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BehaviorSubjectExample.java
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/*******************************************************************************
* Copyright (c) 2015 Christos Froussios
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*******************************************************************************/
package itrx.chapter1;
import java.util.Arrays;
import org.junit.Test;
import rx.observers.TestSubscriber;
import rx.subjects.BehaviorSubject;
public class BehaviorSubjectExample {
public void exampleLate() {
BehaviorSubject<Integer> s = BehaviorSubject.create();
s.onNext(0);
s.onNext(1);
s.onNext(2);
s.subscribe(v -> System.out.println("Late: " + v));
s.onNext(3);
// Late: 2
// Late: 3
}
public void exampleCompleted() {
BehaviorSubject<Integer> s = BehaviorSubject.create();
s.onNext(0);
s.onNext(1);
s.onNext(2);
s.onCompleted();
s.subscribe(
v -> System.out.println("Late: " + v),
e -> System.out.println("Error"),
() -> System.out.println("Completed")
);
}
public void exampleInitialvalue() {
BehaviorSubject<Integer> s = BehaviorSubject.create(0);
s.subscribe(v -> System.out.println(v));
s.onNext(1);
// 0
// 1
}
//
// Tests
//
@Test
public void testLate() {
TestSubscriber<Integer> tester = new TestSubscriber<Integer>();
BehaviorSubject<Integer> s = BehaviorSubject.create();
s.onNext(0);
s.onNext(1);
s.onNext(2);
s.subscribe(tester);
s.onNext(3);
tester.assertReceivedOnNext(Arrays.asList(2,3));
}
@Test
public void testCompleted() {
TestSubscriber<Integer> tester = new TestSubscriber<Integer>();
BehaviorSubject<Integer> s = BehaviorSubject.create();
s.onNext(0);
s.onNext(1);
s.onNext(2);
s.onCompleted();
s.subscribe(tester);
tester.assertReceivedOnNext(Arrays.asList());
tester.assertTerminalEvent();
tester.assertNoErrors();
}
@Test
public void testInitialvalue() {
TestSubscriber<Integer> tester = new TestSubscriber<Integer>();
BehaviorSubject<Integer> s = BehaviorSubject.create(0);
s.subscribe(tester);
s.onNext(1);
tester.assertReceivedOnNext(Arrays.asList(0,1));
tester.assertNoErrors();
}
}