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JcToolsTest.java
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JcToolsTest.java
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/*
* Copyright The OpenTelemetry Authors
* SPDX-License-Identifier: Apache-2.0
*/
package io.opentelemetry.sdk.trace.internal;
import static org.assertj.core.api.Assertions.assertThat;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.Queue;
import java.util.concurrent.ArrayBlockingQueue;
import org.jctools.queues.MpscArrayQueue;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.condition.EnabledOnJre;
import org.junit.jupiter.api.condition.JRE;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.junit.jupiter.MockitoExtension;
import org.mockito.junit.jupiter.MockitoSettings;
import org.mockito.quality.Strictness;
@ExtendWith(MockitoExtension.class)
@MockitoSettings(strictness = Strictness.LENIENT)
class JcToolsTest {
ArrayList<String> batch = new ArrayList<>(10);
@Test
void drain_ArrayBlockingQueue() {
// Arrange
batch.add("Test3");
Queue<String> queue = new ArrayBlockingQueue<>(10);
queue.add("Test1");
queue.add("Test2");
// Act
JcTools.drain(queue, 5, batch::add);
// Assert
assertThat(batch).hasSize(3);
assertThat(queue).hasSize(0);
}
@Test
void drain_MessagePassingQueue() {
// Arrange
batch.add("Test3");
Queue<String> queue = new MpscArrayQueue<>(10);
queue.add("Test1");
queue.add("Test2");
// Act
JcTools.drain(queue, 5, batch::add);
// Assert
assertThat(batch).hasSize(3);
assertThat(queue).hasSize(0);
}
@Test
void drain_MaxBatch() {
// Arrange
Queue<String> queue = new MpscArrayQueue<>(10);
queue.add("Test1");
queue.add("Test2");
// Act
JcTools.drain(queue, 1, batch::add);
// Assert
assertThat(batch).hasSize(1);
assertThat(queue).hasSize(1);
}
@Test
void newFixedSize_MpscQueue() {
// Arrange
int capacity = 10;
// Act
Queue<Object> objects = JcTools.newFixedSizeQueue(capacity);
// Assert
assertThat(objects).isInstanceOf(MpscArrayQueue.class);
}
@Test
void capacity_MpscQueue() {
// Arrange
int capacity = 10;
Queue<Object> queue = JcTools.newFixedSizeQueue(capacity);
// Act
long queueSize = JcTools.capacity(queue);
// Assert
assertThat(queueSize).isGreaterThan(capacity);
}
@Test
void capacity_ArrayBlockingQueue() {
// Arrange
Queue<String> queue = new ArrayBlockingQueue<>(10);
// Act
long queueSize = JcTools.capacity(queue);
// Assert
assertThat(queueSize).isEqualTo(10);
}
@Test
@EnabledOnJre({JRE.JAVA_8, JRE.JAVA_11, JRE.JAVA_17})
void newFixedSizeQueue_works_with_sunMisc_prohibited() {
Assertions.assertNull(System.getSecurityManager());
SunMiscProhibitedSecurityManager testingSecurityManager =
new SunMiscProhibitedSecurityManager();
try {
System.setSecurityManager(testingSecurityManager);
Queue<Object> queue =
AccessController.doPrivileged(
(PrivilegedAction<Queue<Object>>) () -> JcTools.newFixedSizeQueue(10));
Assertions.assertNotNull(queue);
} finally {
System.setSecurityManager(null);
}
}
}