1 /*
2  * Copyright (C) 2009 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 
17 package com.google.common.escape;
18 
19 import com.google.common.annotations.GwtCompatible;
20 import com.google.common.collect.ImmutableMap;
21 
22 import junit.framework.TestCase;
23 
24 import java.util.Map;
25 
26 /**
27  * @author David Beaumont
28  */
29 @GwtCompatible
30 public class ArrayBasedEscaperMapTest extends TestCase {
testNullMap()31   public void testNullMap() {
32     try {
33       ArrayBasedEscaperMap.create(null);
34       fail("expected exception did not occur");
35     } catch (NullPointerException e) {
36       // pass
37     }
38   }
39 
testEmptyMap()40   public void testEmptyMap() {
41     Map<Character, String> map = ImmutableMap.of();
42     ArrayBasedEscaperMap fem = ArrayBasedEscaperMap.create(map);
43     // Non-null array of zero length.
44     assertEquals(0, fem.getReplacementArray().length);
45   }
46 
testMapLength()47   public void testMapLength() {
48     Map<Character, String> map = ImmutableMap.of(
49         'a', "first",
50         'z', "last");
51     ArrayBasedEscaperMap fem = ArrayBasedEscaperMap.create(map);
52     // Array length is highest character value + 1
53     assertEquals('z' + 1, fem.getReplacementArray().length);
54   }
55 
testMapping()56   public void testMapping() {
57     Map<Character, String> map = ImmutableMap.of(
58         '\0', "zero",
59         'a', "first",
60         'b', "second",
61         'z', "last",
62         '\uFFFF', "biggest");
63     ArrayBasedEscaperMap fem = ArrayBasedEscaperMap.create(map);
64     char[][] replacementArray = fem.getReplacementArray();
65     // Array length is highest character value + 1
66     assertEquals(65536, replacementArray.length);
67     // The final element should always be non null.
68     assertNotNull(replacementArray[replacementArray.length - 1]);
69     // Exhaustively check all mappings (an int index avoids wrapping).
70     for (int n = 0; n < replacementArray.length; ++n) {
71       char c = (char) n;
72       if (replacementArray[n] != null) {
73         assertEquals(map.get(c), new String(replacementArray[n]));
74       } else {
75         assertFalse(map.containsKey(c));
76       }
77     }
78   }
79 }
80