public void writePDF( OutputStream output ) throws IOException
    {
        output.write(formatString().getBytes(StandardCharsets.ISO_8859_1));
    }
@Test
    void testWritePDF()
    {
        WritePDFTester writePDFTester = new WritePDFTester();
        writePDFTester.runTests();

        // test a corner case as described in PDFBOX-1778
        writePDFTester.runTest(0.000000000000000000000000000000001f);
    }