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"""Unit tests for STTProviderBase abstract class."""
import pytest
from unittest.mock import Mock, patch, MagicMock
import tempfile
from pathlib import Path
from src.infrastructure.base.stt_provider_base import STTProviderBase
from src.domain.models.audio_content import AudioContent
from src.domain.models.text_content import TextContent
from src.domain.exceptions import SpeechRecognitionException
class ConcreteSTTProvider(STTProviderBase):
"""Concrete implementation for testing."""
def __init__(self, provider_name="test", supported_languages=None, available=True, models=None):
super().__init__(provider_name, supported_languages)
self._available = available
self._models = models or ["model1", "model2"]
self._should_fail = False
self._transcription_result = "Hello world"
def _perform_transcription(self, audio_path, model):
if self._should_fail:
raise Exception("Test transcription error")
return self._transcription_result
def is_available(self):
return self._available
def get_available_models(self):
return self._models
def get_default_model(self):
return self._models[0] if self._models else "default"
def set_should_fail(self, should_fail):
self._should_fail = should_fail
def set_transcription_result(self, result):
self._transcription_result = result
class TestSTTProviderBase:
"""Test cases for STTProviderBase abstract class."""
def setup_method(self):
"""Set up test fixtures."""
self.provider = ConcreteSTTProvider()
self.audio_content = AudioContent(
data=b"fake_audio_data",
format="wav",
sample_rate=16000,
duration=5.0,
filename="test.wav"
)
def test_provider_initialization(self):
"""Test provider initialization with default values."""
provider = ConcreteSTTProvider("test_provider", ["en", "es"])
assert provider.provider_name == "test_provider"
assert provider.supported_languages == ["en", "es"]
assert isinstance(provider._temp_dir, Path)
assert provider._temp_dir.exists()
def test_provider_initialization_no_languages(self):
"""Test provider initialization without supported languages."""
provider = ConcreteSTTProvider("test_provider")
assert provider.provider_name == "test_provider"
assert provider.supported_languages == []
@patch('builtins.open', create=True)
def test_transcribe_success(self, mock_open):
"""Test successful transcription."""
mock_file = MagicMock()
mock_open.return_value.__enter__.return_value = mock_file
result = self.provider.transcribe(self.audio_content, "model1")
assert isinstance(result, TextContent)
assert result.text == "Hello world"
assert result.language == "en"
assert result.encoding == "utf-8"
def test_transcribe_empty_audio_fails(self):
"""Test that empty audio data raises exception."""
empty_audio = AudioContent(
data=b"",
format="wav",
sample_rate=16000,
duration=0.1
)
with pytest.raises(SpeechRecognitionException, match="Audio data cannot be empty"):
self.provider.transcribe(empty_audio, "model1")
def test_transcribe_audio_too_long_fails(self):
"""Test that audio longer than 1 hour raises exception."""
long_audio = AudioContent(
data=b"fake_audio_data",
format="wav",
sample_rate=16000,
duration=3601.0 # Over 1 hour
)
with pytest.raises(SpeechRecognitionException, match="Audio duration exceeds maximum limit"):
self.provider.transcribe(long_audio, "model1")
def test_transcribe_audio_too_short_fails(self):
"""Test that audio shorter than 100ms raises exception."""
short_audio = AudioContent(
data=b"fake_audio_data",
format="wav",
sample_rate=16000,
duration=0.05 # 50ms
)
with pytest.raises(SpeechRecognitionException, match="Audio duration too short"):
self.provider.transcribe(short_audio, "model1")
def test_transcribe_invalid_format_fails(self):
"""Test that invalid audio format raises exception."""
# Create audio with invalid format by mocking is_valid_format
invalid_audio = AudioContent(
data=b"fake_audio_data",
format="wav",
sample_rate=16000,
duration=5.0
)
with patch.object(invalid_audio, 'is_valid_format', False):
with pytest.raises(SpeechRecognitionException, match="Unsupported audio format"):
self.provider.transcribe(invalid_audio, "model1")
@patch('builtins.open', create=True)
def test_transcribe_provider_error(self, mock_open):
"""Test handling of provider-specific errors."""
mock_file = MagicMock()
mock_open.return_value.__enter__.return_value = mock_file
self.provider.set_should_fail(True)
with pytest.raises(SpeechRecognitionException, match="STT transcription failed"):
self.provider.transcribe(self.audio_content, "model1")
@patch('builtins.open', create=True)
@patch('pathlib.Path.unlink')
def test_transcribe_cleanup_temp_file(self, mock_unlink, mock_open):
"""Test that temporary files are cleaned up."""
mock_file = MagicMock()
mock_open.return_value.__enter__.return_value = mock_file
self.provider.transcribe(self.audio_content, "model1")
# Verify cleanup was attempted
mock_unlink.assert_called()
@patch('builtins.open', create=True)
def test_preprocess_audio(self, mock_open):
"""Test audio preprocessing."""
mock_file = MagicMock()
mock_open.return_value.__enter__.return_value = mock_file
processed_path = self.provider._preprocess_audio(self.audio_content)
assert isinstance(processed_path, Path)
assert processed_path.suffix == ".wav"
mock_file.write.assert_called_once_with(self.audio_content.data)
def test_preprocess_audio_error(self):
"""Test audio preprocessing error handling."""
with patch('builtins.open', side_effect=IOError("Test error")):
with pytest.raises(SpeechRecognitionException, match="Audio preprocessing failed"):
self.provider._preprocess_audio(self.audio_content)
@patch('pydub.AudioSegment.from_wav')
@patch('pydub.AudioSegment.export')
def test_convert_audio_format_wav(self, mock_export, mock_from_wav):
"""Test audio format conversion for WAV."""
mock_audio = Mock()
mock_audio.set_frame_rate.return_value.set_channels.return_value = mock_audio
mock_from_wav.return_value = mock_audio
test_path = Path("/tmp/test.wav")
result_path = self.provider._convert_audio_format(test_path, self.audio_content)
mock_from_wav.assert_called_once_with(test_path)
mock_audio.set_frame_rate.assert_called_once_with(16000)
mock_audio.set_channels.assert_called_once_with(1)
mock_export.assert_called_once()
@patch('pydub.AudioSegment.from_mp3')
def test_convert_audio_format_mp3(self, mock_from_mp3):
"""Test audio format conversion for MP3."""
mp3_audio = AudioContent(
data=b"fake_mp3_data",
format="mp3",
sample_rate=44100,
duration=5.0
)
mock_audio = Mock()
mock_audio.set_frame_rate.return_value.set_channels.return_value = mock_audio
mock_from_mp3.return_value = mock_audio
test_path = Path("/tmp/test.mp3")
self.provider._convert_audio_format(test_path, mp3_audio)
mock_from_mp3.assert_called_once_with(test_path)
def test_convert_audio_format_no_pydub(self):
"""Test audio format conversion when pydub is not available."""
test_path = Path("/tmp/test.wav")
with patch('pydub.AudioSegment', side_effect=ImportError("pydub not available")):
result_path = self.provider._convert_audio_format(test_path, self.audio_content)
# Should return original path when pydub is not available
assert result_path == test_path
def test_convert_audio_format_error(self):
"""Test audio format conversion error handling."""
test_path = Path("/tmp/test.wav")
with patch('pydub.AudioSegment.from_wav', side_effect=Exception("Conversion error")):
result_path = self.provider._convert_audio_format(test_path, self.audio_content)
# Should return original path on error
assert result_path == test_path
def test_detect_language_english(self):
"""Test language detection for English text."""
english_text = "The quick brown fox jumps over the lazy dog and it is very nice"
language = self.provider._detect_language(english_text)
assert language == "en"
def test_detect_language_few_indicators(self):
"""Test language detection with few English indicators."""
text = "Hello world"
language = self.provider._detect_language(text)
assert language == "en"
def test_detect_language_no_indicators(self):
"""Test language detection with no clear indicators."""
text = "xyz abc def"
language = self.provider._detect_language(text)
assert language == "en" # Should default to English
def test_detect_language_error(self):
"""Test language detection error handling."""
with patch.object(self.provider, '_detect_language', side_effect=Exception("Detection error")):
language = self.provider._detect_language("test")
assert language is None
def test_ensure_temp_directory(self):
"""Test temporary directory creation."""
temp_dir = self.provider._ensure_temp_directory()
assert isinstance(temp_dir, Path)
assert temp_dir.exists()
assert temp_dir.is_dir()
assert "stt_temp" in str(temp_dir)
def test_cleanup_temp_file(self):
"""Test temporary file cleanup."""
# Create a temporary file
temp_file = self.provider._temp_dir / "test_file.wav"
temp_file.touch()
assert temp_file.exists()
self.provider._cleanup_temp_file(temp_file)
assert not temp_file.exists()
def test_cleanup_temp_file_not_exists(self):
"""Test cleanup of non-existent file."""
non_existent = Path("/tmp/non_existent_file.wav")
# Should not raise exception
self.provider._cleanup_temp_file(non_existent)
def test_cleanup_temp_file_error(self):
"""Test cleanup error handling."""
with patch('pathlib.Path.unlink', side_effect=OSError("Permission denied")):
temp_file = Path("/tmp/test.wav")
# Should not raise exception
self.provider._cleanup_temp_file(temp_file)
@patch('time.time')
@patch('pathlib.Path.glob')
def test_cleanup_old_temp_files(self, mock_glob, mock_time):
"""Test cleanup of old temporary files."""
mock_time.return_value = 1000000
# Mock old file
old_file = Mock()
old_file.is_file.return_value = True
old_file.stat.return_value.st_mtime = 900000 # Old file
# Mock recent file
recent_file = Mock()
recent_file.is_file.return_value = True
recent_file.stat.return_value.st_mtime = 999000 # Recent file
mock_glob.return_value = [old_file, recent_file]
self.provider._cleanup_old_temp_files(24)
# Old file should be deleted
old_file.unlink.assert_called_once()
recent_file.unlink.assert_not_called()
def test_cleanup_old_temp_files_error(self):
"""Test cleanup error handling."""
with patch.object(self.provider._temp_dir, 'glob', side_effect=Exception("Test error")):
# Should not raise exception
self.provider._cleanup_old_temp_files()
def test_handle_provider_error(self):
"""Test provider error handling."""
original_error = ValueError("Original error")
with pytest.raises(SpeechRecognitionException) as exc_info:
self.provider._handle_provider_error(original_error, "testing")
assert "test error during testing: Original error" in str(exc_info.value)
assert exc_info.value.__cause__ is original_error
def test_handle_provider_error_no_context(self):
"""Test provider error handling without context."""
original_error = ValueError("Original error")
with pytest.raises(SpeechRecognitionException) as exc_info:
self.provider._handle_provider_error(original_error)
assert "test error: Original error" in str(exc_info.value)
assert exc_info.value.__cause__ is original_error
def test_abstract_methods_not_implemented(self):
"""Test that abstract methods raise NotImplementedError."""
# Create instance of base class directly (should fail)
with pytest.raises(TypeError):
STTProviderBase("test")
def test_provider_unavailable(self):
"""Test behavior when provider is unavailable."""
provider = ConcreteSTTProvider(available=False)
assert provider.is_available() is False
def test_no_models_available(self):
"""Test behavior when no models are available."""
provider = ConcreteSTTProvider(models=[])
assert provider.get_available_models() == []
assert provider.get_default_model() == "default" |