content: /*
   * 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.state;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.equalTo;
  
  import org.apache.beam.sdk.Pipeline;
  import org.apache.beam.sdk.transforms.Create;
  import org.apache.beam.sdk.transforms.Sum;
  import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
  import org.apache.beam.sdk.transforms.windowing.IntervalWindow;
  import org.apache.beam.sdk.values.PCollectionView;
  import org.joda.time.Duration;
  import org.joda.time.Instant;
  import org.junit.Before;
  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 StateContexts}. */
  @RunWith(JUnit4.class)
  public class StateContextsTest {
    @Rule public ExpectedException thrown = ExpectedException.none();
  
    private PCollectionView<Integer> view;
  
    @Before
    public void setup() {
      Pipeline p = Pipeline.create();
      view = p.apply(Create.of(1)).apply(Sum.integersGlobally().asSingletonView());
    }
  
    @Test
    public void nullContextThrowsOnWindow() {
      StateContext<BoundedWindow> context = StateContexts.nullContext();
      thrown.expect(IllegalArgumentException.class);
      context.window();
    }
  
    @Test
    public void nullContextThrowsOnSideInput() {
      StateContext<BoundedWindow> context = StateContexts.nullContext();
      thrown.expect(IllegalArgumentException.class);
      context.sideInput(view);
    }
  
    @Test
    public void nullContextThrowsOnOptions() {
      StateContext<BoundedWindow> context = StateContexts.nullContext();
      thrown.expect(IllegalArgumentException.class);
      context.getPipelineOptions();
    }
  
    @Test
    public void windowOnlyContextThrowsOnOptions() {
      BoundedWindow window = new IntervalWindow(new Instant(-137), Duration.millis(21L));
      StateContext<BoundedWindow> context = StateContexts.windowOnlyContext(window);
      thrown.expect(IllegalArgumentException.class);
      context.getPipelineOptions();
    }
  
    @Test
    public void windowOnlyContextThrowsOnSideInput() {
      BoundedWindow window = new IntervalWindow(new Instant(-137), Duration.millis(21L));
      StateContext<BoundedWindow> context = StateContexts.windowOnlyContext(window);
      thrown.expect(IllegalArgumentException.class);
      context.sideInput(view);
    }
  
    @Test
    public void windowOnlyContextWindowReturnsWindow() {
      BoundedWindow window = new IntervalWindow(new Instant(-137), Duration.millis(21L));
      StateContext<BoundedWindow> context = StateContexts.windowOnlyContext(window);
      assertThat(context.window(), equalTo(window));
    }
  }
  