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149 lines
4.5 KiB
Python
149 lines
4.5 KiB
Python
# © 2017 James R. Barlow: github.com/jbarlow83
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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import logging
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import os
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import subprocess
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from os import fspath
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from pathlib import Path
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import pytest
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from ocrmypdf import pdfinfo
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from ocrmypdf._exec import tesseract
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from ocrmypdf.exceptions import MissingDependencyError
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from .conftest import check_ocrmypdf
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# pylint: disable=redefined-outer-name
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@pytest.mark.parametrize('basename', ['graph_ocred.pdf', 'cardinal.pdf'])
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def test_skip_pages_does_not_replicate(resources, basename, outdir):
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infile = resources / basename
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outpdf = outdir / basename
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check_ocrmypdf(
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infile,
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outpdf,
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'--pdf-renderer',
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'sandwich',
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'--force-ocr',
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'--tesseract-timeout',
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'0',
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)
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info_in = pdfinfo.PdfInfo(infile)
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info = pdfinfo.PdfInfo(outpdf)
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for page in info:
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assert len(page.images) == 1, "skipped page was replicated"
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for n, info_out_n in enumerate(info):
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assert info_out_n.width_inches == info_in[n].width_inches, "output resized"
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assert info_out_n.height_inches == info_in[n].height_inches, "output resized"
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def test_content_preservation(resources, outpdf):
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infile = resources / 'masks.pdf'
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check_ocrmypdf(
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infile, outpdf, '--pdf-renderer', 'sandwich', '--tesseract-timeout', '0'
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)
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info = pdfinfo.PdfInfo(outpdf)
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page = info[0]
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assert len(page.images) > 1, "masks were rasterized"
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@pytest.mark.skipif(tesseract.version() > '5', reason="doesn't fool Tess 5")
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def test_no_languages(tmp_path, monkeypatch):
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(tmp_path / 'tessdata').mkdir()
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monkeypatch.setenv('TESSDATA_PREFIX', fspath(tmp_path))
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with pytest.raises(MissingDependencyError):
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tesseract.get_languages()
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def test_image_too_large_hocr(monkeypatch, resources, outdir):
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def dummy_run(args, *, env=None, **kwargs):
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raise subprocess.CalledProcessError(1, 'tesseract', output=b'Image too large')
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monkeypatch.setattr(tesseract, 'run', dummy_run)
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tesseract.generate_hocr(
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input_file=resources / 'crom.png',
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output_hocr=outdir / 'out.hocr',
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output_text=outdir / 'out.txt',
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languages=['eng'],
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engine_mode=None,
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tessconfig=[],
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timeout=180.0,
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pagesegmode=None,
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thresholding=0,
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user_words=None,
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user_patterns=None,
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)
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assert "name='ocr-capabilities'" in Path(outdir / 'out.hocr').read_text()
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def test_image_too_large_pdf(monkeypatch, resources, outdir):
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def dummy_run(args, *, env=None, **kwargs):
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raise subprocess.CalledProcessError(1, 'tesseract', output=b'Image too large')
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monkeypatch.setattr(tesseract, 'run', dummy_run)
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tesseract.generate_pdf(
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input_file=resources / 'crom.png',
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output_pdf=outdir / 'pdf.pdf',
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output_text=outdir / 'txt.txt',
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languages=['eng'],
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engine_mode=None,
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tessconfig=[],
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timeout=180.0,
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pagesegmode=None,
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thresholding=0,
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user_words=None,
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user_patterns=None,
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)
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assert Path(outdir / 'txt.txt').read_text() == '[skipped page]'
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if os.name != 'nt': # different semantics
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assert Path(outdir / 'pdf.pdf').stat().st_size == 0
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def test_timeout(caplog):
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tesseract.page_timedout(5)
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assert "took too long" in caplog.text
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@pytest.mark.parametrize(
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'in_, logged',
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[
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(b'Tesseract Open Source', ''),
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(b'lots of diacritics blah blah', 'diacritics'),
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(b'Warning in pixReadMem', ''),
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(b'OSD: Weak margin', 'unsure about page orientation'),
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(b'Error in pixScanForForeground', ''),
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(b'Error in boxClipToRectangle', ''),
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(b'an unexpected error', 'an unexpected error'),
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(b'a dire warning', 'a dire warning'),
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(b'read_params_file something', 'read_params_file'),
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(b'an innocent message', 'innocent'),
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(b'\x7f\x7f\x80innocent unicode failure', 'innocent'),
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],
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)
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def test_tesseract_log_output(caplog, in_, logged):
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caplog.set_level(logging.INFO)
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tesseract.tesseract_log_output(in_)
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if logged == '':
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assert caplog.text == ''
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else:
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assert logged in caplog.text
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def test_tesseract_log_output_raises(caplog):
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with pytest.raises(tesseract.TesseractConfigError):
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tesseract.tesseract_log_output(b'parameter not found: moo')
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assert 'not found' in caplog.text
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