import sys
import unittest
from pathlib import Path
sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
from changelog import parse, render

class ChangelogTests(unittest.TestCase):
    def test_conventional_commit(self):
        self.assertEqual(parse('feat(api): add pagination'), ('Added', '**api:** add pagination'))
    def test_breaking_commit(self):
        self.assertEqual(parse('fix!: remove legacy endpoint'), ('Fixed', '**BREAKING:** remove legacy endpoint'))
    def test_unknown_commit_is_preserved(self):
        self.assertEqual(parse('Improve wording'), ('Other', 'Improve wording'))
    def test_render_is_grouped_and_deduplicated(self):
        text = render(['fix: stop crash', 'feat: add export', 'fix: stop crash'])
        self.assertIn('### Added\n\n- add export', text)
        self.assertIn('### Fixed\n\n- stop crash', text)
        self.assertEqual(text.count('- stop crash'), 1)

if __name__ == '__main__':
    unittest.main()