assertEquals(largeFid, writtenFid);
    }

    @Test
    @DisplayName("Test boundary condition with buffer size equal to data length minus one")
    void testBoundaryBufferSize() {
        // Arrange
        TransTransactNamedPipe trans = new TransTransactNamedPipe(mockConfig, TEST_FID, TEST_DATA, TEST_OFFSET, TEST_LENGTH);
        byte[] dst = new byte[TEST_LENGTH - 1]; // One byte short