/**
 * Copyright (C) 2011 rwoo@gmx.de
 *
 * 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 com.googlecode.catchexception.throwable.apis;

import com.googlecode.catchexception.throwable.CatchThrowable;
import com.googlecode.catchexception.throwable.ThrowableNotThrownAssertionError;

class CatchThrowableUtils {

  @SuppressWarnings({"unchecked", "rawtypes"})
  public static void thenThrown(Class actualThrowableClazz) {
    Throwable e = CatchThrowable.caughtThrowable();
    if (e == null) {
      // no throwable caught -> assertion failed
      throw new ThrowableNotThrownAssertionError(actualThrowableClazz);
    } else if (!actualThrowableClazz.isAssignableFrom(CatchThrowable.caughtThrowable().getClass())) {
      // caught throwable is of wrong type -> assertion failed
      throw new ThrowableNotThrownAssertionError(actualThrowableClazz, e);
    } else {
      // the caught throwable is of the expected type -> nothing to do :-)
    }
  }

}
