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.kafka.common.protocol;
  
  import org.apache.kafka.common.protocol.types.RawTaggedField;
  
  import com.fasterxml.jackson.databind.JsonNode;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.databind.node.BinaryNode;
  import com.fasterxml.jackson.databind.node.IntNode;
  import com.fasterxml.jackson.databind.node.TextNode;
  
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.Timeout;
  
  import java.io.IOException;
  import java.io.StringWriter;
  import java.io.UncheckedIOException;
  import java.nio.ByteBuffer;
  import java.util.Arrays;
  import java.util.Collections;
  
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  @Timeout(120)
  public final class MessageUtilTest {
  
      @Test
      public void testDeepToString() {
          assertEquals("[1, 2, 3]",
              MessageUtil.deepToString(Arrays.asList(1, 2, 3).iterator()));
          assertEquals("[foo]",
              MessageUtil.deepToString(Collections.singletonList("foo").iterator()));
      }
  
      @Test
      public void testByteBufferToArray() {
          assertArrayEquals(new byte[]{1, 2, 3},
              MessageUtil.byteBufferToArray(ByteBuffer.wrap(new byte[]{1, 2, 3})));
          assertArrayEquals(new byte[]{},
              MessageUtil.byteBufferToArray(ByteBuffer.wrap(new byte[]{})));
      }
  
      @Test
      public void testDuplicate() {
          assertNull(MessageUtil.duplicate(null));
          assertArrayEquals(new byte[] {},
              MessageUtil.duplicate(new byte[] {}));
          assertArrayEquals(new byte[] {1, 2, 3},
              MessageUtil.duplicate(new byte[] {1, 2, 3}));
      }
  
      @Test
      public void testCompareRawTaggedFields() {
          assertTrue(MessageUtil.compareRawTaggedFields(null, null));
          assertTrue(MessageUtil.compareRawTaggedFields(null, Collections.emptyList()));
          assertTrue(MessageUtil.compareRawTaggedFields(Collections.emptyList(), null));
          assertFalse(MessageUtil.compareRawTaggedFields(Collections.emptyList(),
              Collections.singletonList(new RawTaggedField(1, new byte[] {1}))));
          assertFalse(MessageUtil.compareRawTaggedFields(null,
              Collections.singletonList(new RawTaggedField(1, new byte[] {1}))));
          assertFalse(MessageUtil.compareRawTaggedFields(
              Collections.singletonList(new RawTaggedField(1, new byte[] {1})),
              Collections.emptyList()));
          assertTrue(MessageUtil.compareRawTaggedFields(
              Arrays.asList(new RawTaggedField(1, new byte[] {1}),
                  new RawTaggedField(2, new byte[] {})),
              Arrays.asList(new RawTaggedField(1, new byte[] {1}),
                  new RawTaggedField(2, new byte[] {}))));
      }
  
      @Test
      public void testConstants() {
          assertEquals(MessageUtil.UNSIGNED_SHORT_MAX, 0xFFFF);
          assertEquals(MessageUtil.UNSIGNED_INT_MAX, 0xFFFFFFFFL);
      }
  
      @Test
      public void testBinaryNode() throws IOException {
          byte[] expected = new byte[] {5, 2, 9, 4, 1, 8, 7, 0, 3, 6};
          StringWriter writer = new StringWriter();
          ObjectMapper mapper = new ObjectMapper();
  
          mapper.writeTree(mapper.createGenerator(writer), new BinaryNode(expected));
  
          JsonNode textNode = mapper.readTree(writer.toString());
  
          assertTrue(textNode.isTextual(), String.format("Expected a JSON string but was: %s", textNode));
          byte[] actual = MessageUtil.jsonNodeToBinary(textNode, "Test base64 JSON string");
          assertArrayEquals(expected, actual);
      }
  
      @Test
      public void testInvalidBinaryNode() {
          assertThrows(
              IllegalArgumentException.class,
              () -> MessageUtil.jsonNodeToBinary(new IntNode(42), "Test int to binary")
          );
          assertThrows(
              UncheckedIOException.class,
              () -> MessageUtil.jsonNodeToBinary(new TextNode("This is not base64!"), "Test non-base64 to binary")
          );
      }
  }
  