| /* |
| * 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 org.apache.logging.log4j.util; |
| |
| import java.util.Stack; |
| |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.BlockJUnit4ClassRunner; |
| import org.junit.runners.ParentRunner; |
| |
| import static org.hamcrest.CoreMatchers.is; |
| import static org.junit.Assert.*; |
| import static org.junit.Assume.assumeThat; |
| |
| @RunWith(BlockJUnit4ClassRunner.class) |
| public class StackLocatorUtilTest { |
| |
| |
| @Test |
| public void testStackTraceEquivalence() throws Throwable { |
| for (int i = 1; i < 15; i++) { |
| final Class<?> expected = StackLocatorUtilTest.class; |
| final Class<?> actual = StackLocatorUtil.getCallerClass(i); |
| final Class<?> fallbackActual = Class.forName( |
| StackLocatorUtil.getStackTraceElement(i).getClassName()); |
| assertSame(expected, actual); |
| assertSame(expected, fallbackActual); |
| } |
| } |
| |
| @Test |
| public void testGetCallerClass() throws Exception { |
| final Class<?> expected = StackLocatorUtilTest.class; |
| final Class<?> actual = StackLocatorUtil.getCallerClass(1); |
| assertSame(expected, actual); |
| } |
| |
| @Test |
| public void testGetCallerClassNameViaStackTrace() throws Exception { |
| final Class<?> expected = StackLocatorUtilTest.class; |
| final Class<?> actual = Class.forName(new Throwable().getStackTrace()[0].getClassName()); |
| assertSame(expected, actual); |
| } |
| |
| @Test |
| public void testGetCurrentStackTrace() throws Exception { |
| final Stack<Class<?>> classes = StackLocatorUtil.getCurrentStackTrace(); |
| final Stack<Class<?>> reversed = new Stack<>(); |
| reversed.ensureCapacity(classes.size()); |
| while (!classes.empty()) { |
| reversed.push(classes.pop()); |
| } |
| while (reversed.peek() != StackLocatorUtil.class) { |
| reversed.pop(); |
| } |
| reversed.pop(); // ReflectionUtil |
| assertSame(StackLocatorUtilTest.class, reversed.pop()); |
| } |
| |
| @Test |
| public void testGetCallerClassViaName() throws Exception { |
| final Class<?> expected = BlockJUnit4ClassRunner.class; |
| final Class<?> actual = StackLocatorUtil.getCallerClass("org.junit.runners.ParentRunner"); |
| // if this test fails in the future, it's probably because of a JUnit upgrade; check the new stack trace and |
| // update this test accordingly |
| assertSame(expected, actual); |
| } |
| |
| @Test |
| public void testGetCallerClassViaAnchorClass() throws Exception { |
| final Class<?> expected = BlockJUnit4ClassRunner.class; |
| final Class<?> actual = StackLocatorUtil.getCallerClass(ParentRunner.class); |
| // if this test fails in the future, it's probably because of a JUnit upgrade; check the new stack trace and |
| // update this test accordingly |
| assertSame(expected, actual); |
| } |
| |
| @Test |
| public void testLocateClass() { |
| final ClassLocator locator = new ClassLocator(); |
| final Class<?> clazz = locator.locateClass(); |
| assertNotNull("Could not locate class", clazz); |
| assertEquals("Incorrect class", this.getClass(), clazz); |
| } |
| |
| } |