/*
* Copyright (c) 2011-2016 Pivotal Software Inc, All Rights Reserved.
*
* 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 reactor.core.publisher;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.Assert;
import org.junit.Test;
import reactor.core.Fuseable;
import reactor.test.subscriber.AssertSubscriber;
public class FluxGenerateTest {
@Test(expected = NullPointerException.class)
public void stateSupplierNull() {
Flux.generate(null, (s, o) -> s, s -> {
});
}
@Test(expected = NullPointerException.class)
public void generatorNull() {
Flux.generate(() -> 1, null, s -> {
});
}
@Test(expected = NullPointerException.class)
public void stateConsumerNull() {
Flux.generate(() -> 1, (s, o) -> s, null);
}
@Test
public void generateEmpty() {
AssertSubscriber<Integer> ts = AssertSubscriber.create();
Flux.<Integer>generate(o -> {
o.complete();
}).subscribe(ts);
ts.assertNoValues()
.assertNoError()
.assertComplete();
}
@Test
public void generateJust() {
AssertSubscriber<Integer> ts = AssertSubscriber.create();
Flux.<Integer>generate(o -> {
o.next(1);
o.complete();
}).subscribe(ts);
ts.assertValues(1)
.assertNoError()
.assertComplete();
}
@Test
public void generateError() {
AssertSubscriber<Integer> ts = AssertSubscriber.create();
Flux.<Integer>generate(o -> {
o.error(new RuntimeException("forced failure"));
}).subscribe(ts);
ts.assertNoValues()
.assertNotComplete()
.assertError(RuntimeException.class)
.assertErrorMessage("forced failure");
}
@Test
public void generateJustBackpressured() {
AssertSubscriber<Integer> ts = AssertSubscriber.create(0);
Flux.<Integer>generate(o -> {
o.next(1);
o.complete();
}).subscribe(ts);
ts.assertNoValues()
.assertNoError()
.assertNotComplete();
ts.request(2);
ts.assertValues(1)
.assertNoError()
.assertComplete();
}
@Test
public void generateRange() {
AssertSubscriber<Integer> ts = AssertSubscriber.create();
Flux.<Integer, Integer>generate(() -> 1, (s, o) -> {
if (s < 11) {
o.next(s);
}
else {
o.complete();
}
return s + 1;
}).subscribe(ts);
ts.assertValues(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
.assertNoError()
.assertComplete();
}
@Test
public void generateRangeBackpressured() {
AssertSubscriber<Integer> ts = AssertSubscriber.create(0);
Flux.<Integer, Integer>generate(() -> 1, (s, o) -> {
if (s < 11) {
o.next(s);
}
else {
o.complete();
}
return s + 1;
}).subscribe(ts);
ts.assertNoValues()
.assertNoError()
.assertNotComplete();
ts.request(2);
ts.assertValues(1, 2)
.assertNoError()
.assertNotComplete();
ts.request(10);
ts.assertValues(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
.assertNoError()
.assertComplete();
}
@Test
public void stateSupplierThrows() {
AssertSubscriber<Integer> ts = AssertSubscriber.create();
Flux.<Integer, Integer>generate(() -> {
throw new RuntimeException("forced failure");
}, (s, o) -> {
o.next(1);
return s;
}).subscribe(ts);
ts.assertNoValues()
.assertNotComplete()
.assertError(RuntimeException.class);
}
@Test
public void generatorThrows() {
AssertSubscriber<Integer> ts = AssertSubscriber.create();
Flux.<Integer>generate(o -> {
throw new RuntimeException("forced failure");
}).subscribe(ts);
ts.assertNoValues()
.assertNotComplete()
.assertError(RuntimeException.class)
.assertErrorMessage("forced failure");
}
@Test
public void generatorMultipleOnErrors() {
AssertSubscriber<Integer> ts = AssertSubscriber.create();
Flux.<Integer>generate(o -> {
o.error(new RuntimeException("forced failure"));
o.error(new RuntimeException("forced failure"));
}).subscribe(ts);
ts.assertNoValues()
.assertNotComplete()
.assertError(RuntimeException.class)
.assertErrorMessage("forced failure");
}
@Test
public void generatorMultipleOnCompletes() {
AssertSubscriber<Integer> ts = AssertSubscriber.create();
Flux.<Integer>generate(o -> {
o.complete();
o.complete();
}).subscribe(ts);
ts.assertNoValues()
.assertComplete()
.assertNoError();
}
@Test
public void generatorMultipleOnNexts() {
AssertSubscriber<Integer> ts = AssertSubscriber.create();
Flux.<Integer>generate(o -> {
o.next(1);
o.next(1);
}).subscribe(ts);
ts.assertValues(1)
.assertNotComplete()
.assertError(IllegalStateException.class);
}
@Test
public void stateConsumerCalled() {
AssertSubscriber<Integer> ts = AssertSubscriber.create();
AtomicInteger stateConsumer = new AtomicInteger();
Flux.<Integer, Integer>generate(() -> 1, (s, o) -> {
o.complete();
return s;
}, stateConsumer::set).subscribe(ts);
ts.assertNoValues()
.assertComplete()
.assertNoError();
Assert.assertEquals(1, stateConsumer.get());
}
@Test
public void iterableSource() {
AssertSubscriber<Integer> ts = AssertSubscriber.create();
List<Integer> list = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
Flux.<Integer, Iterator<Integer>>generate(list::iterator, (s, o) -> {
if (s.hasNext()) {
o.next(s.next());
}
else {
o.complete();
}
return s;
}).subscribe(ts);
ts.assertValueSequence(list)
.assertComplete()
.assertNoError();
}
@Test
public void iterableSourceBackpressured() {
AssertSubscriber<Integer> ts = AssertSubscriber.create(0);
List<Integer> list = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
Flux.<Integer, Iterator<Integer>>generate(list::iterator, (s, o) -> {
if (s.hasNext()) {
o.next(s.next());
}
else {
o.complete();
}
return s;
}).subscribe(ts);
ts.assertNoValues()
.assertNoError()
.assertNotComplete();
ts.request(2);
ts.assertValues(1, 2)
.assertNoError()
.assertNotComplete();
ts.request(5);
ts.assertValues(1, 2, 3, 4, 5, 6, 7)
.assertNoError()
.assertNotComplete();
ts.request(10);
ts.assertValueSequence(list)
.assertComplete()
.assertNoError();
}
@Test
public void fusion() {
AssertSubscriber<Integer> ts = AssertSubscriber.create();
ts.requestedFusionMode(Fuseable.ANY);
List<Integer> list = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
Flux.<Integer, Iterator<Integer>>generate(() -> list.iterator(), (s, o) -> {
if (s.hasNext()) {
o.next(s.next());
}
else {
o.complete();
}
return s;
}).subscribe(ts);
ts.assertFuseableSource()
.assertFusionMode(Fuseable.SYNC)
.assertValues(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
}
@Test
public void fusionBoundary() {
AssertSubscriber<Integer> ts = AssertSubscriber.create();
ts.requestedFusionMode(Fuseable.ANY | Fuseable.THREAD_BARRIER);
List<Integer> list = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
Flux.<Integer, Iterator<Integer>>generate(list::iterator, (s, o) -> {
if (s.hasNext()) {
o.next(s.next());
}
else {
o.complete();
}
return s;
}).subscribe(ts);
ts.assertFuseableSource()
.assertFusionMode(Fuseable.NONE)
.assertValues(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
}
}