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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.chapter2.reducing;
import java.util.Arrays;
import java.util.concurrent.TimeUnit;
import org.junit.Test;
import rx.Observable;
import rx.Subscription;
import rx.observers.TestSubscriber;
import rx.schedulers.Schedulers;
import rx.schedulers.TestScheduler;
public class TakeSkipExample {
public void exampleTake() {
Observable<Integer> values = Observable.range(0, 5);
values
.take(2)
.subscribe(
v -> System.out.println(v),
e -> System.out.println("Error: " + e),
() -> System.out.println("Completed")
);
// 0
// 1
// Completed
}
public void exampleSkip() {
Observable<Integer> values = Observable.range(0, 5);
values
.skip(2)
.subscribe(
v -> System.out.println(v),
e -> System.out.println("Error: " + e),
() -> System.out.println("Completed")
);
// 2
// 3
// 4
// Completed
}
public void exampleTakeTime() {
Observable<Long> values = Observable.interval(100, TimeUnit.MILLISECONDS);
Subscription subscription = values
.take(250, TimeUnit.MILLISECONDS)
.subscribe(
v -> System.out.println(v),
e -> System.out.println("Error: " + e),
() -> System.out.println("Completed")
);
subscription.unsubscribe();
// 0
// 1
// Completed
}
public void exampleSkipTime() {
Observable<Long> values = Observable.interval(100, TimeUnit.MILLISECONDS);
Subscription subscription = values
.skip(250, TimeUnit.MILLISECONDS)
.subscribe(
v -> System.out.println(v),
e -> System.out.println("Error: " + e),
() -> System.out.println("Completed")
);
subscription.unsubscribe();
// 2
// 3
// 4
// Completed
}
public void exampleTakeWhile() {
Observable<Long> values = Observable.interval(100, TimeUnit.MILLISECONDS);
Subscription subscription = values
.takeWhile(v -> v < 2)
.subscribe(
v -> System.out.println(v),
e -> System.out.println("Error: " + e),
() -> System.out.println("Completed")
);
subscription.unsubscribe();
// 0
// 1
// Completed
}
public void exampleSkipWhile() {
Observable<Long> values = Observable.interval(100, TimeUnit.MILLISECONDS);
Subscription subscription = values
.skipWhile(v -> v < 2)
.subscribe(
v -> System.out.println(v),
e -> System.out.println("Error: " + e),
() -> System.out.println("Completed")
);
subscription.unsubscribe();
// 2
// 3
// 4
// ...
}
public void exampleSkipLast() {
Observable<Integer> values = Observable.range(0,5);
values
.skipLast(2)
.subscribe(
v -> System.out.println(v),
e -> System.out.println("Error: " + e),
() -> System.out.println("Completed")
);
// 0
// 1
// 2
// Completed
}
public void exampleTakeLast() {
Observable<Integer> values = Observable.range(0,5);
values
.takeLast(2)
.subscribe(
v -> System.out.println(v),
e -> System.out.println("Error: " + e),
() -> System.out.println("Completed")
);
// 3
// 4
// ...
}
public void exampleTakeUntil() {
Observable<Long> values = Observable.interval(100,TimeUnit.MILLISECONDS);
Observable<Long> cutoff = Observable.timer(250, TimeUnit.MILLISECONDS);
Subscription subscription = values
.takeUntil(cutoff)
.subscribe(
v -> System.out.println(v),
e -> System.out.println("Error: " + e),
() -> System.out.println("Completed")
);
subscription.unsubscribe();
// 0
// 1
// Completed
}
public void exampleSkipUntil() {
Observable<Long> values = Observable.interval(100,TimeUnit.MILLISECONDS);
Observable<Long> cutoff = Observable.timer(250, TimeUnit.MILLISECONDS);
Subscription subscription = values
.skipUntil(cutoff)
.subscribe(
v -> System.out.println(v),
e -> System.out.println("Error: " + e),
() -> System.out.println("Completed")
);
subscription.unsubscribe();
// 2
// 3
// 4
// ...
}
//
// Tests
//
@Test
public void testTake() {
TestSubscriber<Integer> tester = new TestSubscriber<Integer>();
Observable<Integer> values = Observable.range(0, 5);
values
.take(2)
.subscribe(tester);
tester.assertReceivedOnNext(Arrays.asList(0,1));
tester.assertTerminalEvent();
tester.assertNoErrors();
}
@Test
public void testSkip() {
TestSubscriber<Integer> tester = new TestSubscriber<Integer>();
Observable<Integer> values = Observable.range(0, 5);
values
.skip(2)
.subscribe(tester);
tester.assertReceivedOnNext(Arrays.asList(2,3,4));
tester.assertTerminalEvent();
tester.assertNoErrors();
}
@Test
public void testTakeTime() {
TestScheduler scheduler = Schedulers.test();
TestSubscriber<Long> tester = new TestSubscriber<Long>();
Observable<Long> values = Observable.interval(100, TimeUnit.MILLISECONDS ,scheduler);
Subscription subscription = values
.take(250, TimeUnit.MILLISECONDS, scheduler)
.subscribe(tester);
scheduler.advanceTimeBy(1000, TimeUnit.MILLISECONDS);
subscription.unsubscribe();
tester.assertReceivedOnNext(Arrays.asList(0L,1L));
tester.assertTerminalEvent();
tester.assertNoErrors();
}
@Test
public void testSkipTime() {
TestScheduler scheduler = Schedulers.test();
TestSubscriber<Long> tester = new TestSubscriber<Long>();
Observable<Long> values = Observable.interval(100, TimeUnit.MILLISECONDS, scheduler);
Subscription subscription = values
.skip(250, TimeUnit.MILLISECONDS, scheduler)
.subscribe(tester);
scheduler.advanceTimeBy(550, TimeUnit.MILLISECONDS);
subscription.unsubscribe();
tester.assertReceivedOnNext(Arrays.asList(2L, 3L, 4L));
tester.assertNoErrors();
}
@Test
public void testTakeWhile() {
TestScheduler scheduler = Schedulers.test();
TestSubscriber<Long> tester = new TestSubscriber<Long>();
Observable<Long> values = Observable.interval(100, TimeUnit.MILLISECONDS, scheduler);
Subscription subscription = values
.takeWhile(v -> v < 2)
.subscribe(tester);
scheduler.advanceTimeBy(550, TimeUnit.MILLISECONDS);
subscription.unsubscribe();
tester.assertReceivedOnNext(Arrays.asList(0L, 1L));
tester.assertTerminalEvent();
tester.assertNoErrors();
}
@Test
public void testSkipWhile() {
TestScheduler scheduler = Schedulers.test();
TestSubscriber<Long> tester = new TestSubscriber<Long>();
Observable<Long> values = Observable.interval(100, TimeUnit.MILLISECONDS, scheduler);
Subscription subscription = values
.skipWhile(v -> v < 2)
.subscribe(tester);
scheduler.advanceTimeBy(550, TimeUnit.MILLISECONDS);
subscription.unsubscribe();
tester.assertReceivedOnNext(Arrays.asList(2L, 3L, 4L));
tester.assertNoErrors();
}
@Test
public void testerSkipLast() {
TestSubscriber<Integer> tester = new TestSubscriber<Integer>();
Observable<Integer> values = Observable.range(0,5);
values
.skipLast(2)
.subscribe(tester);
tester.assertReceivedOnNext(Arrays.asList(0,1,2));
tester.assertTerminalEvent();
tester.assertNoErrors();
}
@Test
public void testTakeLast() {
TestSubscriber<Integer> tester = new TestSubscriber<Integer>();
Observable<Integer> values = Observable.range(0,5);
values
.takeLast(2)
.subscribe(tester);
tester.assertReceivedOnNext(Arrays.asList(3,4));
tester.assertTerminalEvent();
tester.assertNoErrors();
}
@Test
public void testTakeUntil() {
TestScheduler scheduler = Schedulers.test();
TestSubscriber<Long> tester = new TestSubscriber<Long>();
Observable<Long> values = Observable.interval(100,TimeUnit.MILLISECONDS, scheduler);
Observable<Long> cutoff = Observable.timer(250, TimeUnit.MILLISECONDS, scheduler);
Subscription subscription = values
.takeUntil(cutoff)
.subscribe(tester);
scheduler.advanceTimeBy(550, TimeUnit.MILLISECONDS);
subscription.unsubscribe();
tester.assertReceivedOnNext(Arrays.asList(0L,1L));
tester.assertTerminalEvent();
tester.assertNoErrors();
}
@Test
public void testSkipUntil() {
TestScheduler scheduler = Schedulers.test();
TestSubscriber<Long> tester = new TestSubscriber<Long>();
Observable<Long> values = Observable.interval(100,TimeUnit.MILLISECONDS, scheduler);
Observable<Long> cutoff = Observable.timer(250, TimeUnit.MILLISECONDS, scheduler);
Subscription subscription = values
.skipUntil(cutoff)
.subscribe(tester);
scheduler.advanceTimeBy(550, TimeUnit.MILLISECONDS);
subscription.unsubscribe();
tester.assertReceivedOnNext(Arrays.asList(2L,3L,4L));
tester.assertNoErrors();
}
}