test: define mobile ext command in unit test instead of functional

Author: KazuCocoa

.github/workflows/functional-test.yml

@@ -105,7 +105,7 @@ jobs:
             name: func_test_android6
           - target: test/functional/android/applications_tests.py
             name: func_test_android7
-          - target: test/functional/android/network_connection_tests.py test/functional/android/log_event_tests.py test/functional/android/activities_tests.py test/functional/android/hw_actions_tests.py
+          - target: test/functional/android/network_connection_tests.py test/functional/android/log_event_tests.py test/functional/android/hw_actions_tests.py
             name: func_test_android8
 
     runs-on: ubuntu-latest

test/functional/android/activities_tests.py

@@ -369,6 +369,29 @@ class CustomAppiumConnection(AppiumConnection):
         assert isinstance(driver.command_executor, CustomAppiumConnection)
 
 
+    @httpretty.activate
+    def test_extention_command_check(self):
+        driver = android_w3c_driver()
+        httpretty.register_uri(
+            httpretty.POST, appium_command('/session/1234567890/execute/sync'), body='{"value": true}'
+        )
+        assert driver.execute_script(
+            'mobile: startActivity',
+            {
+                'component': 'io.appium.android.apis/.accessibility.AccessibilityNodeProviderActivity'
+            }
+        ) is True
+
+        assert {
+            'args': [
+                {
+                    'component': 'io.appium.android.apis/.accessibility.AccessibilityNodeProviderActivity'
+                }
+            ],
+            'script': 'mobile: startActivity'
+        }, get_httpretty_request_body(httpretty.last_request())
+
+
 class SubWebDriver(WebDriver):
     def __init__(self, command_executor, direct_connection=False, options=None):
         super().__init__(