public void test_toLowerCase_privateMethod() throws Exception {
        // Test private method using reflection
        Method method = KeyMatchHelper.class.getDeclaredMethod("toLowerCase", String.class);
        method.setAccessible(true);

        String result = (String) method.invoke(keyMatchHelper, "JAVA");
        assertEquals("java", result);

        result = (String) method.invoke(keyMatchHelper, "Mixed_Case");

    Class<?> abstractFutureStateClass = classLoader.loadClass(AbstractFutureState.class.getName());
    Method helperMethod = abstractFutureStateClass.getDeclaredMethod("atomicHelperTypeForTest");
    helperMethod.setAccessible(true);
    assertThat(helperMethod.invoke(null)).isEqualTo(expectedHelperClassName);
  }

  private static ClassLoader getClassLoader(Set<String> disallowedClassNames) {

            f.setAccessible(true);
            return f.get(target);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    private static void setField(Object target, String name, Object value) {
        try {
            var f = target.getClass().getDeclaredField(name);
            f.setAccessible(true);
            f.set(target, value);

    @Test
    void testGetResponseLength() throws Exception {
        // Use reflection to set dataCount
        Field dataCountField = SmbComTransactionResponse.class.getDeclaredField("dataCount");
        dataCountField.setAccessible(true);
        dataCountField.setInt(response, 42);

        assertEquals(42, response.getResponseLength());
    }

    @Test
    void testGetResponseLengthWithZeroDataCount() {

            @Override
            public Unsafe run() throws Exception {
              Class<Unsafe> k = Unsafe.class;
              for (Field f : k.getDeclaredFields()) {
                f.setAccessible(true);
                Object x = f.get(null);
                if (k.isInstance(x)) return k.cast(x);
              }
              throw new NoSuchFieldError("the Unsafe");
            }
          });

            (PrivilegedExceptionAction<Unsafe>)
                () -> {
                  Class<Unsafe> k = Unsafe.class;
                  for (Field f : k.getDeclaredFields()) {
                    f.setAccessible(true);
                    Object x = f.get(null);
                    if (k.isInstance(x)) {
                      return k.cast(x);
                    }
                  }

        // Package-private setter for attempt number
        try {
            java.lang.reflect.Field field = SmbOperationException.class.getDeclaredField("attemptNumber");
            field.setAccessible(true);
            field.set(this, attemptNumber);
        } catch (Exception e) {
            // Ignore
        }
    }

    private static String formatMessage(ErrorCode errorCode, String message) {

    }
    Constructor<T> constructor;
    try {
      constructor = type.getConstructor();
    } catch (NoSuchMethodException e) {
      return arbitraryConstantInstanceOrNull(type);
    }
    constructor.setAccessible(true); // accessibility check is too slow
    try {
      return constructor.newInstance();
    } catch (InstantiationException | IllegalAccessException impossible) {
      throw new AssertionError(impossible);

                java.lang.reflect.Field propField =
                        org.lastaflute.core.direction.ObjectiveConfig.class.getDeclaredField("_javaPropertiesResult");
                propField.setAccessible(true);

                // Create a mock JavaPropertiesResult
                java.util.Properties props = new java.util.Properties();
                props.setProperty("job.max.crawler.processes", "5");

        // Force internal field to null via reflection to exercise defensive branch
        Field field = SecurityBlob.class.getDeclaredField("b");
        field.setAccessible(true);
        field.set(blob, null);

        // Act & Assert
        assertEquals(0, blob.length(), "length() should return 0 when internal array is null");
    }

    @Spy