/*
 * 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.beam.sdk.transforms;

import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Tests for {@link SimpleFunction}.
 */
@RunWith(JUnit4.class)
public class SimpleFunctionTest {

  @Rule
  public ExpectedException thrown = ExpectedException.none();

  @Test
  public void testFailureIfNotOverridden() {
    thrown.expect(IllegalStateException.class);
    thrown.expectMessage("must override");
    thrown.expectMessage("apply");

    SimpleFunction<Integer, Integer> broken = new SimpleFunction<Integer, Integer>() {};
  }
}