* @throws Exception
     */
    @Test
    public void testToDate_Null() throws Exception {
        assertThat(toDate(null), is(nullValue()));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testToDate_EmptyString() throws Exception {
        assertThat(toDate(""), is(nullValue()));
    }

    /**
     * @throws Exception
     */
    @Test

    }

    @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);
    }

  }

  @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)
  }

    }

    // 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() {

  @Test
  public void outEdges_oneEdge() {
    addEdge(N1, N2, E12);
    assertThat(network.outEdges(N2)).containsExactly(E12);
    assertThat(network.outEdges(N1)).containsExactly(E12);
  }

  @Test
  public void predecessors_oneEdge() {
    addEdge(N1, N2, E12);
    assertThat(network.predecessors(N2)).containsExactly(N1);
    assertThat(network.predecessors(N1)).containsExactly(N2);
  }

  @Test

    }
  }

  @Override
  @Test
  public void nodes_checkReturnedSetMutability() {
    assume().that(graphIsMutable()).isTrue();

    Set<Integer> nodes = graph.nodes();
    assertThrows(UnsupportedOperationException.class, () -> nodes.add(N2));
    addNode(N1);
    assertThat(graph.nodes()).containsExactlyElementsIn(nodes);
  }

  @Override
  @Test
  public void adjacentNodes_checkReturnedSetMutability() {

        assertEquals(rootCause, exception.getCause().getCause());
    }

    public void test_exceptionSerialization() {
        // Test that the exception is serializable
        String message = "Serialization test";
        Exception cause = new Exception("Test cause");

        SearchQueryException exception = new SearchQueryException(message, cause);

        // Verify serialVersionUID is properly set

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