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 * https://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
18 package org.apache.commons.text.lookup;
19
20 import static org.junit.jupiter.api.Assertions.assertEquals;
21 import static org.junit.jupiter.api.Assertions.assertFalse;
22 import static org.junit.jupiter.api.Assertions.assertNull;
23
24 import org.apache.commons.lang3.SystemUtils;
25 import org.junit.jupiter.api.Test;
26
27 /**
28 * Tests {@link StringLookupFactory#INSTANCE_ENVIRONMENT_VARIABLES}.
29 */
30 class EnvironmentVariableStringLookupTest {
31
32 @Test
33 void testNull() {
34 assertNull(StringLookupFactory.INSTANCE_ENVIRONMENT_VARIABLES.apply(null));
35 }
36
37 @Test
38 void testOne() {
39 if (SystemUtils.IS_OS_WINDOWS) {
40 final String key = "PATH";
41 assertEquals(System.getenv(key), StringLookupFactory.INSTANCE_ENVIRONMENT_VARIABLES.apply(key));
42 } else if (SystemUtils.IS_OS_LINUX) {
43 final String key = "USER";
44 assertEquals(System.getenv(key), StringLookupFactory.INSTANCE_ENVIRONMENT_VARIABLES.apply(key));
45 }
46 }
47
48 @Test
49 void testToString() {
50 // does not blow up and gives some kind of string.
51 assertFalse(StringLookupFactory.INSTANCE_ENVIRONMENT_VARIABLES.toString().isEmpty());
52 }
53
54 }