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EasyMock provides an easy way to create Mock Objects for interfaces and classes generating them on the fly
/*
* Copyright 2003,2004 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.easymock.cglib.reflect;
import java.lang.reflect.Method;
import junit.framework.*;
/**
* @version $Id: TestDelegates.java,v 1.4 2004/06/24 21:15:16 herbyderby Exp $
*/
public class TestDelegates extends org.easymock.cglib.CodeGenTestCase {
public interface StringMaker {
Object newInstance(char[] buf, int offset, int count);
}
public void testConstructor() throws Throwable {
StringMaker maker = (StringMaker)ConstructorDelegate.create(String.class, StringMaker.class);
assertTrue("nil".equals(maker.newInstance("vanilla".toCharArray(), 2, 3)));
}
public interface Substring {
String substring(int start, int end);
}
public interface Substring2 {
Object anyNameAllowed(int start, int end);
}
public interface IndexOf {
int indexOf(String str, int fromIndex);
}
public void testFancy() throws Throwable {
Substring delegate = (Substring)MethodDelegate.create("CGLIB", "substring", Substring.class);
assertTrue("LI".equals(delegate.substring(2, 4)));
}
public void testFancyNames() throws Throwable {
Substring2 delegate = (Substring2)MethodDelegate.create("CGLIB", "substring", Substring2.class);
assertTrue("LI".equals(delegate.anyNameAllowed(2, 4)));
}
public void testFancyTypes() throws Throwable {
String test = "abcabcabc";
IndexOf delegate = (IndexOf)MethodDelegate.create(test, "indexOf", IndexOf.class);
assertTrue(delegate.indexOf("ab", 1) == test.indexOf("ab", 1));
}
public void testEquals() throws Throwable {
String test = "abc";
MethodDelegate mc1 = MethodDelegate.create(test, "indexOf", IndexOf.class);
MethodDelegate mc2 = MethodDelegate.create(test, "indexOf", IndexOf.class);
MethodDelegate mc3 = MethodDelegate.create("other", "indexOf", IndexOf.class);
MethodDelegate mc4 = MethodDelegate.create(test, "substring", Substring.class);
MethodDelegate mc5 = MethodDelegate.create(test, "substring", Substring2.class);
assertTrue(mc1.equals(mc2));
assertTrue(!mc1.equals(mc3));
assertTrue(!mc1.equals(mc4));
assertTrue(mc4.equals(mc5));
}
public static interface MainDelegate {
int main(String[] args);
}
public static class MainTest {
public static int alternateMain(String[] args) {
return 7;
}
}
public void testStaticDelegate() throws Throwable {
MainDelegate start = (MainDelegate)MethodDelegate.createStatic(MainTest.class,
"alternateMain",
MainDelegate.class);
assertTrue(start.main(null) == 7);
}
public static interface Listener {
public void onEvent();
}
public static class Publisher {
public int test = 0;
private MulticastDelegate event = MulticastDelegate.create(Listener.class);
public void addListener(Listener listener) {
event = event.add(listener);
}
public void removeListener(Listener listener) {
event = event.remove(listener);
}
public void fireEvent() {
((Listener)event).onEvent();
}
}
public void testPublisher() throws Throwable {
final Publisher p = new Publisher();
Listener l1 = new Listener() {
public void onEvent() {
p.test++;
}
};
p.addListener(l1);
p.addListener(l1);
p.fireEvent();
assertTrue(p.test == 2);
p.removeListener(l1);
p.fireEvent();
assertTrue(p.test == 3);
}
public static interface SuperSimple {
public int execute();
}
public void testMulticastReturnValue() throws Throwable {
SuperSimple ss1 = new SuperSimple() {
public int execute() {
return 1;
}
};
SuperSimple ss2 = new SuperSimple() {
public int execute() {
return 2;
}
};
MulticastDelegate multi = MulticastDelegate.create(SuperSimple.class);
multi = multi.add(ss1);
multi = multi.add(ss2);
assertTrue(((SuperSimple)multi).execute() == 2);
multi = multi.remove(ss1);
multi = multi.add(ss1);
assertTrue(((SuperSimple)multi).execute() == 1);
}
public TestDelegates(String testName) {
super(testName);
}
public static void main(String[] args) {
junit.textui.TestRunner.run(suite());
}
public static Test suite() {
return new TestSuite(TestDelegates.class);
}
public void perform(ClassLoader loader) throws Throwable {
}
public void testFailOnMemoryLeak() throws Throwable {
}
}