return this.presentFeatures.equals(that.presentFeatures)
          && this.absentFeatures.equals(that.absentFeatures);
    }
    return false;
  }

  @Override
  public int hashCode() {
    return presentFeatures.hashCode() * 31 + absentFeatures.hashCode();
  }

  @Override
  public String toString() {
    return "{TesterRequirements: present=" + presentFeatures + ", absent=" + absentFeatures + "}";
  }

              @Override
              public Set<Entry<String, String>> entrySet() {
                return new EntrySet();
              }

              @Override
              public int hashCode() {
                return map.hashCode();
              }

              @Override
              public boolean equals(@Nullable Object o) {
                return map.equals(o);
              }

              @Override

     */
    @Override
    boolean equals(@CheckForNull Object other);

    /**
     * The hash code equals the value {@code Arrays.asList(leftValue(), rightValue()).hashCode()}.
     */
    @Override
    int hashCode();
  }

      Headers.Builder()
        .add("Connection", "close")
        .add("Transfer-Encoding", "chunked")
        .build()
    assertThat(headers2).isEqualTo(headers1)
    assertThat(headers2.hashCode()).isEqualTo(headers1.hashCode())
  }

  @Test fun headersNotEquals() {
    val headers1 =
      Headers.Builder()
        .add("Connection", "close")
        .add("Transfer-Encoding", "chunked")
        .build()

          !item.equals(NotAnInstance.EQUAL_TO_NOTHING));
      assertTrue(item + " must be Object#equals to itself", item.equals(item));
      assertEquals(
          "the Object#hashCode of " + item + " must be consistent",
          item.hashCode(),
          item.hashCode());
      if (!(item instanceof String)) {
        assertTrue(
            item + " must not be Object#equals to its Object#toString representation",

  return other is Challenge &&
    other.scheme == scheme &&
    other.authParams == authParams
}

fun Challenge.commonHashCode(): Int {
  var result = 29
  result = 31 * result + scheme.hashCode()
  result = 31 * result + authParams.hashCode()
  return result
}

 * but can be extended by registering a {@code org.apache.maven.api.spi.ProjectScopeProvider}.
 * <p>
 * Implementation must have {@code equals()} and {@code hashCode()} implemented, so implementations of this interface
 * can be used as keys.
 *
 * @since 4.0.0
 */
@Experimental
@Immutable
@SuppressWarnings("checkstyle:InterfaceIsType")

/**
 * Tests {@code DependencyManagement}.
 *
 */
class DependencyManagementTest {

    @Test
    void testHashCodeNullSafe() {
        new DependencyManagement().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new DependencyManagement().equals(null));

        new DependencyManagement().equals(new DependencyManagement());
    }

    @Test

import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * Tests {@code Dependency}.
 *
 */
class DependencyTest {

    @Test
    void testHashCodeNullSafe() {
        new Dependency().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Dependency().equals(null));

        new Dependency().equals(new Dependency());
    }

    @Test

/**
 * Tests {@code DistributionManagement}.
 *
 */
class DistributionManagementTest {

    @Test
    void testHashCodeNullSafe() {
        new DistributionManagement().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new DistributionManagement().equals(null));

        new DistributionManagement().equals(new DistributionManagement());
    }