Made a start on issue to test optional

tests/test_optional_dependencies.py

@@ -0,0 +1,36 @@
+# test_optional_dependencies.py
+import importlib
+import sys
+import pytest
+
+# List of optional dependencies and their corresponding TTS classes from tts_wrapper
+optional_dependencies = {
+    "boto3": ("tts_wrapper", "PollyTTS", "PollyClient"),
+    "ibm_watson": ("tts_wrapper", "WatsonTTS", "WatsonClient"),
+    "google_cloud_texttospeech": ("tts_wrapper", "GoogleTTS", "GoogleClient"),
+    "pyttsx3": ("tts_wrapper", "SapiTTS", "SapiClient"),
+    "azure_cognitiveservices_speech": ("tts_wrapper", "MicrosoftTTS", "MicrosoftClient"),
+    "requests": ("tts_wrapper", "ElevenLabsTTS", "ElevenLabsClient"),
+}
+
+@pytest.mark.parametrize("module_name, tts_wrapper, tts_class, client_class", optional_dependencies.items())
+def test_optional_dependencies(module_name, tts_wrapper, tts_class, client_class):
+    # Temporarily remove the module from sys.modules
+    original_module = sys.modules.pop(module_name, None)
+
+    try:
+        # Attempt to import the TTS and Client classes without the optional dependency
+        tts_module = importlib.import_module(tts_wrapper)
+        tts_cls = getattr(tts_module, tts_class)
+        client_cls = getattr(tts_module, client_class)
+    except (ModuleNotFoundError, AttributeError):
+        # If the import fails, it should be due to the missing optional dependency
+        assert module_name not in sys.modules
+    else:
+        # If the import succeeds, ensure the classes are indeed available
+        assert tts_cls is not None
+        assert client_cls is not None
+    finally:
+        # Restore the original module if it was removed
+        if original_module:
+            sys.modules[module_name] = original_module