assertTrue(restriction.isLowerBoundInclusive(), CHECK_LOWER_BOUND_INCLUSIVE);
        assertEquals("1.4", restriction.getUpperBound().toString(), CHECK_UPPER_BOUND);
        assertTrue(restriction.isUpperBoundInclusive(), CHECK_UPPER_BOUND_INCLUSIVE);
        restriction = restrictions.get(2);
        assertEquals("1.5", restriction.getLowerBound().toString(), CHECK_LOWER_BOUND);

    }

    @Nested
    @DisplayName("toString() Tests")
    class ToStringTests {

        @Test
        @DisplayName("toString with valid data produces expected format")
        void testToStringWithValidData() {
            byte[] challenge = new byte[] { (byte) 0x01, (byte) 0x02, (byte) 0x03, (byte) 0xFF };
            UniAddress dc = mock(UniAddress.class);
            when(dc.toString()).thenReturn("SERVER123");

        System.setProperty("fess.var.path", varDir.toString());
        assertThrows(IllegalArgumentException.class, () -> action.validateFilePath(varDir.toString() + "/../../../etc/passwd"));
    }

    @Test
    public void test_validateFilePath_pathTraversal_middleDotdot() {
        final FessAdminAction action = createAction();
        System.setProperty("fess.var.path", varDir.toString());

                    doc.toString());
            assertFalse(
                    doc.entrySet()
                            .stream()
                            .anyMatch(entry -> entry.getValue().toString().toLowerCase().contains(keywords[2].toLowerCase())),
                    doc.toString());
        }
    }

    @Test

  public void testToString_minimal() {
    assertNotNull("toString() should not return null", getMap().toString());
  }

  @CollectionSize.Require(ZERO)
  @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
  public void testToString_size0() {
    assertEquals("emptyMap.toString should return {}", "{}", getMap().toString());
  }

  @CollectionSize.Require(ONE)

        // Test toString with empty string and zterm = true
        UnicodeString emptyUnicodeStringTrue = new UnicodeString("", true);
        assertEquals("", emptyUnicodeStringTrue.toString(), "toString should return empty string for empty input with zterm");

        // Test toString with empty string and zterm = false

              @Override
              public String toString() {
                return runnable.toString();
              }
            });
  }

  public void testFailsToForwardToString() {
    assertFailure(
        Runnable.class,
        runnable ->
            new ForwardingRunnable(runnable) {
              @Override
              public String toString() {
                return "";
              }

        DfsReferral dfsReferral = new DfsReferral(mockData);

        // Verify that toString() returns the expected string from the mock data object
        assertEquals(expectedToString, dfsReferral.toString(),
                "toString() should return the result of the wrapped DfsReferralData's toString() method.");
    }

        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

    assertThat(helper.toString()).isEqualTo(expected);
    // Call toString again
    assertThat(helper.toString()).isEqualTo(expected);

    // Make sure the cached value is reset when we modify the helper at all
    String expected2 = "TestClass{field1=1, value1, field2=value2, 2}";
    helper.addValue(2);
    assertThat(helper.toString()).isEqualTo(expected2);
  }