assertEquals('9', Hexdump.HEX_DIGITS[9]);
        assertEquals('A', Hexdump.HEX_DIGITS[10]);
        assertEquals('F', Hexdump.HEX_DIGITS[15]);
    }

    @Test
    @DisplayName("Should handle edge cases in toHexChars")
    void testToHexCharsEdgeCases() {
        // Test with zero
        char[] dst1 = new char[4];
        java.util.Arrays.fill(dst1, 'X');
        Hexdump.toHexChars(0, dst1, 0, 4);

        void testGetReferrals() {
            assertNotNull(buffer.getReferrals());
            assertEquals(3, buffer.getReferrals().length);
        }
    }

    @Nested
    @DisplayName("Edge Cases and Boundary Tests")
    class EdgeCaseTests {

        @Test
        @DisplayName("Should handle maximum values")
        void testMaximumValues() {
            byte[] testBuffer = new byte[8];

            assertNotNull(result);
            assertTrue(result.contains("SmbInfoAllocation")); // Note: toString() uses this name
        }
    }

    @Nested
    @DisplayName("Edge Cases and Error Handling")
    class EdgeCasesTests {

        @Test
        @DisplayName("Should handle null buffer in decode")
        void testNullBuffer() {

            assertNotNull(result.getServer());
            // Empty components between double backslashes are handled
        }
    }

    @Nested
    @DisplayName("Edge Cases and Boundary Tests")
    class EdgeCasesTests {

        @ParameterizedTest
        @NullAndEmptySource
        @DisplayName("Should handle null and empty domains")

        String[] sitemaps = robotsTxt.getSitemaps();
        assertTrue(sitemaps.length >= 3); // At least the valid ones should be parsed

        // Test NumericBot - various crawl-delay formats
        // Should handle edge cases gracefully
        assertTrue(robotsTxt.getCrawlDelay("NumericBot") >= 0);

        // Test TabBot - tab characters should be treated as whitespace
        assertFalse(robotsTxt.allows("/tab1/", "TabBot"));

import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Tests for {@link Graphs}. Tests assume that the implementation of the method {@code addEdge} adds
 * the missing nodes to the graph, then adds the edge between them.
 */
@RunWith(JUnit4.class)
@NullUnmarked
public class GraphsTest {
  private static final Integer N1 = 1;
  private static final Integer N2 = 2;
  private static final Integer N3 = 3;

            // Then: Should return binding's string representation
            assertEquals("mockBindingString", result);
        }
    }

    @Nested
    @DisplayName("Edge Cases and Error Handling")
    class EdgeCaseTests {

        @Test
        @DisplayName("Should handle null binding toString")
        void testToStringWithNullBinding() {

                assertNotNull(context);
                assertTrue(context.getContextType() > 0);
            }
        }
    }

    @Nested
    @DisplayName("Edge Cases and Error Handling")
    class EdgeCasesTest {

        @Test
        @DisplayName("Should handle maximum size arrays")
        void testMaximumSizeArrays() throws SMBProtocolDecodingException {

            // Invalid unwrap
            assertThrows(ClassCastException.class, () -> sid.unwrap(String.class));
        }

        @Test
        @DisplayName("isEmpty and isBlank edge cases")
        void testEmptyAndBlank() throws Exception {
            // No subauthorities
            SID s1 = new SID("S-1-5");
            assertTrue(s1.isEmpty());

            request.setData(new byte[7], 0, 7); // Not 8-byte aligned
            assertEquals(((Smb2Constants.SMB2_HEADER_LENGTH + 48 + 7 + 7) / 8) * 8, request.size());
        }
    }

    @Nested
    @DisplayName("Edge Case Tests")
    class EdgeCaseTests {

        @Test
        @DisplayName("Should handle null data with non-zero length")
        void testNullDataNonZeroLength() {
            request.setData(null, 0, 100);