// Then
        assertNull(result);
        verify(request, times(1)).split();
    }

    @Test
    @DisplayName("Test size returns positive message size")
    void testSizeReturnsPositiveValue() {
        // Given
        int expectedSize = 1024;
        when(request.size()).thenReturn(expectedSize);

        // When
        int result = request.size();

        // Then