Flaky durable tests (Azure#1385)

* timeout in durable tests * lint * close request object * increased timeout, retries * removed setup for durable, no constant for debug * global var * added method to testutils * refactoring * fixes for durable only * flake issues * http setting issue * formatting * reformatting * merge miss * removed patch env, removing env var after test * only remove from cls dict * super setupclass * actually setting env var --------- Co-authored-by: gavin-aguiar <80794152+gavin-aguiar@users.noreply.github.com>

Author: hallvictoria

tests/endtoend/test_durable_functions.py

@@ -4,7 +4,6 @@
 import os
 import time
 from unittest import skipIf
-from unittest.mock import patch
 
 import requests
 
@@ -20,31 +19,28 @@ class TestDurableFunctions(testutils.WebHostTestCase):
 
  @classmethod
  def setUpClass(cls):
- cls.env_variables['WEBSITE_HOSTNAME'] = "http:"
- os_environ = os.environ.copy()
- os_environ.update(cls.env_variables)
-
- cls._patch_environ = patch.dict('os.environ', os_environ)
- cls._patch_environ.start()
+ os.environ["WEBSITE_HOSTNAME"] = "http:"
  super().setUpClass()
 
  @classmethod
  def tearDownClass(cls):
+ # Remove the WEBSITE_HOSTNAME environment variable
+ os.environ.pop('WEBSITE_HOSTNAME')
  super().tearDownClass()
- cls._patch_environ.stop()
-
- @classmethod
- def get_libraries_to_install(cls):
- return ['azure-functions-durable']
 
  @classmethod
  def get_environment_variables(cls):
  return cls.env_variables
 
+ @classmethod
+ def get_libraries_to_install(cls):
+ return ['azure-functions-durable']
+
  @classmethod
  def get_script_dir(cls):
  return testutils.E2E_TESTS_FOLDER / 'durable_functions'
 
+ @testutils.retryable_test(3, 5)
  def test_durable(self):
  r = self.webhost.request('GET',
  'orchestrators/DurableFunctionsOrchestrator')