code: /*
   * Copyright (c) 2022 Airbyte, Inc., all rights reserved.
   */
  
  package io.airbyte.integrations.destination.s3;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.util.HashMap;
  import java.util.Map;
  import org.junit.jupiter.api.Test;
  
  public class BlobDecoratorTest {
  
    @Test
    public void testOverwriteMetadata() {
      final Map<String, String> metadata = new HashMap<>();
      metadata.put("amz-foo", "oldValue");
  
      BlobDecorator.insertMetadata(
          metadata,
          Map.of("foo", "amz-foo"),
          "foo", "newValue");
  
      assertEquals(Map.of("amz-foo", "newValue"), metadata);
    }
  
    @Test
    public void testNewMetadata() {
      final Map<String, String> metadata = new HashMap<>();
      metadata.put("amz-foo", "oldValue");
  
      BlobDecorator.insertMetadata(
          metadata,
          Map.of("bar", "amz-bar"),
          "bar", "newValue");
  
      assertEquals(
          Map.of(
              "amz-foo", "oldValue",
              "amz-bar", "newValue"),
          metadata);
    }
  
    @Test
    public void testSkipMetadata() {
      final Map<String, String> metadata = new HashMap<>();
      metadata.put("amz-foo", "oldValue");
  
      BlobDecorator.insertMetadata(
          metadata,
          Map.of("foo", "amz-foo"),
          "bar", "newValue");
  
      assertEquals(Map.of("amz-foo", "oldValue"), metadata);
    }
  
  }
  