| /* |
| * 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.runners.dataflow.worker; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| import static org.mockito.Matchers.any; |
| import static org.mockito.Mockito.when; |
| |
| import com.google.api.services.dataflow.model.SideInputInfo; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import org.apache.beam.runners.core.SideInputReader; |
| import org.apache.beam.sdk.transforms.windowing.BoundedWindow; |
| import org.apache.beam.sdk.transforms.windowing.GlobalWindow; |
| import org.apache.beam.sdk.values.PCollectionView; |
| import org.apache.beam.sdk.values.TupleTag; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.collect.ImmutableList; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| import org.mockito.Mock; |
| import org.mockito.MockitoAnnotations; |
| |
| /** Tests for {@link LazilyInitializedSideInputReader}. */ |
| @RunWith(JUnit4.class) |
| public class LazilyInitializedSideInputReaderTest { |
| private static final String TEST_TAG = "test_tag"; |
| |
| @Mock private SideInputReader mockSideInputReader; |
| @Mock private PCollectionView mockPCollectionView; |
| |
| @Before |
| public void setUp() { |
| MockitoAnnotations.initMocks(this); |
| } |
| |
| @Test |
| public void testLazyInitialization() { |
| final AtomicInteger wasCalled = new AtomicInteger(); |
| SideInputReader lazilyInitializedSideInputReader = |
| new LazilyInitializedSideInputReader( |
| ImmutableList.of(new SideInputInfo().setTag(TEST_TAG)), |
| () -> { |
| wasCalled.incrementAndGet(); |
| return mockSideInputReader; |
| }); |
| // Ensure that after construction we have not been initialized yet. |
| assertEquals(0, wasCalled.get()); |
| |
| // Ensure that after checking some basic tag information we have not been initialized yet. |
| assertFalse(lazilyInitializedSideInputReader.isEmpty()); |
| assertEquals(0, wasCalled.get()); |
| |
| when(mockPCollectionView.getTagInternal()).thenReturn(new TupleTag(TEST_TAG)); |
| assertTrue(lazilyInitializedSideInputReader.contains(mockPCollectionView)); |
| assertEquals(0, wasCalled.get()); |
| |
| // Ensure that we were constructed only once, and provided the expected parameters and returned |
| // the expected result. |
| when(mockSideInputReader.get(any(PCollectionView.class), any(BoundedWindow.class))) |
| .thenReturn(42) |
| .thenReturn(43); |
| assertEquals( |
| 42, lazilyInitializedSideInputReader.get(mockPCollectionView, GlobalWindow.INSTANCE)); |
| assertEquals(1, wasCalled.get()); |
| assertEquals( |
| 43, lazilyInitializedSideInputReader.get(mockPCollectionView, GlobalWindow.INSTANCE)); |
| assertEquals(1, wasCalled.get()); |
| } |
| } |