FileSizeFormat format = new FileSizeFormat();

        long _0_bytes = 0L;
        assertEquals("0 B", format.formatProgress(_0_bytes, _0_bytes));
    }

    @Test
    void testProgressedSizeWithSize() {
        FileSizeFormat format = new FileSizeFormat();

        long _0_bytes = 0L;
        long _400_bytes = 400L;
        long _800_bytes = 2L * _400_bytes;