ExpectedException.java

/*
 * Created on Sep 7, 2010
 *
 * 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.
 *
 * Copyright @2010-2011 the original author or authors.
 */
package org.fest.assertions.test;

import org.junit.rules.MethodRule;
import org.junit.runners.model.*;

/**
 * Allows in-test specification of expected exception types and messages.
 *
 * @author Alex Ruiz
 */
public class ExpectedException implements MethodRule {

  private final org.junit.rules.ExpectedException delegate = org.junit.rules.ExpectedException.none();

  public static ExpectedException none() {
    return new ExpectedException();
  }

  private ExpectedException() {}

  /** {@inheritDoc} */
  public Statement apply(Statement base, FrameworkMethod method, Object target) {
    return delegate.apply(base, method, target);
  }

  public void expectAssertionError(String message) {
    expect(AssertionError.class, message);
  }

  public void expectNullPointerException(String message) {
    expect(NullPointerException.class, message);
  }

  public void expectIllegalArgumentException(String message) {
    expect(IllegalArgumentException.class, message);
  }

  public void expectIndexOutOfBoundsException(String message) {
    expect(IndexOutOfBoundsException.class, message);
  }

  private void expect(Class<? extends Throwable> type, String message) {
    expect(type);
    expectMessage(message);
  }

  public void expect(Throwable error) {
    expect(error.getClass());
    expectMessage(error.getMessage());
  }

  public void expect(Class<? extends Throwable> type) {
    delegate.expect(type);
  }

  public void expectMessage(String message) {
    delegate.expectMessage(message);
  }
}