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1
3 package org.jmock.core.stub;
4
5 import junit.framework.Assert;
6 import org.jmock.core.Invocation;
7 import org.jmock.core.Stub;
8
9
10 public class ThrowStub
11 extends Assert
12 implements Stub
13 {
14 private Throwable  throwable;
15
16 public ThrowStub( Throwable throwable ) {
17 this.throwable = throwable;
18 }
19
20 public Object invoke( Invocation invocation ) throws Throwable {
21 if (isThrowingCheckedException()) {
22 checkTypeCompatiblity(invocation.invokedMethod.getExceptionTypes());
23 }
24
25 throwable.fillInStackTrace();
26 throw throwable;
27 }
28
29 public StringBuffer describeTo( StringBuffer buffer ) {
30 return buffer.append("throws <").append(throwable).append(">");
31 }
32
33 private void checkTypeCompatiblity( Class [] allowedExceptionTypes ) {
34 for (int i = 0; i < allowedExceptionTypes.length; i++) {
35 if (allowedExceptionTypes[i].isInstance(throwable)) return;
36 }
37
38 reportIncompatibleCheckedException(allowedExceptionTypes);
39 }
40
41 private void reportIncompatibleCheckedException( Class [] allowedTypes ) {
42 StringBuffer message = new StringBuffer ();
43
44 message.append("tried to throw a ");
45 message.append(throwable.getClass().getName());
46 message.append(" from a method that throws ");
47
48 if (allowedTypes.length == 0) {
49 message.append("no exceptions");
50 } else {
51 for (int i = 0; i < allowedTypes.length; i++) {
52 if (i > 0) message.append(",");
53 message.append(allowedTypes[i].getName());
54 }
55 }
56
57 fail(message.toString());
58 }
59
60 private boolean isThrowingCheckedException() {
61 return !(throwable instanceof RuntimeException || throwable instanceof Error );
62 }
63 }
64 |
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