verify(signingDigest, times(5)).verify(any(byte[].class), anyInt(), anyInt(), anyInt(), any());
    }

    @Test
    @DisplayName("Test sign method invocation with argument capture")
    void testSignMethodArgumentCapture() {
        // Arrange
        ArgumentCaptor<byte[]> dataCaptor = ArgumentCaptor.forClass(byte[].class);
        ArgumentCaptor<Integer> offsetCaptor = ArgumentCaptor.forClass(Integer.class);