1/*
2 * Copyright (C) 2010 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 com.google.common.annotations.GwtCompatible;
20
21import junit.framework.TestCase;
22
23/**
24 * Unit test for {@link Ascii}.
25 *
26 * @author Craig Berry
27 */
28@GwtCompatible
29public class AsciiTest extends TestCase {
30
31  /**
32   * The Unicode points {@code 00c1} and {@code 00e1} are the upper- and
33   * lowercase forms of A-with-acute-accent, {@code Á} and {@code á}.
34   */
35  private static final String IGNORED =
36      "`10-=~!@#$%^&*()_+[]\\{}|;':\",./<>?'\u00c1\u00e1\n";
37  private static final String LOWER = "abcdefghijklmnopqrstuvwxyz";
38  private static final String UPPER = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
39
40  public void testToLowerCase() {
41    assertEquals(LOWER, Ascii.toLowerCase(UPPER));
42    assertEquals(LOWER, Ascii.toLowerCase(LOWER));
43    assertEquals(IGNORED, Ascii.toUpperCase(IGNORED));
44  }
45
46  public void testToUpperCase() {
47    assertEquals(UPPER, Ascii.toUpperCase(LOWER));
48    assertEquals(UPPER, Ascii.toUpperCase(UPPER));
49    assertEquals(IGNORED, Ascii.toUpperCase(IGNORED));
50  }
51
52  public void testCharsIgnored() {
53    for (char c : IGNORED.toCharArray()) {
54      String str = String.valueOf(c);
55      assertTrue(str, c == Ascii.toLowerCase(c));
56      assertTrue(str, c == Ascii.toUpperCase(c));
57      assertFalse(str, Ascii.isLowerCase(c));
58      assertFalse(str, Ascii.isUpperCase(c));
59    }
60  }
61
62  public void testCharsLower() {
63    for (char c : LOWER.toCharArray()) {
64      String str = String.valueOf(c);
65      assertTrue(str, c == Ascii.toLowerCase(c));
66      assertFalse(str, c == Ascii.toUpperCase(c));
67      assertTrue(str, Ascii.isLowerCase(c));
68      assertFalse(str, Ascii.isUpperCase(c));
69    }
70  }
71
72  public void testCharsUpper() {
73    for (char c : UPPER.toCharArray()) {
74      String str = String.valueOf(c);
75      assertFalse(str, c == Ascii.toLowerCase(c));
76      assertTrue(str, c == Ascii.toUpperCase(c));
77      assertFalse(str, Ascii.isLowerCase(c));
78      assertTrue(str, Ascii.isUpperCase(c));
79    }
80  }
81}
82