Source Code Cross Referenced for TestTextAccess.java in  » Parser » JTopas » de » susebox » jtopas » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Parser » JTopas » de.susebox.jtopas 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * TestTextAccess.java: JUnit test for the InputStreamTokenizer
003:         *
004:         * Copyright (C) 2002 Heiko Blau
005:         *
006:         * This file belongs to the JTopas test suite.
007:         * The JTopas test suite is free software; you can redistribute it and/or modify it 
008:         * under the terms of the GNU Lesser General Public License as published by the 
009:         * Free Software Foundation; either version 2.1 of the License, or (at your option) 
010:         * any later version.
011:         *
012:         * This software is distributed in the hope that it will be useful, but WITHOUT
013:         * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
014:         * FITNESS FOR A PARTICULAR PURPOSE. 
015:         * See the GNU Lesser General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU Lesser General Public License along 
018:         * with the JTopas test suite. If not, write to the
019:         *
020:         *   Free Software Foundation, Inc.
021:         *   59 Temple Place, Suite 330, 
022:         *   Boston, MA 02111-1307 
023:         *   USA
024:         *
025:         * or check the Internet: http://www.fsf.org
026:         *
027:         * The JTopas test suite uses the test framework JUnit by Kent Beck and Erich Gamma.
028:         * You should have received a copy of their JUnit licence agreement along with 
029:         * the JTopas test suite.
030:         *
031:         * We do NOT provide the JUnit archive junit.jar nessecary to compile and run 
032:         * our tests, since we assume, that You  either have it already or would like 
033:         * to get the current release Yourself. 
034:         * Please visit either:
035:         *   http://sourceforge.net/projects/junit
036:         * or
037:         *   http://junit.org
038:         * to obtain JUnit.
039:         *
040:         * Contact:
041:         *   email: heiko@susebox.de 
042:         */
043:
044:        package de.susebox.jtopas;
045:
046:        //-----------------------------------------------------------------------------
047:        // Imports
048:        //
049:        import java.util.Iterator;
050:        import java.io.Reader;
051:        import java.io.StringReader;
052:
053:        import junit.framework.Test;
054:        import junit.framework.TestCase;
055:        import junit.framework.TestSuite;
056:        import junit.framework.Assert;
057:
058:        import de.susebox.java.lang.ExtRuntimeException;
059:
060:        import de.susebox.TestUtilities;
061:
062:        //-----------------------------------------------------------------------------
063:        // Class TestTextAccess
064:        //
065:
066:        /**<p>
067:         * This class tests the input data access of a {@link Tokenizer} and the setting
068:         * of the read position. 
069:         *</p>
070:         *
071:         * @see     Tokenizer
072:         * @see     AbstractTokenizer
073:         * @author  Heiko Blau
074:         */
075:        public class TestTextAccess extends TestCase {
076:
077:            //---------------------------------------------------------------------------
078:            // main method
079:            //
080:
081:            /**
082:             * call this method to invoke the tests
083:             */
084:            public static void main(String[] args) {
085:                String[] tests = { TestTextAccess.class.getName() };
086:
087:                TestUtilities.run(tests, args);
088:            }
089:
090:            //---------------------------------------------------------------------------
091:            // suite method
092:            //
093:
094:            /**
095:             * Implementation of the JUnit method <code>suite</code>. For each set of test
096:             * properties one or more tests are instantiated.
097:             *
098:             * @return a test suite
099:             */
100:            public static Test suite() {
101:                TestSuite suite = new TestSuite(TestTextAccess.class.getName());
102:
103:                suite.addTest(new TestTextAccess("testGetText"));
104:                suite.addTest(new TestTextAccess("testSetReadPos"));
105:                return suite;
106:            }
107:
108:            //---------------------------------------------------------------------------
109:            // Constructor
110:            //
111:
112:            /**
113:             * Default constructor. Standard input {@link java.lang.System#in} is used
114:             * to construct the input stream reader.
115:             */
116:            public TestTextAccess(String test) {
117:                super (test);
118:            }
119:
120:            //---------------------------------------------------------------------------
121:            // Fixture setup and release
122:            //
123:
124:            /**
125:             * Sets up the fixture, for example, open a network connection.
126:             * This method is called before a test is executed.
127:             */
128:            protected void setUp() throws Exception {
129:                _properties = new StandardTokenizerProperties();
130:                _tokenizer = new StandardTokenizer(_properties);
131:
132:                _properties.setParseFlags(_properties.getParseFlags()
133:                        | Flags.F_KEEP_DATA | Flags.F_RETURN_WHITESPACES);
134:                _properties.addString("'", "'", "\\");
135:                _properties.addString("\"", "\"", "\\");
136:            }
137:
138:            /**
139:             * Tears down the fixture, for example, close a network connection.
140:             * This method is called after a test is executed.
141:             */
142:            protected void tearDown() throws Exception {
143:                _tokenizer.close();
144:            }
145:
146:            //---------------------------------------------------------------------------
147:            // test cases
148:            //
149:
150:            /**
151:             * Testing various direct text access things. Moreover, the determination of
152:             * the read position is tested.
153:             */
154:            public void testGetText() throws Throwable {
155:                String text = "A text to parse.";
156:                Reader reader = new StringReader(text);
157:
158:                // setting the input stream
159:                _tokenizer.setSource(reader);
160:                _tokenizer.readMore();
161:
162:                // checking ranges and positions
163:                int startPos = _tokenizer.getRangeStart();
164:                int readPos = _tokenizer.getReadPosition();
165:
166:                assertTrue("Current read position " + readPos
167:                        + " differs from range start + " + startPos + ".",
168:                        startPos == readPos);
169:                assertTrue("Current range " + _tokenizer.currentlyAvailable()
170:                        + " differs from text length " + text.length() + ".",
171:                        _tokenizer.currentlyAvailable() == text.length());
172:
173:                // Check the moving of the read position
174:                while (_tokenizer.hasMoreToken()) {
175:                    Token token = _tokenizer.nextToken();
176:
177:                    assertTrue(
178:                            "Current read position did not move by length of token "
179:                                    + token.getLength() + ". Moved by "
180:                                    + (_tokenizer.getReadPosition() - readPos)
181:                                    + ".", _tokenizer.getReadPosition()
182:                                    - readPos == token.getLength());
183:                    readPos = _tokenizer.getReadPosition();
184:                }
185:
186:                // retrieving text
187:                String readText = _tokenizer.getText(0, text.length());
188:                assertTrue("Retrieved different text \"" + readText + "\".",
189:                        readText.equals(text));
190:
191:                // retrieving text piecewise
192:                for (int pos = 0; pos < text.length(); ++pos) {
193:                    for (int len = 0; len < _tokenizer.currentlyAvailable()
194:                            - pos; ++len) {
195:                        readText = _tokenizer.getText(pos, len);
196:                        assertTrue("Expected \""
197:                                + text.substring(pos, pos + len)
198:                                + "\", found \"" + readText + "\".", readText
199:                                .equals(text.substring(pos, pos + len)));
200:                    }
201:                }
202:
203:                // retrieving text characters
204:                for (int pos = 0; pos < text.length(); ++pos) {
205:                    char ch = _tokenizer.getChar(pos);
206:
207:                    assertTrue("Expected '" + text.charAt(pos) + "', found '"
208:                            + ch + "'.", ch == text.charAt(pos));
209:                }
210:            }
211:
212:            /**
213:             * Testing various direct text access things. Moreover, the determination of
214:             * the read position is tested.
215:             */
216:            public void testSetReadPos() throws Throwable {
217:                String text = "A text to parse.";
218:                Reader reader = new StringReader(text);
219:
220:                // setting the input stream
221:                _tokenizer.setSource(reader);
222:                _tokenizer.readMore();
223:
224:                // Check relative setting of the read position
225:                while (_tokenizer.hasMoreToken()) {
226:                    Token token = _tokenizer.nextToken();
227:                    String image = _tokenizer.currentImage();
228:                    int retry = 0;
229:
230:                    if (token.getType() == Token.EOF) {
231:                        break;
232:                    }
233:                    while (retry++ < 10) {
234:                        Token token2;
235:
236:                        _tokenizer.setReadPositionRelative(-token.getLength());
237:                        assertTrue("Should have another token.", _tokenizer
238:                                .hasMoreToken());
239:                        token2 = _tokenizer.nextToken();
240:                        assertTrue("Retrieved unexpected token \""
241:                                + _tokenizer.currentImage()
242:                                + "\" instead of \"" + image + "\".", token
243:                                .equals(token2));
244:                    }
245:                }
246:
247:                // Check absolute setting of the read position
248:                _tokenizer.setReadPositionAbsolute(0);
249:                assertTrue(_tokenizer.getReadPosition() == 0);
250:
251:                while (_tokenizer.hasMoreToken()) {
252:                    Token token = _tokenizer.nextToken();
253:                    String image = _tokenizer.currentImage();
254:                    int startPos = token.getStartPosition();
255:                    int retry = 0;
256:
257:                    if (token.getType() == Token.EOF) {
258:                        break;
259:                    }
260:                    while (retry++ < 10) {
261:                        Token token2;
262:
263:                        _tokenizer.setReadPositionAbsolute(startPos);
264:                        assertTrue("Should have another token.", _tokenizer
265:                                .hasMoreToken());
266:                        token2 = _tokenizer.nextToken();
267:                        assertTrue("Retrieved unexpected token \""
268:                                + _tokenizer.currentImage()
269:                                + "\" instead of \"" + image + "\".", token
270:                                .equals(token2));
271:                    }
272:                }
273:            }
274:
275:            //---------------------------------------------------------------------------
276:            // Members
277:            //
278:            private StandardTokenizer _tokenizer = null;
279:            private TokenizerProperties _properties = null;
280:        }
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