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Testing Belarusian Phoneme Conversion in Coqui-TTS

This test suite validates the Belarusian phonemization functionality in the Coqui-TTS library, ensuring accurate conversion of Belarusian text to phonetic representations using the fanetyka.jar tool.

Test Coverage Overview

The test suite covers the core functionality of the Belarusian text-to-phonemes conversion system.

Key areas tested include:

Basic text to phoneme conversion accuracy
Handling of environment variable dependencies
Multiple test cases with different Belarusian phrases

Implementation Analysis

The testing approach uses unittest framework with a structured test case pattern. The implementation leverages environment variable checks and warning handlers to manage the external JAR dependency.

Key patterns include:

Test case data separation using string constants
Line-by-line verification of phoneme conversion
Graceful handling of missing dependencies

Technical Details

Testing components include:

Python unittest framework
External fanetyka.jar dependency
Environment variable configuration (BEL_FANETYKA_JAR)
Warning management system
String parsing and comparison utilities

Best Practices Demonstrated

The test implementation showcases several testing best practices:

Clear separation of test data from test logic
Proper error handling and dependency checking
Consistent assertion patterns
Environmental configuration validation
Clean test case organization

coqui-ai/tts

tests/text_tests/test_belarusian_phonemizer.py

            
import os
import unittest
import warnings

from TTS.tts.utils.text.belarusian.phonemizer import belarusian_text_to_phonemes

_TEST_CASES = """
Фанетычны канвертар/fanʲɛˈtɨt͡ʂnɨ kanˈvʲɛrtar
Гэтак мы працавалі/ˈɣɛtak ˈmɨ prat͡saˈvalʲi
"""


class TestText(unittest.TestCase):
    def test_belarusian_text_to_phonemes(self):
        try:
            os.environ["BEL_FANETYKA_JAR"]
        except KeyError:
            warnings.warn(
                "You need to define 'BEL_FANETYKA_JAR' environment variable as path to the fanetyka.jar file to test Belarusian phonemizer",
                Warning,
            )
            return

        for line in _TEST_CASES.strip().split("
"):
            text, phonemes = line.split("/")
            self.assertEqual(belarusian_text_to_phonemes(text), phonemes)


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