}

    @Test
    @DisplayName("Test singleton instance")
    void testSingletonInstance() {
        SecurityAuditLogger logger1 = SecurityAuditLogger.getInstance();
        SecurityAuditLogger logger2 = SecurityAuditLogger.getInstance();
        assertSame(logger1, logger2, "SecurityAuditLogger should be a singleton");
    }

    @Test
    @DisplayName("Test log authentication success")

    }

    // Test getScriptEngine with uppercase query
    public void test_getScriptEngine_uppercaseQuery() {
        TestScriptEngine engine = new TestScriptEngine();
        scriptEngineFactory.add("test", engine);

        ScriptEngine retrieved = scriptEngineFactory.getScriptEngine("TEST");
        assertNotNull(retrieved);
        assertEquals(engine, retrieved);
    }

    /**
     * Edge case – constructor using the winerr flag.
     */
    @Test
    @DisplayName("Winerr code 123 – message equals 123")
    void testConstructorWithWinerr() {
        SmbException ex = new SmbException(123, true);
        assertEquals("123", ex.getMessage());
        assertEquals(123, ex.getNtStatus());
    }

    /**
     * Parameterised test covering many error codes.
     * - Error code 0 returns 0 (NT_STATUS_SUCCESS)

  }

  @Test fun setInstant() {
    val expected = Instant.ofEpochMilli(1000L)
    val headers =
      Headers
        .Builder()
        .add("Test-Instant", Instant.ofEpochMilli(0L))
        .set("Test-Instant", expected)
        .build()
    assertThat(headers["Test-Instant"]).isEqualTo("Thu, 01 Jan 1970 00:00:01 GMT")
    assertThat(headers.getInstant("Test-Instant")).isEqualTo(expected)
  }

    }

    public void test_isNullsSuppressed() {
        // Test that nulls are suppressed
        assertTrue(provider.isNullsSuppressed());
    }

    public void test_isPrettyPrintSuppressed() {
        // Test that pretty print is not suppressed
        assertFalse(provider.isPrettyPrintSuppressed());
    }

    public void test_provideMappingOption() {
        // Test that mapping option is provided correctly

    }

    @Test
    @DisplayName("getResponse before initResponse returns null")
    void getResponseInitiallyNull() {
        SmbComNTCreateAndX req = createRequest(0, 0);
        assertNull(req.getResponse(), "Before init, response is null");
    }

    @Test
    @DisplayName("toString representation contains expected fields")

        .testAllPublicInstanceMethods(monitor);
  }

  // TODO: Test enter(long, TimeUnit).
  // TODO: Test enterWhen(Guard, long, TimeUnit).
  // TODO: Test enterIf(Guard, long, TimeUnit).
  // TODO: Test waitFor(Guard, long, TimeUnit).
  // TODO: Test getQueueLength().
  // TODO: Test hasQueuedThreads().
  // TODO: Test getWaitQueueLength(Guard).
  // TODO: Test automatic signaling before leave, waitFor, and reentrant enterWhen.

    }

    // Test append method with String value
    public void test_append_stringValue() {
        StringBuilder buf = new StringBuilder();
        Supplier<Object> supplier = () -> "test string";

        monitorTarget.append(buf, "stringKey", supplier);
        assertEquals("\"stringKey\":\"test string\"", buf.toString());
    }

    // Test append method with String containing special characters

    }

    @Test
    @DisplayName("Test compression context type")
    public void testContextType() {
        assertEquals(CompressionNegotiateContext.NEGO_CTX_COMPRESSION_TYPE, context.getContextType());
    }

    @Test
    @DisplayName("Test supported algorithms")
    public void testSupportedAlgorithms() {

import javax.security.auth.kerberos.KerberosPrincipal;

import org.junit.jupiter.api.Test;

/**
 * Tests for the PacMac class.
 */
class PacMacTest {

    private static final byte[] TEST_DATA = "test data".getBytes();
    private static final KerberosPrincipal TEST_PRINCIPAL = new KerberosPrincipal("test@REALM");

    /**
     * Test method for