Flowable; public class FlowableStartWithTests { @Test public void startWith1() { List<String> values = Flowable.just("one", "two") .startWithArray("zero").toList().blockingGet(); assertEquals("zero", values.get(0)); assertEquals("two", values.get(2)); } @Test public void startWithIterable() { List<String> li = new ArrayList<String>(); li.add("alpha"); li.add("beta"); List<String> values = Flowable.just("one", "two").startWith(li).toList().blockingGet(); assertEquals("alpha", values.get(0)); assertEquals("beta", values.get(1)); assertEquals("one", values.get(2)); assertEquals("two", values.get(3)); } @Test public void startWithObservable() { List<String> li = new ArrayList<String>(); li.add("alpha"); li.add("beta"); List<String> values = Flowable.just("one", "two") .startWith(Flowable.fromIterable(li)) .toList() .blockingGet(); assertEquals("alpha", values.get(0)); assertEquals("beta", values.get(1)); assertEquals("one", values.get(2)); assertEquals("two", values.get(3)); } @Test public void startWithEmpty() { Flowable.just(1).startWithArray().test().assertResult(1); } }