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dinglehopper/extracted_text_test.py

71 lines
2.5 KiB
Python

import unicodedata
import pytest
from extracted_text import ExtractedText, ExtractedTextSegment
from uniseg.graphemecluster import grapheme_clusters
from qurator.dinglehopper import seq_align
from collections import namedtuple
def test_text():
test1 = ExtractedText([
ExtractedTextSegment('s0', 'foo'),
ExtractedTextSegment('s1', 'bar'),
ExtractedTextSegment('s2', 'bazinga')
], ' ')
assert test1.text == 'foo bar bazinga'
assert test1.segment_id_for_pos(0) == 's0'
assert test1.segment_id_for_pos(3) is None
assert test1.segment_id_for_pos(10) == 's2'
def test_normalization_check():
with pytest.raises(ValueError, match=r'.*is not normalized.*'):
ExtractedTextSegment('foo', unicodedata.normalize('NFD', 'Schlyñ'))
assert ExtractedTextSegment('foo', unicodedata.normalize('NFC', 'Schlyñ'))
AlignmentElement = namedtuple('AlignmentElement', 'left right left_id right_id')
def test_align():
"""
Test aligning by character while retaining segment id info
The difficulty here is that aligning should work on grapheme clusters,
not Python characters.
"""
test1 = ExtractedText([
ExtractedTextSegment('s0', 'foo'),
ExtractedTextSegment('s1', 'bar'),
ExtractedTextSegment('s2', 'batzinga')
], ' ')
test2 = ExtractedText([
ExtractedTextSegment('x0', 'foo'),
ExtractedTextSegment('x1', 'bar'),
ExtractedTextSegment('x2', '.'), # extra .
ExtractedTextSegment('x3', 'bazim̃ga'), # deletion + different grapheme cluster, m̃ also is two Python characters
], ' ')
left_pos = 0; right_pos = 0; alignment = []
for left, right in seq_align(grapheme_clusters(test1.text), grapheme_clusters(test2.text)):
left_id = test1.segment_id_for_pos(left_pos) if left is not None else None
right_id = test2.segment_id_for_pos(right_pos) if right is not None else None
# XXX note that deletions and inserts only produce one id + None, UI must
# support this, i.e. display for the one id produced
el = AlignmentElement(left, right, left_id, right_id)
alignment.append(el)
if left is not None:
left_pos += len(left)
if right is not None:
right_pos += len(right)
print('test1: {}'.format(test1.text))
print('test2: {}'.format(test2.text))
assert alignment[0] == ('f', 'f', 's0', 'x0')
assert alignment[8] == (None, '.', None, 'x2')
assert alignment[12] == ('t', None, 's2', None)
assert alignment[15] == ('n', '', 's2', 'x3')