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.coders;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.equalTo;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  import java.util.TreeMap;
  import org.apache.beam.sdk.testing.CoderProperties;
  import org.apache.beam.sdk.transforms.windowing.GlobalWindow;
  import org.apache.beam.sdk.util.CoderUtils;
  import org.apache.beam.sdk.values.TypeDescriptor;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableMap;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.ExpectedException;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Unit tests for {@link MapCoder}. */
  @RunWith(JUnit4.class)
  public class MapCoderTest {
  
    private static final Coder<Map<Integer, String>> TEST_CODER =
        MapCoder.of(VarIntCoder.of(), StringUtf8Coder.of());
  
    private static final List<Map<Integer, String>> TEST_VALUES =
        Arrays.asList(
            Collections.emptyMap(),
            new TreeMap<>(
                new ImmutableMap.Builder<Integer, String>().put(1, "hello").put(-1, "foo").build()));
  
    @Test
    public void testDecodeEncodeContentsInSameOrder() throws Exception {
      for (Map<Integer, String> value : TEST_VALUES) {
        CoderProperties.coderDecodeEncodeEqual(TEST_CODER, value);
      }
    }
  
    @Test
    public void testCoderIsSerializableWithWellKnownCoderType() throws Exception {
      CoderProperties.coderSerializable(
          MapCoder.of(GlobalWindow.Coder.INSTANCE, GlobalWindow.Coder.INSTANCE));
    }
  
    /**
     * Generated data to check that the wire format has not changed. To regenerate, see {@link
     * org.apache.beam.sdk.coders.PrintBase64Encodings}.
     */
    private static final List<String> TEST_ENCODINGS =
        Arrays.asList("AAAAAA", "AAAAAv____8PA2ZvbwFoZWxsbw");
  
    @Test
    public void testWireFormatEncode() throws Exception {
      CoderProperties.coderEncodesBase64(TEST_CODER, TEST_VALUES, TEST_ENCODINGS);
    }
  
    @Rule public ExpectedException thrown = ExpectedException.none();
  
    @Test
    public void encodeNullThrowsCoderException() throws Exception {
      thrown.expect(CoderException.class);
      thrown.expectMessage("cannot encode a null Map");
  
      CoderUtils.encodeToBase64(TEST_CODER, null);
    }
  
    @Test
    public void testStructuralValueDecodeEncodeEqual() throws Exception {
      MapCoder<byte[], Integer> coder = MapCoder.of(ByteArrayCoder.of(), VarIntCoder.of());
      Map<byte[], Integer> value = Collections.singletonMap(new byte[] {1, 2, 3, 4}, 1);
      CoderProperties.structuralValueDecodeEncodeEqual(coder, value);
    }
  
    @Test
    public void testNotConsistentWithEquals() {
      MapCoder<Integer, byte[]> coder = MapCoder.of(VarIntCoder.of(), ByteArrayCoder.of());
      assertFalse(coder.consistentWithEquals());
    }
  
    @Test
    public void testConsistentWithEquals() {
      MapCoder<Integer, Integer> coder = MapCoder.of(VarIntCoder.of(), VarIntCoder.of());
      assertTrue(coder.consistentWithEquals());
    }
  
    @Test
    public void testEncodedTypeDescriptor() throws Exception {
      TypeDescriptor<Map<Integer, String>> typeDescriptor =
          new TypeDescriptor<Map<Integer, String>>() {};
      assertThat(TEST_CODER.getEncodedTypeDescriptor(), equalTo(typeDescriptor));
    }
  }
  