diff --git a/core/src/test/java/kafka/utils/FileLockTest.java b/core/src/test/java/kafka/utils/FileLockTest.java new file mode 100644 index 0000000000000..a58c223e29444 --- /dev/null +++ b/core/src/test/java/kafka/utils/FileLockTest.java @@ -0,0 +1,97 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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 kafka.utils; + +import org.junit.jupiter.api.Test; + +import java.io.File; +import java.nio.channels.OverlappingFileLockException; + +import static org.junit.jupiter.api.Assertions.assertDoesNotThrow; +import static org.junit.jupiter.api.Assertions.assertFalse; +import static org.junit.jupiter.api.Assertions.assertThrows; +import static org.junit.jupiter.api.Assertions.assertTrue; + +class FileLockTest { + @Test + void testLock() { + File tempFile = TestUtils.tempFile(); + FileLock lock1 = new FileLock(tempFile); + try { + lock1.lock(); + assertThrows(OverlappingFileLockException.class, lock1::lock); + + FileLock lock2 = new FileLock(tempFile); + assertThrows(OverlappingFileLockException.class, lock2::lock); + assertFalse(lock2.tryLock()); + lock1.unlock(); + } finally { + lock1.destroy(); + } + } + + @Test + void testTryLock() { + File tempFile = TestUtils.tempFile(); + FileLock lock1 = new FileLock(tempFile); + try { + assertTrue(lock1.tryLock()); + assertFalse(lock1.tryLock()); + + FileLock lock2 = new FileLock(tempFile); + assertFalse(lock2.tryLock()); + assertThrows(OverlappingFileLockException.class, lock2::lock); + lock1.unlock(); + } finally { + lock1.destroy(); + } + } + + @Test + void testUnlock() { + File tempFile = TestUtils.tempFile(); + FileLock lock1 = new FileLock(tempFile); + try { + lock1.lock(); + lock1.unlock(); + lock1.lock(); + lock1.unlock(); + + assertTrue(lock1.tryLock()); + lock1.unlock(); + assertTrue(lock1.tryLock()); + lock1.unlock(); + + FileLock lock2 = new FileLock(tempFile); + assertTrue(lock2.tryLock()); + lock2.unlock(); + assertDoesNotThrow(lock2::lock); + lock2.unlock(); + } finally { + lock1.destroy(); + } + } + + @Test + void testDestroy() { + File tempFile = TestUtils.tempFile(); + FileLock lock1 = new FileLock(tempFile); + lock1.destroy(); + assertFalse(tempFile.exists()); + assertDoesNotThrow(lock1::destroy); + } +}