/*
* Copyright 2007 the original author or authors.
*
* 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 jdave;
/**
* @author Lasse Koskela
*/
public class ExpectedException<T> {
protected final Class<? extends T> expected;
public ExpectedException(Class<? extends T> expected) {
this.expected = expected;
}
public boolean matches(Throwable t) {
return matchesType(t.getClass());
}
public String error(Throwable t) {
if (!matchesType(t.getClass())) {
return "The specified block should throw "
+ expected.getName() + " but " + t.getClass().getName()
+ " was thrown.";
}
throw new IllegalStateException();
}
protected boolean matchesType(Class<? extends Throwable> actual) {
return expected.isAssignableFrom(actual);
}
public String notThrown() {
return "The specified block should throw " + expected.getName() + " but nothing was thrown.";
}
}