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import unittest
from io import StringIO
from itertools import product
from random import randint
from unittest.mock import patch
from pyocr import builders
from .test_base import BaseTest
class TestTextBuilder(unittest.TestCase):
@patch("pyocr.tesseract.get_version")
def setUp(self, get_version):
super().setUp()
get_version.return_value = (4, 0, 0)
self.builder = builders.TextBuilder()
def test_init(self):
self.assertListEqual(self.builder.file_extensions, ["txt"])
self.assertListEqual(self.builder.tesseract_flags, ["--psm", "3"])
self.assertListEqual(self.builder.tesseract_configs, [])
self.assertEqual(self.builder.tesseract_layout, 3)
self.assertListEqual(self.builder.cuneiform_args, ["-f", "text"])
@patch("pyocr.tesseract.get_version")
def test_init_cuneiform_params(self, get_version):
get_version.return_value = (4, 0, 0)
# XXX Maybe overkill?
# this check all combinations of parameters
for cun_dotmat, cun_fax, cun_sglcol in product(*((False, True),) * 3):
builder = builders.TextBuilder(
cuneiform_dotmatrix=cun_dotmat,
cuneiform_fax=cun_fax,
cuneiform_singlecolumn=cun_sglcol
)
if cun_dotmat:
self.assertIn("--dotmatrix", builder.cuneiform_args)
else:
self.assertNotIn("--dotmatrix", builder.cuneiform_args)
if cun_fax:
self.assertIn("--fax", builder.cuneiform_args)
else:
self.assertNotIn("--fax", builder.cuneiform_args)
if cun_sglcol:
self.assertIn("--singlecolumn", builder.cuneiform_args)
else:
self.assertNotIn("--singlecolumn", builder.cuneiform_args)
def test_read_file(self):
txt = "first line\nsecond line\n0123456789\n🖨 "
input_fh = StringIO(txt)
output = self.builder.read_file(input_fh)
self.assertEqual(output, txt.strip())
def test_write_file(self):
output = StringIO()
txt = "first line\nsecond line\n0123456789\n🖨 "
self.builder.write_file(output, txt)
output.seek(0)
self.assertEqual(output.read(), txt)
def test_start_line(self):
box = builders.Box("word", ((10, 11), (12, 13)))
self.builder.start_line(box)
self.assertListEqual(self.builder.built_text, [""])
def test_add_word_no_line(self):
box = builders.Box("word", ((10, 11), (12, 13)))
with self.assertRaises(IndexError):
self.builder.add_word(box.content, box)
def test_add_word(self):
box = builders.Box("word", ((10, 11), (12, 13)))
self.builder.start_line(box)
self.builder.add_word(box.content, box)
self.assertEqual(self.builder.built_text[0], box.content)
self.builder.add_word(box.content, box)
self.assertEqual(self.builder.built_text[0],
box.content + " " + box.content)
def test_end_line(self):
before = list(self.builder.built_text)
self.builder.end_line()
self.assertEqual(self.builder.built_text, before)
def test_get_output(self):
box = builders.Box("word", ((10, 11), (12, 13)))
self.builder.start_line(box)
self.builder.add_word("word1", box)
self.builder.add_word("word2", box)
self.builder.start_line(box)
self.builder.add_word("word3", box)
self.builder.add_word("word4", box)
self.assertEqual(self.builder.get_output(), "word1 word2\nword3 word4")
def test_str_method(self):
self.assertEqual(str(self.builder), "Raw text")
class TestWordBoxBuilder(BaseTest):
@patch("pyocr.tesseract.get_version")
def setUp(self, get_version):
super().setUp()
get_version.return_value = (4, 0, 0)
self.builder = builders.WordBoxBuilder()
@patch("pyocr.tesseract.get_version")
def test_init_tesseract_version_3(self, get_version):
for version in range(6):
get_version.return_value = (3, version, 0)
builder = builders.WordBoxBuilder()
self.assertListEqual(builder.tesseract_flags, ["-psm", "1"])
self.assertListEqual(builder.file_extensions, ["html", "hocr"])
self.assertListEqual(builder.tesseract_configs, ["hocr"])
self.assertListEqual(builder.cuneiform_args, ["-f", "hocr"])
self.assertListEqual(builder.word_boxes, [])
self.assertEqual(builder.tesseract_layout, 1)
@patch("pyocr.tesseract.get_version")
def test_init_tesseract_version_4(self, get_version):
get_version.return_value = (4, 0, 0)
builder = builders.WordBoxBuilder()
self.assertListEqual(builder.tesseract_flags, ["--psm", "1"])
self.assertListEqual(builder.file_extensions, ["html", "hocr"])
self.assertListEqual(builder.tesseract_configs, ["hocr"])
self.assertListEqual(builder.cuneiform_args, ["-f", "hocr"])
self.assertListEqual(builder.word_boxes, [])
self.assertEqual(builder.tesseract_layout, 1)
def test_read_file(self):
words = self.builder.read_file(self._get_file_handle("words"))
for word in words:
self.assertIsInstance(word, builders.Box)
def test_empty_read_file(self):
output = StringIO()
self.assertListEqual(self.builder.read_file(output), [])
def test_read_file_bbox(self):
words = self.builder.read_file(self._get_file_handle("words_bbox"))
for word in words:
self.assertIsInstance(word, builders.Box)
self.assertNotEqual(words[-1].content, "preguieoso.")
def test_write_file(self):
output = StringIO()
boxes = [
builders.Box("word1", ((10, 11), (12, 13)), 95),
builders.Box("word2", ((11, 12), (13, 14))),
builders.Box("word3", ((12, 13), (14, 15))),
builders.Box("word4", ((13, 14), (15, 16)), 87),
]
self.builder.write_file(output, boxes)
output.seek(0)
output = output.read()
for box in boxes:
self.assertIn(box.content, output)
self.assertIn("{} {} {} {}".format(
box.position[0][0], box.position[0][1],
box.position[1][0], box.position[1][1],
), output)
self.assertIn(str(box.confidence), output)
def test_start_line(self):
box = builders.Box("word", ((1, 2), (3, 4)))
before = list(self.builder.word_boxes)
self.builder.start_line(box)
self.assertEqual(self.builder.word_boxes, before)
def test_add_word(self):
box = builders.Box("word", ((1, 2), (3, 4)), 42)
self.builder.add_word(box.content, box.position, box.confidence)
for box in self.builder.word_boxes:
self.assertIsInstance(box, builders.Box)
self.assertEqual(self.builder.word_boxes[0], box)
def test_end_line(self):
before = list(self.builder.word_boxes)
self.builder.end_line()
self.assertEqual(self.builder.word_boxes, before)
def test_get_output(self):
boxes = [
builders.Box("word1", ((10, 11), (12, 13)), 95),
builders.Box("word2", ((11, 12), (13, 14))),
builders.Box("word3", ((12, 13), (14, 15))),
builders.Box("word4", ((13, 14), (15, 16)), 87),
]
for box in boxes:
self.builder.add_word(box.content, box.position, box.confidence)
output = self.builder.get_output()
for box, box_expected in zip(output, boxes):
self.assertIsInstance(box, builders.Box)
self.assertEqual(box, box_expected)
self.assertEqual(box.content, box_expected.content)
def test_str_method(self):
self.assertEqual(str(self.builder), "Word boxes")
class TestLineBoxBuilder(BaseTest):
@patch("pyocr.tesseract.get_version")
def setUp(self, get_version):
super().setUp()
get_version.return_value = (4, 0, 0)
self.builder = builders.LineBoxBuilder()
@patch("pyocr.tesseract.get_version")
def test_init_tesseract_version_3(self, get_version):
for version in range(6):
get_version.return_value = (3, version, 0)
builder = builders.LineBoxBuilder()
self.assertListEqual(builder.tesseract_flags, ["-psm", "1"])
self.assertListEqual(builder.file_extensions, ["html", "hocr"])
self.assertListEqual(builder.tesseract_configs, ["hocr"])
self.assertListEqual(builder.cuneiform_args, ["-f", "hocr"])
self.assertListEqual(builder.lines, [])
self.assertEqual(builder.tesseract_layout, 1)
@patch("pyocr.tesseract.get_version")
def test_init_tesseract_version_4(self, get_version):
get_version.return_value = (4, 0, 0)
builder = builders.LineBoxBuilder()
self.assertListEqual(builder.tesseract_flags, ["--psm", "1"])
self.assertListEqual(builder.file_extensions, ["html", "hocr"])
self.assertListEqual(builder.tesseract_configs, ["hocr"])
self.assertListEqual(builder.cuneiform_args, ["-f", "hocr"])
self.assertListEqual(builder.lines, [])
self.assertEqual(builder.tesseract_layout, 1)
def test_read_file(self):
for input_fh in (self._get_file_handle("tesseract.lines"),
self._get_file_handle("cuneiform.lines")):
lines = self.builder.read_file(input_fh)
for line in lines:
self.assertIsInstance(line, builders.LineBox)
def test_empty_read_file(self):
empty = StringIO()
self.assertListEqual(self.builder.read_file(empty), [])
def test_write_file(self):
output_fh = StringIO()
lines = []
for l in range(4): # noqa: E741
boxes = []
for b in range(4):
word = "word" + str(4*l+b)
position = ((4*l+b, 4*l+b+1), (4*l+b+2, 4*l+b+3))
boxes.append(builders.Box(word, position, randint(0, 100)))
line_position = ((4*l, 4*(l+1)), (4*l+2, 4*(l+1)+2))
lines.append(builders.LineBox(boxes, line_position))
self.builder.write_file(output_fh, lines)
output_fh.seek(0)
output = output_fh.read()
for line in lines:
for box in line.word_boxes:
self.assertIn(box.content, output)
self.assertIn("{} {} {} {}".format(
box.position[0][0], box.position[0][1],
box.position[1][0], box.position[1][1],
), output)
self.assertIn(str(box.confidence), output)
def test_start_line(self):
position = ((1, 2), (3, 4))
self.builder.start_line(position)
self.assertEqual(len(self.builder.lines), 1)
self.assertListEqual(self.builder.lines,
[builders.LineBox([], position)])
self.builder.start_line(position)
self.assertEqual(len(self.builder.lines), 1)
self.assertListEqual(self.builder.lines,
[builders.LineBox([], position)])
def test_add_word_no_line(self):
box = builders.Box("word", ((1, 2), (3, 4)), 42)
with self.assertRaises(IndexError):
self.builder.add_word(box.content, box.position, box.confidence)
self.assertListEqual(self.builder.lines, [])
def test_end_line(self):
before = list(self.builder.lines)
self.builder.end_line()
self.assertEqual(self.builder.lines, before)
def test_get_output(self):
lines = []
for l in range(4): # noqa: E741
boxes = []
for b in range(4):
word = "word" + str(4*l+b)
position = ((4*l+b, 0), (0, 0))
boxes.append(builders.Box(word, position, randint(0, 100)))
line_position = ((4*l, 4*(l+1)), (4*l+2, 4*(l+1)+2))
lines.append(builders.LineBox(boxes, line_position))
for line in lines:
self.builder.start_line(line.position)
for word in line.word_boxes:
self.builder.add_word(word.content, word.position,
word.confidence)
self.builder.end_line() # could be useful in future
output = self.builder.get_output()
for line, line_expected in zip(output, lines):
self.assertIsInstance(line, builders.LineBox)
self.assertEqual(line, line_expected)
def test_missing_text_bug_129(self):
fd = self._get_file_handle("lohnsteuerbescheinigung.hocr")
lines = self.builder.read_file(fd)
self.assertIn("Lohnsteuerbescheinigung", lines[0])
class TestDigitBuilder(unittest.TestCase):
@patch("pyocr.tesseract.get_version")
def setUp(self, get_version):
super().setUp()
get_version.return_value = (4, 0, 0)
self.builder = builders.DigitBuilder()
def test_init(self):
self.assertIn("digits", self.builder.tesseract_configs)
def test_str_method(self):
self.assertEqual(str(self.builder), "Digits raw text")
class TestDigitLineBoxBuilder(unittest.TestCase):
@patch("pyocr.tesseract.get_version")
def setUp(self, get_version):
super().setUp()
get_version.return_value = (4, 0, 0)
self.builder = builders.DigitLineBoxBuilder()
def test_init(self):
self.assertIn("digits", self.builder.tesseract_configs)
def test_str_method(self):
self.assertEqual(str(self.builder), "Digit line boxes")
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