enable pyre-strict lint rule in test_update_generic_hook.py (#2389)

Summary:
Pull Request resolved: #2389

enable pyre-strict lint rule and silence the type errors that arise from doing so

Reviewed By: joe1234wu

Differential Revision: D53432969

fbshipit-source-id: a419d9632b2fc171d91dba2d5909fca796429e2c

fbpcs/common/tests/entity/test_update_generic_hook.py

@@ -3,7 +3,7 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
-# pyer-strict
+# pyre-strict
 
 import unittest
 from dataclasses import dataclass, field
@@ -14,13 +14,15 @@
 from fbpcs.common.entity.update_generic_hook import UpdateGenericHook
 
 
+# pyre-fixme[3]: Return type must be annotated.
 def after_update_input(obj: "DummyInstance"):
     obj.output_path = obj.input_path + ":output"
     obj.storage = obj.input_path + ":storage"
 
 
 # create a hook obj
 # update output_path and storage in one hook when input_path is changed
+# pyre-fixme[24]: Generic type `UpdateGenericHook` expects 1 type parameter.
 input_updated_hook: UpdateGenericHook = UpdateGenericHook(after_update_input)