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OCRmyPDF/tests/test_tess3.py
T
James R. Barlow 2c24f67deb Rename “tess4” renderer to “sandwich” and make it default in Tess 3.05.01
Tesseract 3.05.01 backported the textonly_pdf=1 which allows the use
of this superior PDF renderer prior to 4.00 alpha. This means that
the tess4 name is no longer accurate, so call it a sandwich because of
its merge-preserve characteristic. Preserve the tess4 name. Fix the
documentation and tests to reflect this.

Make it the default, because it’s better. It does not have the issues
the “tesseract” renderer does prior to Tess 3.05.00 with rendering
PDFs that Ghostscript corrupts, and it produces better output without
re-rastering.

Deprecate some old stuff to avoid the test suite growing obscenely
large.
2017-06-13 13:09:12 -07:00

41 lines
1.3 KiB
Python

#!/usr/bin/env python3
# © 2017 James R. Barlow: github.com/jbarlow83
import pytest
from ocrmypdf.exceptions import ExitCode
from ocrmypdf.exec import tesseract
# Skip all tests in this file if not tesseract 3
pytestmark = pytest.mark.skipif(tesseract.v4(),
reason="tesseract 3.x required")
@pytest.mark.skipif(tesseract.has_textonly_pdf(),
reason="check that missing dep is reported on old tess3")
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
@pytest.mark.skipif(not tesseract.has_textonly_pdf(),
reason="check that feature is exercised on new test3")
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_oem_on_tess3(resources, no_outpdf):
p, _, err = pytest.helpers.run_ocrmypdf(
resources / 'aspect.pdf',
no_outpdf, '--tesseract-oem', '1')
assert p.returncode == ExitCode.ok
assert 'argument ignored' in err