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1 /* 2 * $Header: /home/cvs/jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/core/AssertTag.java,v 1.8 2002/07/06 13:53:39 dion Exp $ 3 * $Revision: 1.8 $ 4 * $Date: 2002/07/06 13:53:39 $ 5 * 6 * ==================================================================== 7 * 8 * The Apache Software License, Version 1.1 9 * 10 * Copyright (c) 1999-2002 The Apache Software Foundation. All rights 11 * reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in 22 * the documentation and/or other materials provided with the 23 * distribution. 24 * 25 * 3. The end-user documentation included with the redistribution, if 26 * any, must include the following acknowlegement: 27 * "This product includes software developed by the 28 * Apache Software Foundation (http://www.apache.org/)." 29 * Alternately, this acknowlegement may appear in the software itself, 30 * if and wherever such third-party acknowlegements normally appear. 31 * 32 * 4. The names "The Jakarta Project", "Commons", and "Apache Software 33 * Foundation" must not be used to endorse or promote products derived 34 * from this software without prior written permission. For written 35 * permission, please contact apache@apache.org. 36 * 37 * 5. Products derived from this software may not be called "Apache" 38 * nor may "Apache" appear in their names without prior written 39 * permission of the Apache Group. 40 * 41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 52 * SUCH DAMAGE. 53 * ==================================================================== 54 * 55 * This software consists of voluntary contributions made by many 56 * individuals on behalf of the Apache Software Foundation. For more 57 * information on the Apache Software Foundation, please see 58 * <http://www.apache.org/>;. 59 * 60 * $Id: AssertTag.java,v 1.8 2002/07/06 13:53:39 dion Exp $ 61 */ 62 package org.apache.commons.jelly.tags.junit; 63 64 import org.apache.commons.jelly.XMLOutput; 65 import org.apache.commons.jelly.MissingAttributeException; 66 import org.apache.commons.jelly.expression.Expression; 67 68 import org.apache.commons.logging.Log; 69 import org.apache.commons.logging.LogFactory; 70 71 72 import org.jaxen.XPath; 73 74 /*** 75 * Performs an assertion that a given boolean expression, or XPath expression is 76 * true. If the expression returns false then this test fails. 77 * 78 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> 79 * @version $Revision: 1.8 $ 80 */ 81 public class AssertTag extends AssertTagSupport { 82 83 /*** The Log to which logging calls will be made. */ 84 private static final Log log = LogFactory.getLog(AssertTag.class); 85 86 /*** The expression to evaluate. */ 87 private Expression test; 88 89 /*** The XPath expression to evaluate */ 90 private XPath xpath; 91 92 public AssertTag() { 93 } 94 95 // Tag interface 96 //------------------------------------------------------------------------- 97 public void doTag(XMLOutput output) throws Exception { 98 if (test == null && xpath == null) { 99 throw new MissingAttributeException( "test" ); 100 } 101 if (test != null) { 102 if (! test.evaluateAsBoolean(context)) { 103 fail( getBodyText(), "evaluating test: "+ test ); 104 } 105 } 106 else { 107 Object xpathContext = getXPathContext(); 108 if (! xpath.booleanValueOf(xpathContext)) { 109 fail( getBodyText(), "evaluating xpath: "+ xpath ); 110 } 111 } 112 113 } 114 115 // Properties 116 //------------------------------------------------------------------------- 117 118 /*** 119 * Sets the boolean expression to evaluate. If this expression returns true 120 * then the test succeeds otherwise if it returns false then the text will 121 * fail with the content of the tag being the error message. 122 */ 123 public void setTest(Expression test) { 124 this.test = test; 125 } 126 127 /*** 128 * Sets the boolean XPath expression to evaluate. If this expression returns true 129 * then the test succeeds otherwise if it returns false then the text will 130 * fail with the content of the tag being the error message. 131 */ 132 public void setXpath(XPath xpath) { 133 this.xpath = xpath; 134 } 135 }

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