1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.commons.configuration2.interpol; 18 19 import static org.junit.jupiter.api.Assertions.assertEquals; 20 import static org.junit.jupiter.api.Assertions.assertNull; 21 22 import java.util.Map; 23 24 import org.junit.jupiter.api.BeforeEach; 25 import org.junit.jupiter.api.Test; 26 27 /** 28 * Test class for EnvironmentLookup. 29 */ 30 public class TestEnvironmentLookup { 31 /** The lookup to be tested. */ 32 private Lookup lookup; 33 34 @BeforeEach 35 public void setUp() throws Exception { 36 lookup = DefaultLookups.ENVIRONMENT.getLookup(); 37 } 38 39 /** 40 * Tests whether environment variables can be queried. 41 */ 42 @Test 43 public void testLookup() { 44 for (final Map.Entry<String, String> e : System.getenv().entrySet()) { 45 assertEquals(e.getValue(), lookup.lookup(e.getKey()), "Wrong value for " + e.getKey()); 46 } 47 } 48 49 /** 50 * Tries to lookup a non existing property. 51 */ 52 @Test 53 public void testLookupNonExisting() { 54 assertNull(lookup.lookup("a non existing variable!")); 55 } 56 }