Add generic deprecation testing

Author: samanklesaria

src/torchaudio/_internal/module_utils.py

@@ -59,6 +59,7 @@ def wrapped(*args, **kwargs):
 
     return decorator
 
+UNSUPPORTED = []
 
 def deprecated(direction: str, version: Optional[str] = None, remove: bool = False):
     """Decorator to add deprecation message
@@ -90,6 +91,7 @@ def wrapped(*args, **kwargs):
        {direction}
         """
 
+        UNSUPPORTED.append(wrapped)
         return wrapped
 
     return decorator

src/torchaudio/io/__init__.py

@@ -2,7 +2,7 @@
 from torchaudio._internal.module_utils import dropping_support
 
 from ._effector import AudioEffector
-from ._playback import _play_audio
+from ._playback import play_audio as _play_audio
 
 CodecConfig.__init__ = dropping_support(CodecConfig.__init__)
 StreamReader.__init__ = dropping_support(StreamReader.__init__)

test/torchaudio_unittest/deprecation_test.py

@@ -0,0 +1,12 @@
+from torchaudio_unittest.common_utils import PytorchTestCase
+from torchaudio._internal.module_utils import UNSUPPORTED
+
+
+class TestDeprecations(PytorchTestCase):
+    def test_deprecations(self):
+        for func in UNSUPPORTED:
+            with self.assertWarnsRegex(UserWarning, r"deprecated"):
+                try:
+                    func()
+                except:
+                    pass