Update transcriber test cases for whisper, whisperx. Add device catch to whisperx.

scraibe/transcriber.py

@@ -30,6 +30,7 @@ from whisperx.asr import WhisperModel
 from whisperx import load_model as whisperx_load_model
 from typing import TypeVar, Union, Optional
 from torch import Tensor, device
+from torch.cuda import is_available as cuda_is_available
 from numpy import ndarray
 from inspect import getfullargspec
 from abc import abstractmethod
@@ -115,15 +116,14 @@ class Transcriber:
 
         print(f'Transcript saved to {save_path}')
 
-    @classmethod
-    def load_model(cls,
-                   model: str = "medium",
+    @staticmethod
+    def load_model(model: str = "medium",
                    whisper_type: str = 'whisper',
                    download_root: str = WHISPER_DEFAULT_PATH,
                    device: Optional[Union[str, device]] = None,
                    in_memory: bool = False,
                    *args, **kwargs
-                   ) -> 'Transcriber':
+                   ) -> 'Union[WhisperTranscriber, WhisperXTranscriber]':
         """
         Load whisper model.
 
@@ -278,6 +278,9 @@ class WhisperTranscriber(Transcriber):
 
         return whisper_kwargs
 
+    def __repr__(self) -> str:
+        return f"WhisperTranscriber(model_name={self.model_name}, model={self.model})"
+
 
 class WhisperXTranscriber(Transcriber):
     def __init__(self, model: whisper, model_name: str) -> None:
@@ -345,6 +348,8 @@ class WhisperXTranscriber(Transcriber):
         Returns:
             Transcriber: A Transcriber object initialized with the specified model.
         """
+        if device is None:
+            device = "cuda" if cuda_is_available() else "cpu"
         if not isinstance(device, str):
             device = str(device)
         _model = whisperx_load_model(model, download_root=download_root,
@@ -375,3 +380,6 @@ class WhisperXTranscriber(Transcriber):
             whisper_kwargs["language"] = language
 
         return whisper_kwargs
+
+    def __repr__(self) -> str:
+        return f"WhisperXTranscriber(model_name={self.model_name}, model={self.model})"

test/test_transcriber.py

@@ -1,5 +1,5 @@
 import pytest
-from scraibe import Transcriber
+from scraibe import Transcriber, WhisperTranscriber, WhisperXTranscriber
 import torch
 
 
@@ -19,7 +19,7 @@ def test_transcriber(mock_load_model, audio_file, expected_transcription):
         expected_transcription (_type_): _description_
 
     mock_model = mock_load_model.return_value
-    mock_model.transcribe.return_value ={"text": expected_transcription} 
+    mock_model.transcribe.return_value ={"text": expected_transcription}
 
     transcriber = Transcriber.load_model(model="medium")
 
@@ -29,12 +29,34 @@ def test_transcriber(mock_load_model, audio_file, expected_transcription):
 
 
 @pytest.fixture
-def transcriber_instance():
-    return Transcriber.load_model('medium')
+def whisper_instance():
+    return Transcriber.load_model('medium', whisper_type='whisper')
 
 
-def test_transcriber_initialization(transcriber_instance):
-    assert isinstance(transcriber_instance, Transcriber)
+@pytest.fixture
+def whisperx_instance():
+    return Transcriber.load_model('medium', whisper_type='whisperx')
+
+
+def test_whisper_base_initialization(whisper_instance):
+    assert isinstance(whisper_instance, Transcriber)
+
+
+def test_whisperx_base_initialization(whisperx_instance):
+    assert isinstance(whisperx_instance, Transcriber)
+
+
+def test_whisper_transcriber_initialization(whisper_instance):
+    assert isinstance(whisper_instance, WhisperTranscriber)
+
+
+def test_whisperx_transcriber_initialization(whisperx_instance):
+    assert isinstance(whisperx_instance, WhisperXTranscriber)
+
+
+def test_wrong_transcriber_initialization():
+    with pytest.raises(ValueError):
+        Transcriber.load_model('medium', whisper_type='wrong_whisper')
 
 
 def test_get_whisper_kwargs():
@@ -43,8 +65,15 @@ def test_get_whisper_kwargs():
     assert not valid_kwargs == {"arg1": 1, "arg3": 3}
 
 
-def test_transcribe(transcriber_instance):
-    model = transcriber_instance
+def test_whisper_transcribe(whisper_instance):
+    model = whisper_instance
+    # mocker.patch.object(transcriber_instance.model, 'transcribe', return_value={'Hello, World !'} )
+    transcript = model.transcribe('test/audio_test_2.mp4')
+    assert isinstance(transcript, str)
+
+
+def test_whisperx_transcribe(whisperx_instance):
+    model = whisperx_instance
     # mocker.patch.object(transcriber_instance.model, 'transcribe', return_value={'Hello, World !'} )
     transcript = model.transcribe('test/audio_test_2.mp4')
     assert isinstance(transcript, str)