/*
 * 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.security.Permission;

import org.apache.logging.log4j.junit.SecurityManagerTestRule;
import org.junit.Rule;
import org.junit.Test;

/**
 * Tests https://issues.apache.org/jira/browse/LOG4J2-2274.
 * <p>
 * Using a security manager can mess up other tests so this is best used from
 * integration tests (classes that end in "IT" instead of "Test" and
 * "TestCase".)
 * </p>
 * 
 * @see EnvironmentPropertySource
 * @see SecurityManager
 * @see System#setSecurityManager(SecurityManager)
 */
public class EnvironmentPropertySourceSecurityManagerIT {

	@Rule
	public final SecurityManagerTestRule rule = new SecurityManagerTestRule(new TestSecurityManager());

	/**
	 * Always throws a SecurityException for any environment variables permission
	 * check.
	 */
	private class TestSecurityManager extends SecurityManager {
		@Override
		public void checkPermission(final Permission permission) {
			if ("getenv.*".equals(permission.getName())) {
				throw new SecurityException();
			}
		}
	}

	/**
	 * Makes sure we do not blow up with exception below due to a security manager
	 * rejecting environment variable access in {@link EnvironmentPropertySource}.
	 * 
	 * <pre>
	 * java.lang.NoClassDefFoundError: Could not initialize class org.apache.logging.log4j.util.PropertiesUtil
	 *     at org.apache.logging.log4j.status.StatusLogger.<clinit>(StatusLogger.java:78)
	 *     at org.apache.logging.log4j.core.AbstractLifeCycle.<clinit>(AbstractLifeCycle.java:38)
	 *     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	 *     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	 *     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	 *     at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	 *     at org.apache.logging.log4j.core.config.builder.impl.DefaultConfigurationBuilder.build(DefaultConfigurationBuilder.java:172)
	 *     at org.apache.logging.log4j.core.config.builder.impl.DefaultConfigurationBuilder.build(DefaultConfigurationBuilder.java:161)
	 *     at org.apache.logging.log4j.core.config.builder.impl.DefaultConfigurationBuilder.build(DefaultConfigurationBuilder.java:1)
	 *     at org.apache.logging.log4j.util.EnvironmentPropertySourceSecurityManagerTest.test(EnvironmentPropertySourceSecurityManagerTest.java:55)
	 * </pre>
	 */
	@Test
	public void test() {
		PropertiesUtil.getProperties();
	}
}
