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
17package com.google.common.escape;
18
19import com.google.common.annotations.GwtCompatible;
20import com.google.common.collect.ImmutableMap;
21
22import junit.framework.TestCase;
23
24import java.util.Map;
25
26/**
27 * @author David Beaumont
28 */
29@GwtCompatible
30public class ArrayBasedEscaperMapTest extends TestCase {
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
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
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
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