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
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   */
  package org.apache.beam.runners.flink.translation.types;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.core.Is.is;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.Serializable;
  import org.apache.beam.runners.core.construction.SerializablePipelineOptions;
  import org.apache.beam.sdk.coders.AtomicCoder;
  import org.apache.beam.sdk.coders.Coder;
  import org.apache.beam.sdk.coders.StringUtf8Coder;
  import org.apache.beam.sdk.options.PipelineOptionsFactory;
  import org.apache.flink.api.common.typeutils.ComparatorTestBase;
  import org.apache.flink.api.common.typeutils.TypeSerializerSnapshot;
  import org.junit.Test;
  
  /** Tests {@link CoderTypeSerializer}. */
  @SuppressWarnings({
    "rawtypes", // TODO(https://github.com/apache/beam/issues/20447)
  })
  public class CoderTypeSerializerTest implements Serializable {
  
    @Test
    public void shouldWriteAndReadSnapshotForAnonymousClassCoder() throws Exception {
      AtomicCoder<String> anonymousClassCoder =
          new AtomicCoder<String>() {
  
            @Override
            public void encode(String value, OutputStream outStream) {}
  
            @Override
            public String decode(InputStream inStream) {
              return "";
            }
          };
  
      testWriteAndReadConfigSnapshot(anonymousClassCoder);
    }
  
    @Test
    public void shouldWriteAndReadSnapshotForConcreteClassCoder() throws Exception {
      Coder<String> concreteClassCoder = StringUtf8Coder.of();
      testWriteAndReadConfigSnapshot(concreteClassCoder);
    }
  
    private void testWriteAndReadConfigSnapshot(Coder<String> coder) throws IOException {
      CoderTypeSerializer<String> serializer =
          new CoderTypeSerializer<>(
              coder, new SerializablePipelineOptions(PipelineOptionsFactory.create()));
  
      TypeSerializerSnapshot writtenSnapshot = serializer.snapshotConfiguration();
      ComparatorTestBase.TestOutputView outView = new ComparatorTestBase.TestOutputView();
      writtenSnapshot.writeSnapshot(outView);
  
      TypeSerializerSnapshot readSnapshot = new UnversionedTypeSerializerSnapshot();
      readSnapshot.readSnapshot(
          writtenSnapshot.getCurrentVersion(), outView.getInputView(), getClass().getClassLoader());
  
      assertThat(readSnapshot.restoreSerializer(), is(serializer));
    }
  }
  