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FroussiosFroussios
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Examples chapter 2.1
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‎tests/java/itrx/chapter2/creating/FromTest.java‎

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package itrx.chapter2.creating;
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import static org.junit.Assert.*;
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import java.util.Arrays;
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import java.util.concurrent.FutureTask;
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import org.junit.Test;
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import rx.Observable;
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import rx.Subscription;
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import rx.observers.TestSubscriber;
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import rx.schedulers.TestScheduler;
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public class FromTest {
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@Test
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public void testFromArray() {
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TestSubscriber<Integer> tester = new TestSubscriber<Integer>();
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Integer[] input = {1,2,3};
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Observable<Integer> values = Observable.from(input);
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Subscription subscription = values.subscribe(tester);
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tester.assertReceivedOnNext(Arrays.asList(input));
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tester.assertNoErrors();
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tester.assertTerminalEvent();
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}
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@Test
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public void testFromIterable() {
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TestSubscriber<Integer> tester = new TestSubscriber<Integer>();
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Iterable<Integer> input = Arrays.asList(1,2,3);
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Observable<Integer> values = Observable.from(input);
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Subscription subscription = values.subscribe(tester);
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tester.assertReceivedOnNext(Arrays.asList(1,2,3));
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tester.assertNoErrors();
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tester.assertTerminalEvent();
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}
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}

‎tests/java/itrx/chapter2/creating/FunctionalUnfoldsTest.java‎

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package itrx.chapter2.creating;
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import static org.junit.Assert.*;
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import java.util.Arrays;
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import java.util.concurrent.TimeUnit;
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import org.junit.Test;
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import rx.Observable;
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import rx.Subscription;
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import rx.observers.TestSubscriber;
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import rx.schedulers.Schedulers;
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import rx.schedulers.TestScheduler;
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public class FunctionalUnfoldsTest {
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@Test
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public void testRange() {
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TestSubscriber<Integer> tester = new TestSubscriber<Integer>();
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Observable<Integer> values = Observable.range(10, 15);
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values.subscribe(tester);
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tester.assertReceivedOnNext(Arrays.asList(10,11,12,13,14,15,16,17,18,19,20,21,22,23,24));
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tester.assertTerminalEvent();
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tester.assertNoErrors();
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}
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public void testInterval() {
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TestSubscriber<Long> tester = new TestSubscriber<Long>();
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TestScheduler scheduler = Schedulers.test();
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Observable<Long> values = Observable.interval(1000, TimeUnit.MILLISECONDS, scheduler);
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Subscription subscription = values.subscribe(tester);
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scheduler.advanceTimeBy(4500, TimeUnit.MILLISECONDS);
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tester.assertReceivedOnNext(Arrays.asList(0L, 1L, 2L, 3L));
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tester.assertNoErrors();
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assertEquals(tester.getOnCompletedEvents().size(), 0);
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}
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public void testTimer() {
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TestSubscriber<Long> tester = new TestSubscriber<Long>();
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TestScheduler scheduler = Schedulers.test();
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Observable<Long> values = Observable.timer(1, TimeUnit.SECONDS, scheduler);
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Subscription subscription = values.subscribe(tester);
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scheduler.advanceTimeBy(1, TimeUnit.SECONDS);
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tester.assertReceivedOnNext(Arrays.asList(0L));
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tester.assertNoErrors();
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tester.assertTerminalEvent();
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}
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public void testTimerWithRepeat() {
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TestSubscriber<Long> tester = new TestSubscriber<Long>();
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TestScheduler scheduler = Schedulers.test();
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Observable<Long> values = Observable.timer(2, 1, TimeUnit.SECONDS);
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Subscription subscription = values.subscribe(tester);
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tester.assertReceivedOnNext(Arrays.asList(0L,1L,2L));
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tester.assertNoErrors();
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assertEquals(tester.getOnCompletedEvents().size(), 0); // Hasn't terminated
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}
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}

‎tests/java/itrx/chapter2/creating/ObservableFactoriesTest.java‎

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package itrx.chapter2.creating;
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import static org.junit.Assert.*;
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import java.util.Arrays;
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import org.junit.Test;
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import rx.Observable;
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import rx.Subscription;
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import rx.observers.TestSubscriber;
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public class ObservableFactoriesTest {
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@Test
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public void testJust() {
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TestSubscriber<String> tester = new TestSubscriber<String>();
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Observable<String> values = Observable.just("one", "two", "three");
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Subscription subscription = values.subscribe(tester);
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tester.assertReceivedOnNext(Arrays.asList("one", "two", "three"));
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tester.assertNoErrors();
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tester.assertTerminalEvent();
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}
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@Test
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public void testEmpty() {
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TestSubscriber<String> tester = new TestSubscriber<String>();
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Observable<String> values = Observable.empty();
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Subscription subscription = values.subscribe(tester);
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tester.assertReceivedOnNext(Arrays.asList());
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tester.assertNoErrors();
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tester.assertTerminalEvent();
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}
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@Test
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public void testNever() {
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TestSubscriber<String> tester = new TestSubscriber<String>();
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Observable<String> values = Observable.never();
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Subscription subscription = values.subscribe(tester);
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tester.assertReceivedOnNext(Arrays.asList());
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tester.assertNoErrors();
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assertEquals(tester.getOnCompletedEvents().size(), 0);
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}
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@Test
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public void testError() {
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TestSubscriber<String> tester = new TestSubscriber<String>();
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Observable<String> values = Observable.error(new Exception("Oops"));
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Subscription subscription = values.subscribe(tester);
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tester.assertReceivedOnNext(Arrays.asList());
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tester.assertTerminalEvent();
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assertEquals(tester.getOnErrorEvents().size(), 1);
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assertEquals(tester.getOnCompletedEvents().size(), 0);
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}
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@Test
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public void testCreate() {
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TestSubscriber<String> tester = new TestSubscriber<String>();
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Observable<String> values = Observable.create(o -> {
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o.onNext("Hello");
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o.onCompleted();
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});
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Subscription subscription = values.subscribe(tester);
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tester.assertReceivedOnNext(Arrays.asList("Hello"));
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tester.assertTerminalEvent();
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tester.assertNoErrors();
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}
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}

‎tests/java/itrx/chapter2/reducing/IgnoreTest.java‎

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package itrx.chapter2.reducing;
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import static org.junit.Assert.*;
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import java.util.Arrays;
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import org.junit.Test;
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import rx.Observable;
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import rx.Subscription;
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import rx.observers.TestSubscriber;
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public class IgnoreTest {
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@Test
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public void testIgnoreElements() {
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TestSubscriber<Integer> tester = new TestSubscriber<Integer>();
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Observable<Integer> values = Observable.range(0, 10);
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Subscription subscription = values
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.ignoreElements()
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.subscribe(tester);
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tester.assertReceivedOnNext(Arrays.asList());
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tester.assertTerminalEvent();
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tester.assertNoErrors();
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}
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}

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