"The 'next' property of the appended referral should point back to the initial referral, closing the loop.");
    }

    /**
     * Tests the toString method of the DfsReferral class.
     * It verifies that the toString method returns a string representation of the object
     * that accurately reflects its properties.
     */
    @Test
    void testToString() {
        // Given

        PrunedTag tag = tags[0];
        assertEquals("div", tag.toString().split(", ")[0].split("=")[1]);
        assertTrue(tag.toString().contains("id=main-modal"));
        assertTrue(tag.toString().contains("css=modal"));
        assertTrue(tag.toString().contains("attrName=data-toggle"));
        assertTrue(tag.toString().contains("attrValue=modal"));

        // Test multiple tags with different combinations

    assertThat(HostAndPort.fromString("foo:101").toString()).isEqualTo("foo:101");
    assertThat(HostAndPort.fromString(":102").toString()).isEqualTo(":102");
    assertThat(HostAndPort.fromParts("1::2", 103).toString()).isEqualTo("[1::2]:103");
    assertThat(HostAndPort.fromString("[::1]:104").toString()).isEqualTo("[::1]:104");

    // Without ports.
    assertThat(HostAndPort.fromString("foo").toString()).isEqualTo("foo");

    assertThat(HostAndPort.fromString("foo:101").toString()).isEqualTo("foo:101");
    assertThat(HostAndPort.fromString(":102").toString()).isEqualTo(":102");
    assertThat(HostAndPort.fromParts("1::2", 103).toString()).isEqualTo("[1::2]:103");
    assertThat(HostAndPort.fromString("[::1]:104").toString()).isEqualTo("[::1]:104");

    // Without ports.
    assertThat(HostAndPort.fromString("foo").toString()).isEqualTo("foo");

        assertNull(ex.getCause());

        // Assert - toString starts with class name and contains message when present
        if (message == null) {
            assertEquals(SMBProtocolDowngradeException.class.getName(), ex.toString());
        } else if (message.isEmpty()) {
            // Throwable.toString prints class + ": " (with space) even for empty string

    HashCode hash2 = HashCode.fromString(hash1.toString());
    assertEquals(hash1, hash2);
  }

  public void testRoundTrip() {
    for (ExpectedHashCode expected : expectedHashCodes) {
      String string = HashCode.fromBytes(expected.bytes).toString();
      assertThat(string).isEqualTo(expected.toString);
      assertThat(HashCode.fromBytes(BaseEncoding.base16().lowerCase().decode(string)).toString())
          .isEqualTo(expected.toString);

        String resultString = response.toString();
        assertTrue(resultString.contains("status=0"), "toString should contain the status.");
        assertTrue(resultString.contains("converter=13330"), "toString should contain the converter.");
        assertTrue(resultString.contains("entriesReturned=2"), "toString should contain the number of entries.");

        // The toString method appends to super.toString(). We'll check the appended part.
        String expectedEnd = ",addrEntry=]";
        String actual = nameQueryResponse.toString();
        assertTrue(actual.endsWith(expectedEnd), "toString should end with ',addrEntry=]' when addrEntry is null");
        assertTrue(actual.startsWith("NameQueryResponse["), "toString should start with expected prefix");
    }

        // When
        String s = next.toString();

        // Then
        assertTrue(s.startsWith("Trans2FindNext2["), "toString should start with class name");
        assertTrue(s.contains(",sid=" + sid), "toString should include sid in decimal");
        assertTrue(s.contains(",searchCount=" + Trans2FindFirst2.LIST_SIZE), "toString should include searchCount using LIST_SIZE");

  public void testToStringEmpty() {
    assertEquals("{}", multimap().toString());
  }

  @CollectionSize.Require(ONE)
  @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
  public void testToStringSingleton() {
    assertEquals("{" + k0() + "=[" + v0() + "]}", multimap().toString());
  }

  @CollectionSize.Require(absent = ZERO)
  @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)