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.testing;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  
  import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
  import org.apache.beam.sdk.transforms.windowing.GlobalWindow;
  import org.apache.beam.sdk.transforms.windowing.IncompatibleWindowException;
  import org.apache.beam.sdk.transforms.windowing.IntervalWindow;
  import org.apache.beam.sdk.transforms.windowing.WindowFn;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableList;
  import org.hamcrest.Matchers;
  import org.joda.time.Instant;
  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 StaticWindows}. */
  @RunWith(JUnit4.class)
  public class StaticWindowsTest {
    @Rule public ExpectedException thrown = ExpectedException.none();
  
    private final IntervalWindow first = new IntervalWindow(new Instant(0), new Instant(100_000L));
    private final IntervalWindow second =
        new IntervalWindow(new Instant(1_000_000L), GlobalWindow.INSTANCE.maxTimestamp());
  
    @Test
    public void singleWindowSucceeds() throws Exception {
      WindowFn<Object, BoundedWindow> fn = StaticWindows.of(IntervalWindow.getCoder(), first);
      assertThat(WindowFnTestUtils.assignedWindows(fn, 100L), Matchers.contains(first));
      assertThat(WindowFnTestUtils.assignedWindows(fn, -100L), Matchers.contains(first));
    }
  
    @Test
    public void multipleWindowsSucceeds() throws Exception {
      WindowFn<Object, BoundedWindow> fn =
          StaticWindows.of(IntervalWindow.getCoder(), ImmutableList.of(first, second));
      assertThat(
          WindowFnTestUtils.assignedWindows(fn, 100L), Matchers.containsInAnyOrder(first, second));
      assertThat(
          WindowFnTestUtils.assignedWindows(fn, 1_000_000_000L),
          Matchers.containsInAnyOrder(first, second));
      assertThat(
          WindowFnTestUtils.assignedWindows(fn, -100L), Matchers.containsInAnyOrder(first, second));
    }
  
    @Test
    public void getSideInputWindowIdentity() {
      WindowFn<Object, BoundedWindow> fn =
          StaticWindows.of(IntervalWindow.getCoder(), ImmutableList.of(first, second));
  
      assertThat(fn.getDefaultWindowMappingFn().getSideInputWindow(first), Matchers.equalTo(first));
      assertThat(fn.getDefaultWindowMappingFn().getSideInputWindow(second), Matchers.equalTo(second));
    }
  
    @Test
    public void getSideInputWindowNotPresent() {
      WindowFn<Object, BoundedWindow> fn =
          StaticWindows.of(IntervalWindow.getCoder(), ImmutableList.of(second));
      thrown.expect(IllegalArgumentException.class);
      thrown.expectMessage("contains");
      fn.getDefaultWindowMappingFn().getSideInputWindow(first);
    }
  
    @Test
    public void emptyIterableThrows() {
      thrown.expect(IllegalArgumentException.class);
      thrown.expectMessage("may not be empty");
      StaticWindows.of(GlobalWindow.Coder.INSTANCE, ImmutableList.of());
    }
  
    @Test
    public void testCompatibility() throws IncompatibleWindowException {
      StaticWindows staticWindows =
          StaticWindows.of(IntervalWindow.getCoder(), ImmutableList.of(first, second));
      staticWindows.verifyCompatibility(
          StaticWindows.of(IntervalWindow.getCoder(), ImmutableList.of(first, second)));
      thrown.expect(IncompatibleWindowException.class);
      staticWindows.verifyCompatibility(
          StaticWindows.of(IntervalWindow.getCoder(), ImmutableList.of(first)));
    }
  }
  