Refactor testing functions to use correct naming scheme

[Chris Mullins (cleemullins)]

Fixes #163

A half dozen methods started with "test" that were not intended to be actual tests. PyTest tries to run these and generates warnings as their return types are not correct. This results in PyTest warnings that look like:

tests/hosting_core/_oauth/test_oauth_flow.py::testing_Activity
  D:\git\Agents-for-python\venv\Lib\site-packages\_pytest\python.py:161: PytestReturnNotNoneWarning: Test functions should return None, but tests/hosting_core/_oauth/test_oauth_flow.py::testing_Activity returned <class 'microsoft_agents.activity.activity.Activity'>.
...

Pytest picks up any function/class that starts with "test" as an actual test. The easiest fix for these is to simply rename them to NOT start with test. All functions encoutered as part of this are actually creating Mocks or similar testing entities for use by other tests.

[Copilot]

Pull Request Overview

This PR refactors function names in test files to prevent PyTest from incorrectly identifying them as test cases. Functions that previously started with "test" but were utility functions for creating test objects are renamed to start with "create_" instead.

• Renamed utility functions from testing_* to create_testing_* pattern
• Updated all references to use the new naming scheme
• Removed extraneous blank lines for cleaner formatting

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/hosting_core/app/_oauth/_common.py	Renamed utility functions testing_Activity, testing_TurnContext, and testing_TurnContext_magic to use create_ prefix
tests/hosting_core/app/_oauth/test_authorization.py	Updated imports and references to use new function names
tests/hosting_core/app/_oauth/_handlers/test_user_authorization.py	Updated function definition and reference to use new naming scheme
tests/hosting_core/app/_oauth/_handlers/test_agentic_user_authorization.py	Updated import and reference to use new function names
tests/hosting_core/_oauth/test_oauth_flow.py	Updated function definition and reference to use new naming scheme

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