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import subprocess
from io import StringIO
from unittest.mock import patch, MagicMock
from PIL import Image
from pyocr import builders
from pyocr import cuneiform
from .test_base import BaseTest
class TestCuneiform(BaseTest):
"""
These tests make sure the requirements for the tests are met.
"""
@patch("shutil.which")
def test_available(self, which):
# XXX is it useful?
which.return_value = True
self.assertTrue(cuneiform.is_available())
which.assert_called_once_with("cuneiform")
@patch("subprocess.Popen")
def test_version(self, popen):
stdout = MagicMock()
stdout.stdout.read.return_value = (
b"Cuneiform for Linux 1.1.0\n"
b"Usage: cuneiform [-l languagename -f format --dotmatrix --fax"
b" --singlecolumn -o result_file] imagefile"
)
popen.return_value = stdout
self.assertSequenceEqual(cuneiform.get_version(), (1, 1, 0))
@patch("subprocess.Popen")
def test_version_error(self, popen):
stdout = MagicMock()
stdout.stdout.read.return_value = b"\n"
popen.return_value = stdout
self.assertIsNone(cuneiform.get_version())
@patch("subprocess.Popen")
def test_langs(self, popen):
stdout = MagicMock()
stdout.stdout.read.return_value = (
b"Cuneiform for Linux 1.1.0\n"
b"Supported languages: eng ger fra rus swe spa ita ruseng ukr srp "
b"hrv pol dan por dut cze rum hun bul slv lav lit est tur."
)
popen.return_value = stdout
langs = cuneiform.get_available_languages()
self.assertIn("eng", langs)
self.assertIn("fra", langs)
popen.assert_called_once_with(
["cuneiform", "-l"],
stdout=subprocess.PIPE, stderr=subprocess.STDOUT
)
def test_name(self):
self.assertEqual(cuneiform.get_name(), "Cuneiform (sh)")
def test_can_detect_orientation(self):
self.assertFalse(cuneiform.can_detect_orientation())
def test_available_builders(self):
self.assertListEqual(
cuneiform.get_available_builders(),
[
builders.TextBuilder,
builders.WordBoxBuilder,
builders.LineBoxBuilder,
]
)
class TestCuneiformTxt(BaseTest):
"""
These tests make sure the "usual" OCR works fine. (the one generating
a .txt file)
"""
@patch("pyocr.tesseract.get_version")
def setUp(self, get_version):
super().setUp()
get_version.return_value = (4, 0, 0)
self.builder = builders.TextBuilder()
self.image = Image.new(mode="RGB", size=(1, 1))
self.text_file = StringIO(self._get_file_content("text"))
self.stdout = MagicMock()
self.stdout.stdout.read.return_value = b"Cuneiform for Linux 1.1.0\n"
self.stdout.wait.return_value = 0
self.tmp_filename = "/tmp/cuneiform_n0qfk87otxt"
self.enter = MagicMock()
self.enter.__enter__.return_value = MagicMock()
self.enter.__enter__.return_value.configure_mock(
name=self.tmp_filename
)
@patch("pyocr.tesseract.get_version")
@patch("pyocr.cuneiform.temp_file")
@patch("codecs.open")
@patch("subprocess.Popen")
def test_image_to_string_defaults_to_text_buidler(self, popen, copen,
temp_file, get_version):
get_version.return_value = (4, 0, 0)
popen.return_value = self.stdout
copen.return_value = self.text_file
temp_file.return_value = self.enter
output = cuneiform.image_to_string(self.image)
self.assertEqual(output, self._get_file_content("text").strip())
popen.assert_called_once_with(
["cuneiform", "-f", "text", "-o", self.tmp_filename, "-"],
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT
)
@patch("pyocr.cuneiform.temp_file")
@patch("codecs.open")
@patch("subprocess.Popen")
def test_lang(self, popen, copen, temp_file):
popen.return_value = self.stdout
copen.return_value = self.text_file
temp_file.return_value = self.enter
output = cuneiform.image_to_string(self.image, lang="fra",
builder=self.builder)
self.assertEqual(output, self._get_file_content("text").strip())
popen.assert_called_once_with(
["cuneiform", "-l", "fra", "-f", "text", "-o", self.tmp_filename,
"-"],
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT
)
@patch("pyocr.cuneiform.temp_file")
@patch("codecs.open")
@patch("subprocess.Popen")
def test_text(self, popen, copen, temp_file):
popen.return_value = self.stdout
copen.return_value = self.text_file
temp_file.return_value = self.enter
output = cuneiform.image_to_string(self.image,
builder=self.builder)
self.assertEqual(output, self._get_file_content("text").strip())
popen.assert_called_once_with(
["cuneiform", "-f", "text", "-o", self.tmp_filename, "-"],
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT
)
@patch("subprocess.Popen")
def test_text_error(self, popen):
message = ("Cuneiform for Linux 1.1.0\n"
"Magick: Improper image header (example.png) reported by "
"coders/png.c:2932 (ReadPNGImage)\n")
self.stdout.stdout.read.return_value = message.encode()
self.stdout.wait.return_value = 1
popen.return_value = self.stdout
with self.assertRaises(cuneiform.CuneiformError) as ce:
cuneiform.image_to_string(self.image, builder=self.builder)
self.assertEqual(ce.exception.status, 1)
self.assertEqual(ce.exception.message, message)
@patch("pyocr.cuneiform.temp_file")
@patch("codecs.open")
@patch("subprocess.Popen")
def test_text_non_rgb_image(self, popen, copen, temp_file):
"""This tests that image_to_string works with non RGB mode images and
that image is converted in function."""
image = self.image.convert("L")
popen.return_value = self.stdout
copen.return_value = self.text_file
temp_file.return_value = self.enter
output = cuneiform.image_to_string(image, builder=self.builder)
self.assertEqual(output, self._get_file_content("text").strip())
popen.assert_called_once_with(
["cuneiform", "-f", "text", "-o", self.tmp_filename, "-"],
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT
)
class TestCuneiformDigits(BaseTest):
@patch("pyocr.tesseract.get_version")
def setUp(self, get_version):
super().setUp()
get_version.return_value = (4, 0, 0)
self.builder = builders.DigitBuilder()
self.image = Image.new(mode="RGB", size=(1, 1))
def test_digits_not_implemented(self):
with self.assertRaises(NotImplementedError):
cuneiform.image_to_string(self.image, builder=self.builder)
def test_digits_box_not_implemented(self):
with self.assertRaises(NotImplementedError):
cuneiform.image_to_string(self.image,
builder=self.builder)
class TestCuneiformWordBox(BaseTest):
"""
These tests make sure that cuneiform box handling works fine.
"""
@patch("pyocr.tesseract.get_version")
def setUp(self, get_version):
super().setUp()
get_version.return_value = (4, 0, 0)
self.builder = builders.WordBoxBuilder()
self.image = Image.new(mode="RGB", size=(1, 1))
self.text_file = StringIO(self._get_file_content("cuneiform.words"))
self.stdout = MagicMock()
self.stdout.stdout.read.return_value = b"Cuneiform for Linux 1.1.0\n"
self.stdout.wait.return_value = 0
self.tmp_filename = "/tmp/cuneiform_n0qfk87otxt"
self.enter = MagicMock()
self.enter.__enter__.return_value = MagicMock()
self.enter.__enter__.return_value.configure_mock(
name=self.tmp_filename
)
@patch("pyocr.cuneiform.temp_file")
@patch("codecs.open")
@patch("subprocess.Popen")
def test_word(self, popen, copen, temp_file):
popen.return_value = self.stdout
copen.return_value = self.text_file
temp_file.return_value = self.enter
output = cuneiform.image_to_string(self.image,
builder=self.builder)
popen.assert_called_once_with(
["cuneiform", "-f", "hocr", "-o", self.tmp_filename, "-"],
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT
)
for box in output:
self.assertIsInstance(box, builders.Box)
@patch("subprocess.Popen")
def test_word_error(self, popen):
stdout = MagicMock()
message = ("Cuneiform for Linux 1.1.0\n"
"Magick: Improper image header (example.png) reported by "
"coders/png.c:2932 (ReadPNGImage)\n")
stdout.stdout.read.return_value = message.encode()
stdout.wait.return_value = 1
popen.return_value = stdout
with self.assertRaises(cuneiform.CuneiformError) as ce:
cuneiform.image_to_string(self.image,
builder=self.builder)
self.assertEqual(ce.exception.status, 1)
self.assertEqual(ce.exception.message, message)
class TestCuneiformLineBox(BaseTest):
"""
These tests make sure that cuneiform box handling works fine.
"""
@patch("pyocr.tesseract.get_version")
def setUp(self, get_version):
super().setUp()
get_version.return_value = (4, 0, 0)
self.builder = builders.LineBoxBuilder()
self.image = Image.new(mode="RGB", size=(1, 1))
self.text_file = StringIO(self._get_file_content("cuneiform.lines"))
self.stdout = MagicMock()
self.stdout.stdout.read.return_value = b"Cuneiform for Linux 1.1.0\n"
self.stdout.wait.return_value = 0
self.tmp_filename = "/tmp/cuneiform_n0qfk87otxt"
self.enter = MagicMock()
self.enter.__enter__.return_value = MagicMock()
self.enter.__enter__.return_value.configure_mock(
name=self.tmp_filename
)
@patch("pyocr.cuneiform.temp_file")
@patch("codecs.open")
@patch("subprocess.Popen")
def test_line(self, popen, copen, temp_file):
popen.return_value = self.stdout
copen.return_value = self.text_file
temp_file.return_value = self.enter
output = cuneiform.image_to_string(self.image,
builder=self.builder)
popen.assert_called_once_with(
["cuneiform", "-f", "hocr", "-o", self.tmp_filename, "-"],
stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT
)
for box in output:
self.assertIsInstance(box, builders.LineBox)
@patch("subprocess.Popen")
def test_line_error(self, popen):
message = ("Cuneiform for Linux 1.1.0\n"
"Magick: Improper image header (example.png) reported by "
"coders/png.c:2932 (ReadPNGImage)\n")
self.stdout.stdout.read.return_value = message.encode()
self.stdout.wait.return_value = 1
popen.return_value = self.stdout
with self.assertRaises(cuneiform.CuneiformError) as ce:
cuneiform.image_to_string(self.image,
builder=self.builder)
self.assertEqual(ce.exception.status, 1)
self.assertEqual(ce.exception.message, message)
|
