1   /*
2    $Id: GStringTest.java,v 1.12 2005/11/13 16:42:14 blackdrag Exp $
3   
4    Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
5   
6    Redistribution and use of this software and associated documentation
7    ("Software"), with or without modification, are permitted provided
8    that the following conditions are met:
9   
10   1. Redistributions of source code must retain copyright
11      statements and notices.  Redistributions must also contain a
12      copy of this document.
13  
14   2. Redistributions in binary form must reproduce the
15      above copyright notice, this list of conditions and the
16      following disclaimer in the documentation and/or other
17      materials provided with the distribution.
18  
19   3. The name "groovy" must not be used to endorse or promote
20      products derived from this Software without prior written
21      permission of The Codehaus.  For written permission,
22      please contact info@codehaus.org.
23  
24   4. Products derived from this Software may not be called "groovy"
25      nor may "groovy" appear in their names without prior written
26      permission of The Codehaus. "groovy" is a registered
27      trademark of The Codehaus.
28  
29   5. Due credit should be given to The Codehaus -
30      http://groovy.codehaus.org/
31  
32   THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
33   ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
34   NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
35   FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
36   THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43   OF THE POSSIBILITY OF SUCH DAMAGE.
44  
45   */
46  
47  package org.codehaus.groovy.classgen;
48  
49  import org.codehaus.groovy.ast.ClassHelper;
50  import org.codehaus.groovy.ast.ClassNode;
51  import org.codehaus.groovy.ast.MethodNode;
52  import org.codehaus.groovy.ast.Parameter;
53  import org.codehaus.groovy.ast.expr.BinaryExpression;
54  import org.codehaus.groovy.ast.expr.BooleanExpression;
55  import org.codehaus.groovy.ast.expr.ConstantExpression;
56  import org.codehaus.groovy.ast.expr.GStringExpression;
57  import org.codehaus.groovy.ast.expr.MethodCallExpression;
58  import org.codehaus.groovy.ast.expr.VariableExpression;
59  import org.codehaus.groovy.ast.stmt.AssertStatement;
60  import org.codehaus.groovy.ast.stmt.BlockStatement;
61  import org.codehaus.groovy.ast.stmt.ExpressionStatement;
62  import org.codehaus.groovy.runtime.InvokerHelper;
63  import org.codehaus.groovy.runtime.InvokerInvocationException;
64  import org.codehaus.groovy.syntax.Token;
65  
66  /***
67   * 
68   * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
69   * @version $Revision: 1.12 $
70   */
71  public class GStringTest extends TestSupport {
72  
73      public void testConstructor() throws Exception {
74          ClassNode classNode = new ClassNode("Foo", ACC_PUBLIC, ClassHelper.OBJECT_TYPE);
75  
76          //Statement printStatement = createPrintlnStatement(new VariableExpression("str"));
77  
78          // simulate "Hello ${user}!"
79          GStringExpression compositeStringExpr = new GStringExpression( "hello ${user}!" );
80          compositeStringExpr.addString(new ConstantExpression("Hello "));
81          compositeStringExpr.addValue(new VariableExpression("user"));
82          compositeStringExpr.addString(new ConstantExpression("!"));
83          BlockStatement block = new BlockStatement();
84          block.addStatement(
85              new ExpressionStatement(
86                  new BinaryExpression(
87                      new VariableExpression("user"),
88                      Token.newSymbol("=", -1, -1),
89                      new ConstantExpression("World"))));
90          block.addStatement(
91              new ExpressionStatement(
92                  new BinaryExpression(new VariableExpression("str"), Token.newSymbol( "=", -1, -1), compositeStringExpr)));
93          block.addStatement(
94              new ExpressionStatement(
95                  new MethodCallExpression(VariableExpression.THIS_EXPRESSION, "println", new VariableExpression("str"))));
96  
97          block.addStatement(
98              new ExpressionStatement(
99                  new BinaryExpression(
100                     new VariableExpression("text"),
101                     Token.newSymbol( "=", -1, -1),
102                     new MethodCallExpression(new VariableExpression("str"), "toString", ConstantExpression.NULL))));
103 
104         block.addStatement(
105             new AssertStatement(
106                 new BooleanExpression(
107                     new BinaryExpression(
108                         new VariableExpression("text"),
109                         Token.newSymbol( "==", -1, -1),
110                         new ConstantExpression("Hello World!")))));
111         classNode.addMethod(new MethodNode("stringDemo", ACC_PUBLIC, ClassHelper.VOID_TYPE, Parameter.EMPTY_ARRAY, block));
112 
113         Class fooClass = loadClass(classNode);
114         assertTrue("Loaded a new class", fooClass != null);
115 
116         Object bean = fooClass.newInstance();
117         assertTrue("Managed to create bean", bean != null);
118 
119         System.out.println("################ Now about to invoke method");
120 
121         //Object[] array = { new Integer(1234), "abc", "def" };
122 
123         try {
124             InvokerHelper.invokeMethod(bean, "stringDemo", null);
125         }
126         catch (InvokerInvocationException e) {
127             System.out.println("Caught: " + e.getCause());
128             e.getCause().printStackTrace();
129             fail("Should not have thrown an exception");
130         }
131         System.out.println("################ Done");
132     }
133 }