Edits to test documentation (Azure#16179)

* swathis suggestions

* Update doc/dev/tests.md

Co-authored-by: swathipil <76007337+swathipil@users.noreply.github.com>

Co-authored-by: swathipil <76007337+swathipil@users.noreply.github.com>

doc/dev/mgmt/tests.md

@@ -35,13 +35,13 @@ sdk/storage/azure-mgmt-storage> pytest
 
 You can provide directories or individual files as positional arguments to specify particular tests to run rather than running the entire test suite. For example:
 ```Shell
-sdk/storage/azure-mgmt-storage> pytest sdk/storage/azure-mgmt-storage/
-sdk/storage/azure-mgmt-storage> pytest sdk/storage/azure-mgmt-storage/tests/test_mgmt_storage.py
+sdk/storage/azure-mgmt-storage> pytest
+sdk/storage/azure-mgmt-storage> pytest tests/test_mgmt_storage.py
 ```
 
 If you have print statements in your tests for debugging you can add the `-s` flag to send those print statements to standard output:
 ```Shell
-sdk/storage/azure-mgmt-storage> pytest sdk/storage/azure-mgmt-storage/ -s
+sdk/storage/azure-mgmt-storage> pytest -s
 ```
 
 ## Getting Azure credentials
@@ -106,6 +106,7 @@ def get_credentials(**kwargs):
 ```python
 def get_azure_core_credentials(**kwargs):
     from azure.identity import ClientSecretCredential
+    import os
     return ClientSecretCredential(
         client_id = os.environ['AZURE_CLIENT_ID'],
         client_secret = os.environ['AZURE_CLIENT_SECRET'],

doc/dev/tests.md

@@ -84,6 +84,12 @@ azure-sdk-for-python\sdk\my-directory\my-library> pytest
 azure-sdk-for-python\sdk\my-directory\my-library> pytest <test_file.py>
 ```
 
+If your tests are broken up into multiple folders for organization, you can run specific folders:
+```cmd
+azure-sdk-for-python\sdk\my-directory\my-library> pytest .\tests\async_tests\
+azure-sdk-for-python\sdk\my-directory\my-library> pytest .\tests\async_tests\<test_file.py>
+```
+
 In addition you can provide keywords to run specific tests within the suite or within a specific file
 ```cmd
 azure-sdk-for-python\sdk\my-directory\my-library> pytest -k <keyword>
@@ -293,4 +299,4 @@ For more information, refer to the [advanced tests notes][advanced_tests_notes]
 [azure_devtools]: https://pypi.org/project/azure-devtools/
 [engsys_wiki]: https://dev.azure.com/azure-sdk/internal/_wiki/wikis/internal.wiki/48/Create-a-new-Live-Test-pipeline?anchor=test-resources.json
 [mgmt_settings_fake]: https://github.com/Azure/azure-sdk-for-python/blob/master/tools/azure-sdk-tools/devtools_testutils/mgmt_settings_fake.py
-[packaging]: ./packaging.md
+[packaging]: ./packaging.md