sdks/java/core/src/test/java/org/apache/beam/sdk/transforms/join/CoGbkResultCoderTest.java

/*
 * 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
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package org.apache.beam.sdk.transforms.join;

import static org.junit.Assert.assertFalse;

import org.apache.beam.sdk.coders.BigEndianIntegerCoder;
import org.apache.beam.sdk.coders.DoubleCoder;
import org.apache.beam.sdk.coders.StringUtf8Coder;
import org.apache.beam.sdk.coders.VarIntCoder;
import org.apache.beam.sdk.testing.CoderProperties;
import org.apache.beam.sdk.transforms.join.CoGbkResult.CoGbkResultCoder;
import org.apache.beam.sdk.transforms.windowing.GlobalWindow;
import org.apache.beam.sdk.values.TupleTag;
import org.apache.beam.sdk.values.TupleTagList;
import org.apache.beam.vendor.guava.v20_0.com.google.common.collect.ImmutableList;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Tests the CoGbkResult.CoGbkResultCoder. */
@RunWith(JUnit4.class)
public class CoGbkResultCoderTest {

  private static final CoGbkResultSchema TEST_SCHEMA =
      new CoGbkResultSchema(TupleTagList.of(new TupleTag<String>()).and(new TupleTag<Integer>()));

  private static final UnionCoder TEST_UNION_CODER =
      UnionCoder.of(ImmutableList.of(StringUtf8Coder.of(), VarIntCoder.of()));

  private static final UnionCoder COMPATIBLE_UNION_CODER =
      UnionCoder.of(ImmutableList.of(StringUtf8Coder.of(), BigEndianIntegerCoder.of()));

  private static final CoGbkResultSchema INCOMPATIBLE_SCHEMA =
      new CoGbkResultSchema(TupleTagList.of(new TupleTag<String>()).and(new TupleTag<Double>()));

  private static final UnionCoder INCOMPATIBLE_UNION_CODER =
      UnionCoder.of(ImmutableList.of(StringUtf8Coder.of(), DoubleCoder.of()));

  private static final CoGbkResultCoder TEST_CODER =
      CoGbkResultCoder.of(TEST_SCHEMA, TEST_UNION_CODER);

  private static final CoGbkResultCoder COMPATIBLE_TEST_CODER =
      CoGbkResultCoder.of(TEST_SCHEMA, COMPATIBLE_UNION_CODER);

  private static final CoGbkResultCoder INCOMPATIBLE_TEST_CODER =
      CoGbkResultCoder.of(INCOMPATIBLE_SCHEMA, INCOMPATIBLE_UNION_CODER);

  @Test
  public void testEquals() {
    assertFalse(TEST_CODER.equals(new Object()));
    assertFalse(TEST_CODER.equals(COMPATIBLE_TEST_CODER));
    assertFalse(TEST_CODER.equals(INCOMPATIBLE_TEST_CODER));
  }

  @Test
  public void testCoderIsSerialiable() {
    CoderProperties.coderSerializable(TEST_CODER);
  }

  @Test
  public void testCoderIsSerializableWithWellKnownCoderType() {
    CoderProperties.coderSerializable(
        CoGbkResultCoder.of(
            CoGbkResultSchema.of(ImmutableList.of(new TupleTag<GlobalWindow>())),
            UnionCoder.of(ImmutableList.of(GlobalWindow.Coder.INSTANCE))));
  }
}