File size: 2,228 Bytes
e4b9a7b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | # -*- coding: utf-8 -*-
# SPDX-FileCopyrightText: 2016-2025 PyThaiNLP Project
# SPDX-FileType: SOURCE
# SPDX-License-Identifier: Apache-2.0
import unittest
import numpy as np
from pythainlp.tools.misspell import misspell
def _count_difference(st1: str, st2: str) -> int:
# this assumes len(st1) == len(st2)
count = 0
for i in range(len(st1)):
if st1[i] != st2[i]:
count += 1
return count
class MisspellTestCase(unittest.TestCase):
def setUp(self):
self.texts = ["เรารักคุณมากที่สุดในโลก", "เราอยู่ที่มหาวิทยาลัยขอนแก่น"]
def test_misspell_naive(self):
for text in self.texts:
misspelled = misspell(text, ratio=0.1)
self.assertEqual(len(text), len(misspelled))
diff = _count_difference(text, misspelled)
self.assertGreater(diff, 0, "we have some misspells.")
def test_misspell_with_ratio_0_percent(self):
for text in self.texts:
misspelled = misspell(text, ratio=0.0)
self.assertEqual(len(text), len(misspelled))
diff = _count_difference(text, misspelled)
self.assertEqual(
diff, 0, "we shouldn't have any misspell with ratio=0."
)
def test_misspell_with_ratio_50_percent(self):
for text in self.texts:
misspelled = misspell(text, ratio=0.5)
self.assertEqual(len(text), len(misspelled))
diff = _count_difference(text, misspelled)
self.assertLessEqual(
np.abs(diff - 0.5 * len(text)),
2,
f"expect 0.5*len(text)±2 misspells with ratio=0.5. (Δ={diff})",
)
def test_misspell_with_ratio_100_percent(self):
for text in self.texts:
misspelled = misspell(text, ratio=1)
self.assertEqual(len(text), len(misspelled))
diff = _count_difference(text, misspelled)
self.assertLessEqual(
np.abs(diff - len(text)),
2,
f"expect len(text)-2 misspells with ratio=1.5. (Δ={diff})",
)
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