svn commit: r220023 - /jakarta/commons/proper/jelly/trunk/src/test/org/apache/commons/jelly/core/TestUnexpectedTagCaching.java

[pr...@apache.org]

Author: proyal
Date: Thu Jul 21 02:10:02 2005
New Revision: 220023

URL: http://svn.apache.org/viewcvs?rev=220023&view=rev
Log:
Test case to illustrate regression first noted by Kristofer Eriksson in that tags
will expect to start from a baseline state upon each invocation

Added:
    jakarta/commons/proper/jelly/trunk/src/test/org/apache/commons/jelly/core/TestUnexpectedTagCaching.java

Added: jakarta/commons/proper/jelly/trunk/src/test/org/apache/commons/jelly/core/TestUnexpectedTagCaching.java
URL: http://svn.apache.org/viewcvs/jakarta/commons/proper/jelly/trunk/src/test/org/apache/commons/jelly/core/TestUnexpectedTagCaching.java?rev=220023&view=auto
==============================================================================
--- jakarta/commons/proper/jelly/trunk/src/test/org/apache/commons/jelly/core/TestUnexpectedTagCaching.java (added)
+++ jakarta/commons/proper/jelly/trunk/src/test/org/apache/commons/jelly/core/TestUnexpectedTagCaching.java Thu Jul 21 02:10:02 2005
@@ -0,0 +1,118 @@
+/*
+ * Copyright 2005 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.jelly.core;
+
+import java.io.StringReader;
+import java.io.StringWriter;
+import java.util.List;
+import java.util.ArrayList;
+
+import org.apache.commons.jelly.JellyContext;
+import org.apache.commons.jelly.JellyTagException;
+import org.apache.commons.jelly.MissingAttributeException;
+import org.apache.commons.jelly.Script;
+import org.apache.commons.jelly.TagLibrary;
+import org.apache.commons.jelly.TagSupport;
+import org.apache.commons.jelly.XMLOutput;
+
+import junit.framework.TestCase;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+
+/**
+ * This test illustrates pre-1.0 Jelly behavior that did not cache tags by default. Many user tag implementations
+ * will assume that they are at an initalized state when doTag() is called, rather than still being "dirty" from a
+ * prior run.
+ *
+ * @author <a href="mailto:proyal@apache.org">peter royal</a>
+ */
+public class TestUnexpectedTagCaching extends TestCase
+{
+    public void testExpectFreshTagOnEachRun() throws Exception
+    {
+        final JellyContext scriptContext = new JellyContext();
+
+        scriptContext.registerTagLibrary( "a", new TestCachingTagLibrary() );
+
+        final String scriptText = "<a:write xmlns:a=\"a\"><a:set>${message}</a:set></a:write>";
+        final Script script = scriptContext.compileScript( new InputSource( new StringReader( scriptText ) ) );
+
+        assertScriptResult( "one", script, scriptContext );
+        assertScriptResult( "two", script, scriptContext );
+        assertScriptResult( "three", script, scriptContext );
+    }
+
+    private static void assertScriptResult( final String message,
+                                            final Script script,
+                                            final JellyContext scriptContext ) throws JellyTagException
+    {
+        final JellyContext context = new JellyContext( scriptContext );
+
+        context.setVariable( "message", message );
+
+        final StringWriter writer = new StringWriter();
+
+        script.run( context, XMLOutput.createXMLOutput( writer ) );
+
+        assertEquals( "["+ message  + "]", writer.toString() );
+    }
+
+    public static class TestCachingTagLibrary extends TagLibrary
+    {
+        public TestCachingTagLibrary()
+        {
+            registerTag( "set", SetTag.class );
+            registerTag( "write", WriteTag.class );
+        }
+    }
+
+    public static class WriteTag extends TagSupport
+    {
+        private List m_strings = new ArrayList();
+
+        public List getStrings()
+        {
+            return m_strings;
+        }
+
+        public void addString( final String string )
+        {
+            m_strings.add( string );
+        }
+
+        public void doTag( final XMLOutput output ) throws MissingAttributeException, JellyTagException
+        {
+            invokeBody( output );
+
+            try
+            {
+                output.write( getStrings().toString() );
+            }
+            catch( SAXException e )
+            {
+                throw new JellyTagException( "Unable to write message", e );
+            }
+        }
+    }
+
+    public static class SetTag extends TagSupport
+    {
+        public void doTag( final XMLOutput output ) throws MissingAttributeException, JellyTagException
+        {
+            ( (WriteTag)getParent() ).addString( getBodyText() );
+        }
+    }
+}
\ No newline at end of file



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