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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 
17 package com.google.common.base;
18 
19 import com.google.common.annotations.GwtCompatible;
20 
21 import junit.framework.TestCase;
22 
23 /**
24  * Unit test for {@link Ascii}.
25  *
26  * @author Craig Berry
27  */
28 @GwtCompatible
29 public 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 
testToLowerCase()40   public void testToLowerCase() {
41     assertEquals(LOWER, Ascii.toLowerCase(UPPER));
42     assertEquals(LOWER, Ascii.toLowerCase(LOWER));
43     assertEquals(IGNORED, Ascii.toUpperCase(IGNORED));
44   }
45 
testToUpperCase()46   public void testToUpperCase() {
47     assertEquals(UPPER, Ascii.toUpperCase(LOWER));
48     assertEquals(UPPER, Ascii.toUpperCase(UPPER));
49     assertEquals(IGNORED, Ascii.toUpperCase(IGNORED));
50   }
51 
testCharsIgnored()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 
testCharsLower()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 
testCharsUpper()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