/*
* Copyright 2008, Unitils.org
*
* 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.unitils.mock.mockbehavior.impl;
import org.unitils.core.UnitilsException;
import org.unitils.mock.Mock;
import org.unitils.mock.core.proxy.ProxyInvocation;
import static org.unitils.mock.core.proxy.StackTraceUtils.getInvocationStackTrace;
import org.unitils.mock.mockbehavior.ValidatableMockBehavior;
import java.util.Arrays;
/**
* Mock behavior that throws a given exception.
*
* @author Filip Neven
* @author Tim Ducheyne
* @author Kenny Claes
*/
public class ExceptionThrowingMockBehavior implements ValidatableMockBehavior {
/* The exception to throw */
private Throwable exceptionToThrow;
/**
* Creates the throwing behavior for the given exception.
*
* @param exceptionToThrow The exception, not null
*/
public ExceptionThrowingMockBehavior(Throwable exceptionToThrow) {
this.exceptionToThrow = exceptionToThrow;
}
/**
* Checks whether the mock behavior can be executed for the given invocation.
* An exception is raised if the method is a void method or has a non-assignable return type.
*
* @param proxyInvocation The proxy method invocation, not null
*/
public void assertCanExecute(ProxyInvocation proxyInvocation) throws UnitilsException {
if (exceptionToThrow instanceof RuntimeException || exceptionToThrow instanceof Error) {
return;
}
Class<?>[] exceptionTypes = proxyInvocation.getMethod().getExceptionTypes();
for (Class<?> exceptionType : exceptionTypes) {
if (exceptionType.isAssignableFrom(exceptionToThrow.getClass())) {
return;
}
}
throw new UnitilsException("Trying to make a method throw an exception that it doesn't declare. Exception type: " + exceptionToThrow.getClass() +
(exceptionTypes.length > 0 ? ", declared exceptions: " + Arrays.toString(exceptionTypes) : ", no declared exceptions"));
}
/**
* Executes the mock behavior.
*
* @param proxyInvocation The proxy method invocation, not null
* @return Nothing
*/
public Object execute(ProxyInvocation proxyInvocation) throws Throwable {
exceptionToThrow.setStackTrace(getInvocationStackTrace(Mock.class, false));
throw exceptionToThrow;
}
}