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StreamTriggerTest.java
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StreamTriggerTest.java
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/*
* Copyright (c) 2017 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.internal.utils.akka.streaming;
import static org.assertj.core.api.Assertions.assertThat;
import static org.mutabilitydetector.unittesting.MutabilityAssert.assertInstancesOf;
import static org.mutabilitydetector.unittesting.MutabilityMatchers.areImmutable;
import java.time.Duration;
import java.time.Instant;
import org.junit.Ignore;
import org.junit.Test;
import nl.jqno.equalsverifier.EqualsVerifier;
/**
* Tests {@link StreamTrigger}.
*/
public class StreamTriggerTest {
private static final Duration VERY_LONG_DURATION = Duration.ofHours(10);
private static final Instant NOW = Instant.now();
private static final Duration MIN_START_OFFSET = Duration.ofMinutes(15);
private static final Duration STREAM_INTERVAL = Duration.ofMinutes(5);
@Test
@Ignore("https://github.com/MutabilityDetector/MutabilityDetector/issues/185")
public void assertImmutability() {
assertInstancesOf(StreamTrigger.class, areImmutable());
}
@Test
public void testHashCodeAndEquals() {
EqualsVerifier.forClass(StreamTrigger.class).verify();
}
@Test
public void reschedule() {
final StreamTrigger initial = StreamTrigger.of(NOW.minusSeconds(2000), NOW.minusSeconds(1000), NOW);
final Instant rescheduledPlannedStreamStart = NOW.plusSeconds(60);
final StreamTrigger rescheduled = initial.rescheduleAt(rescheduledPlannedStreamStart);
final StreamTrigger expectedRescheduled =
StreamTrigger.of(initial.getQueryStart(), initial.getQueryEnd(), rescheduledPlannedStreamStart);
assertThat(rescheduled).isEqualTo(expectedRescheduled);
}
@Test
public void calculateTriggerWithLastEndLongTimeInThePast() {
final Instant inThePast = NOW.minus(VERY_LONG_DURATION);
final StreamTrigger actual = calculateTrigger(NOW, inThePast, MIN_START_OFFSET, STREAM_INTERVAL);
final StreamTrigger expected = createExpectedStreamTrigger(inThePast, NOW);
assertThat(actual).isEqualTo(expected);
}
/**
* Tests with last end in the past, with the restriction that it is less than "start-offset" in the past.
*/
@Test
public void calculateTriggerWithLastEndInThePastInsideStartOffset() {
final Duration beforeNow = MIN_START_OFFSET.minusSeconds(2);
//assumption:
assertThat(beforeNow).isGreaterThan(Duration.ZERO);
final Instant inThePast = NOW.minus(beforeNow);
final StreamTrigger actual = calculateTrigger(NOW, inThePast, MIN_START_OFFSET, STREAM_INTERVAL);
final StreamTrigger expected = createExpectedStreamTrigger(inThePast,
inThePast.plus(STREAM_INTERVAL).plus(MIN_START_OFFSET));
assertThat(actual).isEqualTo(expected);
}
@Test
public void calculateTriggerWithLastEndEqualToNow() {
final StreamTrigger actual = calculateTrigger(NOW, NOW, MIN_START_OFFSET, STREAM_INTERVAL);
final StreamTrigger expected = createExpectedStreamTrigger(NOW,
NOW.plus(STREAM_INTERVAL).plus(MIN_START_OFFSET));
assertThat(actual).isEqualTo(expected);
}
/**
* Unlikely, but not impossible in case of a really huge clock drift.
*/
@Test
public void calculateTriggerWithLastEndLongTimeInTheFuture() {
final Instant inTheFuture = NOW.plus(VERY_LONG_DURATION);
final StreamTrigger actual = calculateTrigger(NOW, inTheFuture, MIN_START_OFFSET, STREAM_INTERVAL);
final StreamTrigger expected = createExpectedStreamTrigger(inTheFuture,
inTheFuture.plus(STREAM_INTERVAL).plus(MIN_START_OFFSET));
assertThat(actual).isEqualTo(expected);
}
/**
* Tests with last end in the future, with the restriction that it is less than "start-offset" in the future.
*/
@Test
public void calculateTriggerWithLastEndInTheFutureInsideStartOffset() {
final Duration afterNow = MIN_START_OFFSET.minusSeconds(2);
//assumption:
assertThat(afterNow).isGreaterThan(Duration.ZERO);
final Instant inTheFuture = NOW.plus(afterNow);
final StreamTrigger actual = calculateTrigger(NOW, inTheFuture, MIN_START_OFFSET, STREAM_INTERVAL);
final StreamTrigger expected = createExpectedStreamTrigger(inTheFuture,
inTheFuture.plus(STREAM_INTERVAL).plus(MIN_START_OFFSET));
assertThat(actual).isEqualTo(expected);
}
private static StreamTrigger calculateTrigger(final Instant now, final Instant queryStart,
final Duration startOffset, final Duration streamInterval) {
return StreamTrigger.calculateStreamTrigger(now, queryStart, startOffset, streamInterval);
}
private static StreamTrigger createExpectedStreamTrigger(final Instant queryStart,
final Instant plannedStreamStart) {
return StreamTrigger.of(queryStart, queryStart.plus(STREAM_INTERVAL), plannedStreamStart);
}
}