How to use the ocrmypdf.exceptions.ExitCode function in ocrmypdf

def test_unpaper_args_invalid_filename(spoof_tesseract_noop, resources, outpdf):
    p, out, err = run_ocrmypdf(
        resources / "skew.pdf",
        outpdf,
        "-c",
        "--unpaper-args",
        "/etc/passwd",
        env=spoof_tesseract_noop,
    )
    assert "No filenames allowed" in err
    assert p.returncode == ExitCode.bad_args

def test_textonly_pdf_on_newer_tess3(resources, no_outpdf):
    p, _, _ = pytest.helpers.run_ocrmypdf(
        resources / 'linn.pdf',
        no_outpdf, '--pdf-renderer', 'sandwich')

    assert p.returncode == ExitCode.ok

def test_textonly_pdf_on_older_tess3(resources, no_outpdf):
    p, _, _ = pytest.helpers.run_ocrmypdf(
        resources / 'linn.pdf',
        no_outpdf, '--pdf-renderer', 'sandwich')

    assert p.returncode == ExitCode.missing_dependency

def test_gs_raster_failure(spoof_no_tess_gs_raster_fail, resources, outpdf):
    p, out, err = run_ocrmypdf(
        resources / 'ccitt.pdf', outpdf, env=spoof_no_tess_gs_raster_fail
    )
    print(err)
    assert p.returncode == ExitCode.child_process_error

def test_gs_render_failure(spoof_no_tess_gs_render_fail, resources, outpdf):
    p, out, err = run_ocrmypdf(
        resources / 'blank.pdf', outpdf, env=spoof_no_tess_gs_render_fail
    )
    print(err)
    assert p.returncode == ExitCode.child_process_error

def test_userunit_ghostscript_fails(poster, no_outpdf, caplog):
    result = run_ocrmypdf_api(poster, no_outpdf, '--output-type=pdfa')
    assert result == ExitCode.input_file
    assert 'not supported by Ghostscript' in caplog.text

def test_stdin(spoof_tesseract_noop, ocrmypdf_exec, resources, outpdf):
    input_file = str(resources / 'francais.pdf')
    output_file = str(outpdf)

    # Runs: ocrmypdf - output.pdf < testfile.pdf
    with open(input_file, 'rb') as input_stream:
        p_args = ocrmypdf_exec + ['-', output_file]
        p = run(
            p_args,
            stdout=PIPE,
            stderr=PIPE,
            stdin=input_stream,
            env=spoof_tesseract_noop,
        )
        assert p.returncode == ExitCode.ok

# Ghostscript doesn't support high Unicode, so neither do we, to be
    # safe
    input_file = resources / 'c02-22.pdf'
    high_unicode = 'U+1030C is: 𐌌'

    p, out, err = run_ocrmypdf(
        input_file,
        no_outpdf,
        '--subject',
        high_unicode,
        '--output-type',
        'pdfa',
        env=spoof_tesseract_noop,
    )

    assert p.returncode == ExitCode.bad_args, err