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1   ////////////////////////////////////////////////////////////////////////////////
2   // checkstyle: Checks Java source code for adherence to a set of rules.
3   // Copyright (C) 2001-2018 the original author or authors.
4   //
5   // This library is free software; you can redistribute it and/or
6   // modify it under the terms of the GNU Lesser General Public
7   // License as published by the Free Software Foundation; either
8   // version 2.1 of the License, or (at your option) any later version.
9   //
10  // This library is distributed in the hope that it will be useful,
11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  // Lesser General Public License for more details.
14  //
15  // You should have received a copy of the GNU Lesser General Public
16  // License along with this library; if not, write to the Free Software
17  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18  ////////////////////////////////////////////////////////////////////////////////
19  
20  package com.puppycrawl.tools.checkstyle;
21  
22  import java.util.Properties;
23  
24  import org.junit.Assert;
25  import org.junit.Test;
26  
27  public class PropertiesExpanderTest {
28  
29      @Test
30      public void testCtorException() {
31          try {
32              final Object test = new PropertiesExpander(null);
33              Assert.fail("exception expected but got " + test);
34          }
35          catch (IllegalArgumentException ex) {
36              Assert.assertEquals("Invalid exception message", "cannot pass null", ex.getMessage());
37          }
38      }
39  
40      @Test
41      public void testDefaultProperties() {
42          final Properties properties = new Properties(System.getProperties());
43          properties.setProperty("test", "checkstyle");
44          Assert.assertEquals("Invalid user.home property",
45                  System.getProperty("user.home"), properties.getProperty("user.home"));
46          Assert.assertEquals("Invalid checkstyle property",
47                  "checkstyle", properties.getProperty("test"));
48  
49          final PropertiesExpander expander = new PropertiesExpander(properties);
50          Assert.assertEquals("Invalid user.home property",
51                  System.getProperty("user.home"), expander.resolve("user.home"));
52          Assert.assertEquals("Invalid checkstyle property",
53                  "checkstyle", expander.resolve("test"));
54      }
55  
56  }