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1
51 package org.apache.avalon.framework.context.test;
52
53 import junit.framework.AssertionFailedError;
54 import junit.framework.TestCase;
55
56 import org.apache.avalon.framework.context.Context;
57 import org.apache.avalon.framework.context.ContextException;
58 import org.apache.avalon.framework.context.DefaultContext;
59 import org.apache.avalon.framework.context.Resolvable;
60
61
67 public class ContextTestCase
68 extends TestCase
69 {
70 private static class ResolvableString implements Resolvable
71 {
72 private final String  m_content;
73
74 public ResolvableString( final String content )
75 {
76 this.m_content = content;
77 }
78
79 public ResolvableString()
80 {
81 this( "This is a ${test}." );
82 }
83
84 public final Object resolve( final Context context )
85 throws ContextException
86 {
87 int index = this.m_content.indexOf( "${" );
88
89 if ( index < 0 )
90 {
91 return this.m_content;
92 }
93
94 StringBuffer buf = new StringBuffer ( this.m_content.substring( 0, index ) );
95
96 while ( index >= 0 && index <= this.m_content.length() )
97 {
98 index += 2;
99 int end = this.m_content.indexOf( "}", index);
100
101 if ( end < 0 )
102 {
103 end = this.m_content.length();
104 }
105
106 buf.append( context.get( this.m_content.substring( index, end ) ) );
107 end++;
108
109 index = this.m_content.indexOf( "${", end ) + 2;
110
111 if ( index < 2 )
112 {
113 index = -1;
114 buf.append( this.m_content.substring( end, this.m_content.length() ) );
115 }
116
117 if ( index >=0 && index <= this.m_content.length() )
118 {
119 buf.append( this.m_content.substring( end, index ) );
120 }
121 }
122
123 return buf.toString();
124 }
125 }
126
127 public ContextTestCase( final String name )
128 {
129 super( name );
130 }
131
132 public void testAddContext()
133 throws Exception
134 {
135 final DefaultContext context = new DefaultContext();
136 context.put( "key1", "value1" );
137 assertTrue( "value1".equals( context.get( "key1" ) ) );
138 context.put( "key1", "" );
139 assertTrue( "".equals( context.get( "key1" ) ) );
140
141 context.put( "key1", "value1" );
142 context.makeReadOnly();
143
144 try
145 {
146 context.put( "key1", "" );
147 throw new AssertionFailedError( "You are not allowed to change a value after it has been made read only" );
148 }
149 catch ( IllegalStateException ise )
150 {
151 assertTrue( "Value is null", "value1".equals( context.get( "key1" ) ) );
152 }
153 }
154
155 public void testResolveableObject()
156 throws ContextException
157 {
158 final DefaultContext context = new DefaultContext();
159 context.put( "key1", new ResolvableString() );
160 context.put( "test", "Cool Test" );
161 context.makeReadOnly();
162
163 final Context newContext = (Context) context;
164 assertTrue( "Cool Test".equals( newContext.get( "test" ) ) );
165 assertTrue( ! "This is a ${test}.".equals( newContext.get( "key1" ) ) );
166 assertTrue( "This is a Cool Test.".equals( newContext.get( "key1" ) ) );
167 }
168
169 public void testCascadingContext()
170 throws ContextException
171 {
172 final DefaultContext parent = new DefaultContext();
173 parent.put( "test", "ok test" );
174 parent.makeReadOnly();
175 final DefaultContext child = new DefaultContext( parent );
176 child.put( "check", new ResolvableString("This is an ${test}.") );
177 child.makeReadOnly();
178 final Context context = (Context) child;
179
180 assertTrue ( "ok test".equals( context.get( "test" ) ) );
181 assertTrue ( ! "This is an ${test}.".equals( context.get( "check" ) ) );
182 assertTrue ( "This is an ok test.".equals( context.get( "check" ) ) );
183 }
184
185 public void testHiddenItems()
186 throws ContextException
187 {
188 final DefaultContext parent = new DefaultContext();
189 parent.put( "test", "test" );
190 parent.makeReadOnly();
191 final DefaultContext child = new DefaultContext( parent );
192 child.put( "check", "check" );
193 final Context context = (Context) child;
194
195 assertTrue ( "check".equals( context.get( "check" ) ) );
196 assertTrue ( "test".equals( context.get( "test" ) ) );
197
198 child.hide( "test" );
199 try
200 {
201 context.get( "test" );
202 fail( "The item \"test\" was hidden in the child context, but could still be retrieved via get()." );
203 }
204 catch (ContextException ce)
205 {
206 }
208
209 child.makeReadOnly();
210
211 try
212 {
213 child.hide( "test" );
214 fail( "hide() did not throw an exception, even though the context is supposed to be read-only." );
215 }
216 catch (IllegalStateException ise)
217 {
218 }
220 }
221 }
222 |
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