import unittest
from src.lyricflow_core.engine.syntax import strip_tags, TAG_PATTERN
import re

class TestSyntax(unittest.TestCase):
    def test_tag_pattern(self):
        self.assertTrue(re.match(TAG_PATTERN, "[Chorus]"))
        self.assertTrue(re.match(TAG_PATTERN, "[Verse 1]"))
        self.assertTrue(re.match(TAG_PATTERN, "[Bridge]"))
        # Unclosed tags should also be caught by the current pattern logic if intended
        self.assertTrue(re.match(TAG_PATTERN, "[Unclosed"))

    def test_strip_tags(self):
        self.assertEqual(strip_tags("Hello [Chorus] World"), "Hello  World")
        self.assertEqual(strip_tags("[Verse]Line 1"), "Line 1")
        self.assertEqual(strip_tags("No tags here"), "No tags here")
        self.assertEqual(strip_tags("[A][B]Concatenated"), "Concatenated")

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