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|
|
| import unittest |
|
|
| import numpy as np |
|
|
| from pythainlp.tools.misspell import misspell |
|
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|
|
| def _count_difference(st1: str, st2: str) -> int: |
| |
|
|
| 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})", |
| ) |
|
|
