Java > Open Source Codes > org > apache > commons > lang > StringUtilsTrimEmptyTest


1 /*
2  * Copyright 2002-2005 The Apache Software Foundation.
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 package org.apache.commons.lang;
17
18 import junit.framework.Test;
19 import junit.framework.TestCase;
20 import junit.framework.TestSuite;
21 import junit.textui.TestRunner;
22
23 /**
24  * Unit tests {@link org.apache.commons.lang.StringUtils} - Trim/Empty methods
25  *
26  * @author <a HREF="mailto:scolebourne@joda.org">Stephen Colebourne</a>
27  * @author <a HREF="mailto:ridesmet@users.sourceforge.net">Ringo De Smet</a>
28  * @version $Id: StringUtilsTrimEmptyTest.java 161244 2005-04-14 06:16:36Z ggregory $
29  */
30 public class StringUtilsTrimEmptyTest extends TestCase {
31     private static final String FOO = "foo";
32
33     public StringUtilsTrimEmptyTest(String name) {
34         super(name);
35     }
36
37     public static void main(String [] args) {
38         TestRunner.run(suite());
39     }
40
41     public static Test suite() {
42         TestSuite suite = new TestSuite(StringUtilsTrimEmptyTest.class);
43         suite.setName("StringUtilsTrimEmpty Tests");
44         return suite;
45     }
46
47     protected void setUp() throws Exception {
48         super.setUp();
49     }
50
51     protected void tearDown() throws Exception {
52         super.tearDown();
53     }
54
55     //-----------------------------------------------------------------------
56 public void testIsEmpty() {
57         assertEquals(true, StringUtils.isEmpty(null));
58         assertEquals(true, StringUtils.isEmpty(""));
59         assertEquals(false, StringUtils.isEmpty(" "));
60         assertEquals(false, StringUtils.isEmpty("foo"));
61         assertEquals(false, StringUtils.isEmpty(" foo "));
62     }
63
64     public void testIsNotEmpty() {
65         assertEquals(false, StringUtils.isNotEmpty(null));
66         assertEquals(false, StringUtils.isNotEmpty(""));
67         assertEquals(true, StringUtils.isNotEmpty(" "));
68         assertEquals(true, StringUtils.isNotEmpty("foo"));
69         assertEquals(true, StringUtils.isNotEmpty(" foo "));
70     }
71
72     public void testIsBlank() {
73         assertEquals(true, StringUtils.isBlank(null));
74         assertEquals(true, StringUtils.isBlank(""));
75         assertEquals(true, StringUtils.isBlank(StringUtilsTest.WHITESPACE));
76         assertEquals(false, StringUtils.isBlank("foo"));
77         assertEquals(false, StringUtils.isBlank(" foo "));
78     }
79
80     public void testIsNotBlank() {
81         assertEquals(false, StringUtils.isNotBlank(null));
82         assertEquals(false, StringUtils.isNotBlank(""));
83         assertEquals(false, StringUtils.isNotBlank(StringUtilsTest.WHITESPACE));
84         assertEquals(true, StringUtils.isNotBlank("foo"));
85         assertEquals(true, StringUtils.isNotBlank(" foo "));
86     }
87
88     //-----------------------------------------------------------------------
89 public void testClean() {
90         assertEquals(FOO, StringUtils.clean(FOO + " "));
91         assertEquals(FOO, StringUtils.clean(" " + FOO + " "));
92         assertEquals(FOO, StringUtils.clean(" " + FOO));
93         assertEquals(FOO, StringUtils.clean(FOO + ""));
94         assertEquals("", StringUtils.clean(" \t\r\n\b "));
95         assertEquals("", StringUtils.clean(""));
96         assertEquals("", StringUtils.clean(null));
97     }
98
99     public void testTrim() {
100         assertEquals(FOO, StringUtils.trim(FOO + " "));
101         assertEquals(FOO, StringUtils.trim(" " + FOO + " "));
102         assertEquals(FOO, StringUtils.trim(" " + FOO));
103         assertEquals(FOO, StringUtils.trim(FOO + ""));
104         assertEquals("", StringUtils.trim(" \t\r\n\b "));
105         assertEquals("", StringUtils.trim(StringUtilsTest.TRIMMABLE));
106         assertEquals(StringUtilsTest.NON_TRIMMABLE, StringUtils.trim(StringUtilsTest.NON_TRIMMABLE));
107         assertEquals("", StringUtils.trim(""));
108         assertEquals(null, StringUtils.trim(null));
109     }
110
111     public void testTrimToNull() {
112         assertEquals(FOO, StringUtils.trimToNull(FOO + " "));
113         assertEquals(FOO, StringUtils.trimToNull(" " + FOO + " "));
114         assertEquals(FOO, StringUtils.trimToNull(" " + FOO));
115         assertEquals(FOO, StringUtils.trimToNull(FOO + ""));
116         assertEquals(null, StringUtils.trimToNull(" \t\r\n\b "));
117         assertEquals(null, StringUtils.trimToNull(StringUtilsTest.TRIMMABLE));
118         assertEquals(StringUtilsTest.NON_TRIMMABLE, StringUtils.trimToNull(StringUtilsTest.NON_TRIMMABLE));
119         assertEquals(null, StringUtils.trimToNull(""));
120         assertEquals(null, StringUtils.trimToNull(null));
121     }
122
123     public void testTrimToEmpty() {
124         assertEquals(FOO, StringUtils.trimToEmpty(FOO + " "));
125         assertEquals(FOO, StringUtils.trimToEmpty(" " + FOO + " "));
126         assertEquals(FOO, StringUtils.trimToEmpty(" " + FOO));
127         assertEquals(FOO, StringUtils.trimToEmpty(FOO + ""));
128         assertEquals("", StringUtils.trimToEmpty(" \t\r\n\b "));
129         assertEquals("", StringUtils.trimToEmpty(StringUtilsTest.TRIMMABLE));
130         assertEquals(StringUtilsTest.NON_TRIMMABLE, StringUtils.trimToEmpty(StringUtilsTest.NON_TRIMMABLE));
131         assertEquals("", StringUtils.trimToEmpty(""));
132         assertEquals("", StringUtils.trimToEmpty(null));
133     }
134
135     //-----------------------------------------------------------------------
136 public void testStrip_String() {
137         assertEquals(null, StringUtils.strip(null));
138         assertEquals("", StringUtils.strip(""));
139         assertEquals("", StringUtils.strip(" "));
140         assertEquals("abc", StringUtils.strip(" abc "));
141         assertEquals(StringUtilsTest.NON_WHITESPACE,
142             StringUtils.strip(StringUtilsTest.WHITESPACE + StringUtilsTest.NON_WHITESPACE + StringUtilsTest.WHITESPACE));
143     }
144     
145     public void testStripToNull_String() {
146         assertEquals(null, StringUtils.stripToNull(null));
147         assertEquals(null, StringUtils.stripToNull(""));
148         assertEquals(null, StringUtils.stripToNull(" "));
149         assertEquals(null, StringUtils.stripToNull(StringUtilsTest.WHITESPACE));
150         assertEquals("ab c", StringUtils.stripToNull(" ab c "));
151         assertEquals(StringUtilsTest.NON_WHITESPACE,
152             StringUtils.stripToNull(StringUtilsTest.WHITESPACE + StringUtilsTest.NON_WHITESPACE + StringUtilsTest.WHITESPACE));
153     }
154     
155     public void testStripToEmpty_String() {
156         assertEquals("", StringUtils.stripToEmpty(null));
157         assertEquals("", StringUtils.stripToEmpty(""));
158         assertEquals("", StringUtils.stripToEmpty(" "));
159         assertEquals("", StringUtils.stripToEmpty(StringUtilsTest.WHITESPACE));
160         assertEquals("ab c", StringUtils.stripToEmpty(" ab c "));
161         assertEquals(StringUtilsTest.NON_WHITESPACE,
162             StringUtils.stripToEmpty(StringUtilsTest.WHITESPACE + StringUtilsTest.NON_WHITESPACE + StringUtilsTest.WHITESPACE));
163     }
164     
165     public void testStrip_StringString() {
166         // null strip
167 assertEquals(null, StringUtils.strip(null, null));
168         assertEquals("", StringUtils.strip("", null));
169         assertEquals("", StringUtils.strip(" ", null));
170         assertEquals("abc", StringUtils.strip(" abc ", null));
171         assertEquals(StringUtilsTest.NON_WHITESPACE,
172             StringUtils.strip(StringUtilsTest.WHITESPACE + StringUtilsTest.NON_WHITESPACE + StringUtilsTest.WHITESPACE, null));
173
174         // "" strip
175 assertEquals(null, StringUtils.strip(null, ""));
176         assertEquals("", StringUtils.strip("", ""));
177         assertEquals(" ", StringUtils.strip(" ", ""));
178         assertEquals(" abc ", StringUtils.strip(" abc ", ""));
179         assertEquals(StringUtilsTest.WHITESPACE, StringUtils.strip(StringUtilsTest.WHITESPACE, ""));
180         
181         // " " strip
182 assertEquals(null, StringUtils.strip(null, " "));
183         assertEquals("", StringUtils.strip("", " "));
184         assertEquals("", StringUtils.strip(" ", " "));
185         assertEquals("abc", StringUtils.strip(" abc ", " "));
186         
187         // "ab" strip
188 assertEquals(null, StringUtils.strip(null, "ab"));
189         assertEquals("", StringUtils.strip("", "ab"));
190         assertEquals(" ", StringUtils.strip(" ", "ab"));
191         assertEquals(" abc ", StringUtils.strip(" abc ", "ab"));
192         assertEquals("c", StringUtils.strip("abcabab", "ab"));
193         assertEquals(StringUtilsTest.WHITESPACE, StringUtils.strip(StringUtilsTest.WHITESPACE, ""));
194     }
195     
196     public void testStripStart_StringString() {
197         // null stripStart
198 assertEquals(null, StringUtils.stripStart(null, null));
199         assertEquals("", StringUtils.stripStart("", null));
200         assertEquals("", StringUtils.stripStart(" ", null));
201         assertEquals("abc ", StringUtils.stripStart(" abc ", null));
202         assertEquals(StringUtilsTest.NON_WHITESPACE + StringUtilsTest.WHITESPACE,
203             StringUtils.stripStart(StringUtilsTest.WHITESPACE + StringUtilsTest.NON_WHITESPACE + StringUtilsTest.WHITESPACE, null));
204
205         // "" stripStart
206 assertEquals(null, StringUtils.stripStart(null, ""));
207         assertEquals("", StringUtils.stripStart("", ""));
208         assertEquals(" ", StringUtils.stripStart(" ", ""));
209         assertEquals(" abc ", StringUtils.stripStart(" abc ", ""));
210         assertEquals(StringUtilsTest.WHITESPACE, StringUtils.stripStart(StringUtilsTest.WHITESPACE, ""));
211         
212         // " " stripStart
213 assertEquals(null, StringUtils.stripStart(null, " "));
214         assertEquals("", StringUtils.stripStart("", " "));
215         assertEquals("", StringUtils.stripStart(" ", " "));
216         assertEquals("abc ", StringUtils.stripStart(" abc ", " "));
217         
218         // "ab" stripStart
219 assertEquals(null, StringUtils.stripStart(null, "ab"));
220         assertEquals("", StringUtils.stripStart("", "ab"));
221         assertEquals(" ", StringUtils.stripStart(" ", "ab"));
222         assertEquals(" abc ", StringUtils.stripStart(" abc ", "ab"));
223         assertEquals("cabab", StringUtils.stripStart("abcabab", "ab"));
224         assertEquals(StringUtilsTest.WHITESPACE, StringUtils.stripStart(StringUtilsTest.WHITESPACE, ""));
225     }
226     
227     public void testStripEnd_StringString() {
228         // null stripEnd
229 assertEquals(null, StringUtils.stripEnd(null, null));
230         assertEquals("", StringUtils.stripEnd("", null));
231         assertEquals("", StringUtils.stripEnd(" ", null));
232         assertEquals(" abc", StringUtils.stripEnd(" abc ", null));
233         assertEquals(StringUtilsTest.WHITESPACE + StringUtilsTest.NON_WHITESPACE,
234             StringUtils.stripEnd(StringUtilsTest.WHITESPACE + StringUtilsTest.NON_WHITESPACE + StringUtilsTest.WHITESPACE, null));
235
236         // "" stripEnd
237 assertEquals(null, StringUtils.stripEnd(null, ""));
238         assertEquals("", StringUtils.stripEnd("", ""));
239         assertEquals(" ", StringUtils.stripEnd(" ", ""));
240         assertEquals(" abc ", StringUtils.stripEnd(" abc ", ""));
241         assertEquals(StringUtilsTest.WHITESPACE, StringUtils.stripEnd(StringUtilsTest.WHITESPACE, ""));
242         
243         // " " stripEnd
244 assertEquals(null, StringUtils.stripEnd(null, " "));
245         assertEquals("", StringUtils.stripEnd("", " "));
246         assertEquals("", StringUtils.stripEnd(" ", " "));
247         assertEquals(" abc", StringUtils.stripEnd(" abc ", " "));
248         
249         // "ab" stripEnd
250 assertEquals(null, StringUtils.stripEnd(null, "ab"));
251         assertEquals("", StringUtils.stripEnd("", "ab"));
252         assertEquals(" ", StringUtils.stripEnd(" ", "ab"));
253         assertEquals(" abc ", StringUtils.stripEnd(" abc ", "ab"));
254         assertEquals("abc", StringUtils.stripEnd("abcabab", "ab"));
255         assertEquals(StringUtilsTest.WHITESPACE, StringUtils.stripEnd(StringUtilsTest.WHITESPACE, ""));
256     }
257
258     public void testStripAll() {
259         // test stripAll method, merely an array version of the above strip
260 String [] empty = new String [0];
261         String [] fooSpace = new String [] { " "+FOO+" ", " "+FOO, FOO+" " };
262         String [] fooDots = new String [] { ".."+FOO+"..", ".."+FOO, FOO+".." };
263         String [] foo = new String [] { FOO, FOO, FOO };
264
265         assertEquals(null, StringUtils.stripAll(null));
266         assertArrayEquals(empty, StringUtils.stripAll(empty));
267         assertArrayEquals(foo, StringUtils.stripAll(fooSpace));
268         
269         assertEquals(null, StringUtils.stripAll(null, null));
270         assertArrayEquals(foo, StringUtils.stripAll(fooSpace, null));
271         assertArrayEquals(foo, StringUtils.stripAll(fooDots, "."));
272     }
273
274     private void assertArrayEquals(Object [] o1, Object [] o2) {
275         if(o1 == null) {
276             assertEquals(o1,o2);
277             return;
278         }
279         assertEquals("Length not equal. ", o1.length, o2.length);
280         int sz = o1.length;
281         for(int i=0; i<sz; i++) {
282             if(o1[i] instanceof Object []) {
283                 // do an assert equals on type....
284 assertArrayEquals( (Object []) o1[i], (Object []) o2[i] );
285             } else {
286                 assertEquals(o1[i], o2[i]);
287             }
288         }
289     }
290
291 }
292

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