Source Code Cross Referenced for TestConfigurationInterpolator.java in  » Library » Apache-commons-configuration-1.4-src » org » apache » commons » configuration » interpol » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Library » Apache commons configuration 1.4 src » org.apache.commons.configuration.interpol 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         *
009:         *     http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */
017:        package org.apache.commons.configuration.interpol;
018:
019:        import java.util.HashMap;
020:        import java.util.Iterator;
021:        import java.util.Map;
022:        import java.util.Properties;
023:
024:        import org.apache.commons.lang.text.StrLookup;
025:
026:        import junit.framework.TestCase;
027:
028:        /**
029:         * Test class for ConfigurationInterpolator.
030:         *
031:         * @version $Id: TestConfigurationInterpolator.java 490375 2006-12-26 21:28:04Z oheger $
032:         */
033:        public class TestConfigurationInterpolator extends TestCase {
034:            /** Constant for a test variable prefix. */
035:            private static final String TEST_PREFIX = "prefix";
036:
037:            /** Constant for a test variable name. */
038:            private static final String TEST_NAME = "varname";
039:
040:            /** Constant for the value of the test variable. */
041:            private static final String TEST_VALUE = "TestVariableValue";
042:
043:            /** Stores the object to be tested. */
044:            private ConfigurationInterpolator interpolator;
045:
046:            protected void setUp() throws Exception {
047:                super .setUp();
048:                interpolator = new ConfigurationInterpolator();
049:            }
050:
051:            /**
052:             * Cleans the test environment. Deregisters the test lookup object if
053:             * necessary.
054:             */
055:            protected void tearDown() throws Exception {
056:                ConfigurationInterpolator.deregisterGlobalLookup(TEST_PREFIX);
057:            }
058:
059:            /**
060:             * Tests creating an instance. Does it contain some predefined lookups?
061:             */
062:            public void testInit() {
063:                assertNull("A default lookup is set", interpolator
064:                        .getDefaultLookup());
065:                assertFalse("No predefined lookups", interpolator.prefixSet()
066:                        .isEmpty());
067:            }
068:
069:            /**
070:             * Tries to register a global lookup for a null prefix. This should cause an
071:             * exception.
072:             */
073:            public void testRegisterGlobalLookupNullPrefix() {
074:                try {
075:                    ConfigurationInterpolator.registerGlobalLookup(null,
076:                            StrLookup.noneLookup());
077:                    fail("Could register global lookup with null prefix!");
078:                } catch (IllegalArgumentException iex) {
079:                    // ok
080:                }
081:            }
082:
083:            /**
084:             * Tries to register a global null lookup. This should cause an exception.
085:             */
086:            public void testRegisterGlobalLookupNull() {
087:                try {
088:                    ConfigurationInterpolator.registerGlobalLookup(TEST_PREFIX,
089:                            null);
090:                    fail("Could register global null lookup!");
091:                } catch (IllegalArgumentException iex) {
092:                    // ok
093:                }
094:            }
095:
096:            /**
097:             * Tests registering a global lookup object. This lookup object should then
098:             * be available for instances created later on.
099:             */
100:            public void testRegisterGlobalLookup() {
101:                ConfigurationInterpolator.registerGlobalLookup(TEST_PREFIX,
102:                        StrLookup.noneLookup());
103:                ConfigurationInterpolator int2 = new ConfigurationInterpolator();
104:                assertTrue("No lookup registered for test prefix", int2
105:                        .prefixSet().contains(TEST_PREFIX));
106:                assertFalse("Existing instance was modified", interpolator
107:                        .prefixSet().contains(TEST_PREFIX));
108:            }
109:
110:            /**
111:             * Tests deregistering a global lookup object.
112:             */
113:            public void testDeregisterGlobalLookup() {
114:                ConfigurationInterpolator.registerGlobalLookup(TEST_PREFIX,
115:                        StrLookup.noneLookup());
116:                assertTrue("Lookup could not be deregistered",
117:                        ConfigurationInterpolator
118:                                .deregisterGlobalLookup(TEST_PREFIX));
119:                ConfigurationInterpolator int2 = new ConfigurationInterpolator();
120:                assertFalse("Deregistered lookup still available", int2
121:                        .prefixSet().contains(TEST_PREFIX));
122:            }
123:
124:            /**
125:             * Tests deregistering an unknown lookup.
126:             */
127:            public void testDeregisterGlobalLookupNonExisting() {
128:                assertFalse("Could deregister unknown global lookup",
129:                        ConfigurationInterpolator
130:                                .deregisterGlobalLookup(TEST_PREFIX));
131:            }
132:
133:            /**
134:             * Tests registering a lookup object at an instance.
135:             */
136:            public void testRegisterLookup() {
137:                int cnt = interpolator.prefixSet().size();
138:                interpolator
139:                        .registerLookup(TEST_PREFIX, StrLookup.noneLookup());
140:                assertTrue("New lookup not registered", interpolator
141:                        .prefixSet().contains(TEST_PREFIX));
142:                assertEquals("Wrong number of registered lookups", cnt + 1,
143:                        interpolator.prefixSet().size());
144:                ConfigurationInterpolator int2 = new ConfigurationInterpolator();
145:                assertFalse("Local registration has global impact", int2
146:                        .prefixSet().contains(TEST_PREFIX));
147:            }
148:
149:            /**
150:             * Tests registering a null lookup object. This should cause an exception.
151:             */
152:            public void testRegisterLookupNull() {
153:                try {
154:                    interpolator.registerLookup(TEST_PREFIX, null);
155:                    fail("Could register null lookup!");
156:                } catch (IllegalArgumentException iex) {
157:                    // ok
158:                }
159:            }
160:
161:            /**
162:             * Tests registering a lookup object for an undefined prefix. This should
163:             * cause an exception.
164:             */
165:            public void testRegisterLookupNullPrefix() {
166:                try {
167:                    interpolator.registerLookup(null, StrLookup.noneLookup());
168:                    fail("Could register lookup for null prefix!");
169:                } catch (IllegalArgumentException iex) {
170:                    // ok
171:                }
172:            }
173:
174:            /**
175:             * Tests deregistering a local lookup object.
176:             */
177:            public void testDeregisterLookup() {
178:                interpolator
179:                        .registerLookup(TEST_PREFIX, StrLookup.noneLookup());
180:                assertTrue("Derigstration not successfull", interpolator
181:                        .deregisterLookup(TEST_PREFIX));
182:                assertFalse("Deregistered prefix still contained", interpolator
183:                        .prefixSet().contains(TEST_PREFIX));
184:            }
185:
186:            /**
187:             * Tests deregistering an unknown lookup object.
188:             */
189:            public void testDeregisterLookupNonExisting() {
190:                assertFalse("Could deregister unknown lookup", interpolator
191:                        .deregisterLookup(TEST_PREFIX));
192:            }
193:
194:            /**
195:             * Tests whether a variable can be resolved using the associated lookup
196:             * object. The lookup is identified by the variable's prefix.
197:             */
198:            public void testLookupWithPrefix() {
199:                interpolator.registerLookup(TEST_PREFIX, setUpTestLookup());
200:                assertEquals("Wrong variable value", TEST_VALUE, interpolator
201:                        .lookup(TEST_PREFIX + ':' + TEST_NAME));
202:            }
203:
204:            /**
205:             * Tests the behavior of the lookup method for variables with an unknown
206:             * prefix. These variables should not be resolved.
207:             */
208:            public void testLookupWithUnknownPrefix() {
209:                interpolator.registerLookup(TEST_PREFIX, setUpTestLookup());
210:                assertNull("Variable could be resolved", interpolator
211:                        .lookup("UnknownPrefix:" + TEST_NAME));
212:                assertNull("Variable with empty prefix could be resolved",
213:                        interpolator.lookup(":" + TEST_NAME));
214:            }
215:
216:            /**
217:             * Tests looking up a variable without a prefix. This should trigger the
218:             * default lookup object.
219:             */
220:            public void testLookupDefault() {
221:                interpolator.setDefaultLookup(setUpTestLookup());
222:                assertEquals("Wrong variable value", TEST_VALUE, interpolator
223:                        .lookup(TEST_NAME));
224:            }
225:
226:            /**
227:             * Tests looking up a variable without a prefix when no default lookup is
228:             * specified. Result should be null in this case.
229:             */
230:            public void testLookupNoDefault() {
231:                assertNull("Variable could be resolved", interpolator
232:                        .lookup(TEST_NAME));
233:            }
234:
235:            /**
236:             * Tests the empty variable prefix. This is a special case, but legal.
237:             */
238:            public void testLookupEmptyPrefix() {
239:                interpolator.registerLookup("", setUpTestLookup());
240:                assertEquals("Wrong variable value", TEST_VALUE, interpolator
241:                        .lookup(":" + TEST_NAME));
242:            }
243:
244:            /**
245:             * Tests an empty variable name.
246:             */
247:            public void testLookupEmptyVarName() {
248:                Map map = new HashMap();
249:                map.put("", TEST_VALUE);
250:                interpolator.registerLookup(TEST_PREFIX, StrLookup
251:                        .mapLookup(map));
252:                assertEquals("Wrong variable value", TEST_VALUE, interpolator
253:                        .lookup(TEST_PREFIX + ":"));
254:            }
255:
256:            /**
257:             * Tests an empty variable name without a prefix.
258:             */
259:            public void testLookupDefaultEmptyVarName() {
260:                Map map = new HashMap();
261:                map.put("", TEST_VALUE);
262:                interpolator.setDefaultLookup(StrLookup.mapLookup(map));
263:                assertEquals("Wrong variable value", TEST_VALUE, interpolator
264:                        .lookup(""));
265:            }
266:
267:            /**
268:             * Tests looking up a null variable. Result shoult be null, too.
269:             */
270:            public void testLookupNull() {
271:                assertNull("Could resolve null variable", interpolator
272:                        .lookup(null));
273:            }
274:
275:            /**
276:             * Creates a lookup object that can resolve the test variable.
277:             *
278:             * @return the test lookup object
279:             */
280:            private StrLookup setUpTestLookup() {
281:                Map map = new HashMap();
282:                map.put(TEST_NAME, TEST_VALUE);
283:                return StrLookup.mapLookup(map);
284:            }
285:
286:            /**
287:             * Tests whether system properties can be correctly resolved.
288:             */
289:            public void testLookupSysProperties() {
290:                Properties sysProps = System.getProperties();
291:                for (Iterator it = sysProps.keySet().iterator(); it.hasNext();) {
292:                    String key = (String) it.next();
293:                    assertEquals(
294:                            "Wrong value for system property " + key,
295:                            sysProps.getProperty(key),
296:                            interpolator
297:                                    .lookup(ConfigurationInterpolator.PREFIX_SYSPROPERTIES
298:                                            + ":" + key));
299:                }
300:            }
301:
302:            /**
303:             * Tests whether constants can be correctly resolved.
304:             */
305:            public void testLookupConstants() {
306:                String varName = ConfigurationInterpolator.class.getName()
307:                        + ".PREFIX_CONSTANTS";
308:                assertEquals(
309:                        "Wrong constant value",
310:                        ConfigurationInterpolator.PREFIX_CONSTANTS,
311:                        interpolator
312:                                .lookup(ConfigurationInterpolator.PREFIX_CONSTANTS
313:                                        + ":" + varName));
314:            }
315:        }
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