/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.ambari.server.utils;

public class Assertions {

  public static <T extends Exception> T assertThrows(Class<T> expectedException, Runnable code) {
    try {
      code.run();
    } catch (Exception e) {
      if (expectedException.isInstance(e)) {
        return expectedException.cast(e);
      }
      throw new AssertionError("Expected exception: " + expectedException + " but " + e.getClass() + " was thrown instead", e);
    }

    throw new AssertionError("Expected exception: " + expectedException + ", but was not thrown");
  }

}
