1/*
2 * Copyright (C) 2012 The Guava Authors
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.google.common.base;
18
19import junit.framework.TestCase;
20
21/**
22 * Tests for {@link StandardSystemProperty}.
23 *
24 * @author Kurt Alfred Kluever
25 */
26public class StandardSystemPropertyTest extends TestCase {
27
28  public void testGetKeyMatchesString() {
29    for (StandardSystemProperty property : StandardSystemProperty.values()) {
30      String fieldName = property.name();
31      String expected = Ascii.toLowerCase(fieldName).replaceAll("_", ".");
32      assertEquals(expected, property.key());
33    }
34  }
35
36  public void testGetValue() {
37    for (StandardSystemProperty property : StandardSystemProperty.values()) {
38      assertEquals(System.getProperty(property.key()), property.value());
39    }
40  }
41
42  public void testToString() {
43    for (StandardSystemProperty property : StandardSystemProperty.values()) {
44      assertEquals(property.key() + "=" + property.value(), property.toString());
45    }
46  }
47
48  public void testNoNullValues() {
49    for (StandardSystemProperty property : StandardSystemProperty.values()) {
50      // Even though the contract in System.getProperties() specifies that a value will exist for
51      // all of the listed keys, for some reason the "java.compiler" key returns null in some JVMs.
52      if (property != StandardSystemProperty.JAVA_COMPILER) {
53        assertNotNull(property.value());
54      }
55    }
56  }
57}
58