| /* |
| * Copyright (C) 2014 The Guava Authors |
| * |
| * 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 com.google.common.util.concurrent; |
| |
| import static com.google.common.util.concurrent.GeneratedMonitorTest.startThread; |
| import static com.google.common.util.concurrent.Uninterruptibles.joinUninterruptibly; |
| |
| import com.google.common.util.concurrent.GeneratedMonitorTest.FlagGuard; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.atomic.AtomicReference; |
| import junit.framework.TestCase; |
| |
| /** |
| * Supplemental tests for {@link Monitor}. |
| * |
| * <p>This test class contains various test cases that don't fit into the test case generation in |
| * {@link GeneratedMonitorTest}. |
| * |
| * @author Justin T. Sampson |
| */ |
| |
| public class SupplementalMonitorTest extends TestCase { |
| |
| public void testLeaveWithoutEnterThrowsIMSE() { |
| Monitor monitor = new Monitor(); |
| try { |
| monitor.leave(); |
| fail("expected IllegalMonitorStateException"); |
| } catch (IllegalMonitorStateException expected) { |
| } |
| } |
| |
| public void testGetWaitQueueLengthWithWrongMonitorThrowsIMSE() { |
| Monitor monitor1 = new Monitor(); |
| Monitor monitor2 = new Monitor(); |
| FlagGuard guard = new FlagGuard(monitor2); |
| try { |
| monitor1.getWaitQueueLength(guard); |
| fail("expected IllegalMonitorStateException"); |
| } catch (IllegalMonitorStateException expected) { |
| } |
| } |
| |
| public void testHasWaitersWithWrongMonitorThrowsIMSE() { |
| Monitor monitor1 = new Monitor(); |
| Monitor monitor2 = new Monitor(); |
| FlagGuard guard = new FlagGuard(monitor2); |
| try { |
| monitor1.hasWaiters(guard); |
| fail("expected IllegalMonitorStateException"); |
| } catch (IllegalMonitorStateException expected) { |
| } |
| } |
| |
| public void testNullMonitorInGuardConstructorThrowsNPE() { |
| try { |
| new FlagGuard(null); |
| fail("expected NullPointerException"); |
| } catch (NullPointerException expected) { |
| } |
| } |
| |
| public void testIsFair() { |
| assertTrue(new Monitor(true).isFair()); |
| assertFalse(new Monitor(false).isFair()); |
| } |
| |
| public void testOccupiedMethods() { |
| Monitor monitor = new Monitor(); |
| verifyOccupiedMethodsInCurrentThread(monitor, false, false, 0); |
| verifyOccupiedMethodsInAnotherThread(monitor, false, false, 0); |
| monitor.enter(); |
| try { |
| verifyOccupiedMethodsInCurrentThread(monitor, true, true, 1); |
| verifyOccupiedMethodsInAnotherThread(monitor, true, false, 0); |
| monitor.enter(); |
| try { |
| verifyOccupiedMethodsInCurrentThread(monitor, true, true, 2); |
| verifyOccupiedMethodsInAnotherThread(monitor, true, false, 0); |
| } finally { |
| monitor.leave(); |
| } |
| verifyOccupiedMethodsInCurrentThread(monitor, true, true, 1); |
| verifyOccupiedMethodsInAnotherThread(monitor, true, false, 0); |
| } finally { |
| monitor.leave(); |
| } |
| verifyOccupiedMethodsInCurrentThread(monitor, false, false, 0); |
| verifyOccupiedMethodsInAnotherThread(monitor, false, false, 0); |
| } |
| |
| private static void verifyOccupiedMethodsInCurrentThread( |
| Monitor monitor, |
| boolean expectedIsOccupied, |
| boolean expectedIsOccupiedByCurrentThread, |
| int expectedOccupiedDepth) { |
| assertEquals(expectedIsOccupied, monitor.isOccupied()); |
| assertEquals(expectedIsOccupiedByCurrentThread, monitor.isOccupiedByCurrentThread()); |
| assertEquals(expectedOccupiedDepth, monitor.getOccupiedDepth()); |
| } |
| |
| private static void verifyOccupiedMethodsInAnotherThread( |
| final Monitor monitor, |
| boolean expectedIsOccupied, |
| boolean expectedIsOccupiedByCurrentThread, |
| int expectedOccupiedDepth) { |
| final AtomicBoolean actualIsOccupied = new AtomicBoolean(); |
| final AtomicBoolean actualIsOccupiedByCurrentThread = new AtomicBoolean(); |
| final AtomicInteger actualOccupiedDepth = new AtomicInteger(); |
| final AtomicReference<Throwable> thrown = new AtomicReference<>(); |
| joinUninterruptibly( |
| startThread( |
| new Runnable() { |
| @Override |
| public void run() { |
| try { |
| actualIsOccupied.set(monitor.isOccupied()); |
| actualIsOccupiedByCurrentThread.set(monitor.isOccupiedByCurrentThread()); |
| actualOccupiedDepth.set(monitor.getOccupiedDepth()); |
| } catch (Throwable t) { |
| thrown.set(t); |
| } |
| } |
| })); |
| assertNull(thrown.get()); |
| assertEquals(expectedIsOccupied, actualIsOccupied.get()); |
| assertEquals(expectedIsOccupiedByCurrentThread, actualIsOccupiedByCurrentThread.get()); |
| assertEquals(expectedOccupiedDepth, actualOccupiedDepth.get()); |
| } |
| } |