chore: Make UT of a2a consistent about how tests should be skipped when python verison < 3.10

PiperOrigin-RevId: 801040421

tests/unittests/a2a/converters/test_event_converter.py

@@ -49,34 +49,10 @@ try:
   from google.adk.events.event_actions import EventActions
 except ImportError as e:
   if sys.version_info < (3, 10):
-    # Create dummy classes to prevent NameError during test collection
-    # Tests will be skipped anyway due to pytestmark
-    class DummyTypes:
-      pass
-
-    DataPart = DummyTypes()
-    Message = DummyTypes()
-    Role = DummyTypes()
-    Task = DummyTypes()
-    TaskState = DummyTypes()
-    TaskStatusUpdateEvent = DummyTypes()
-    _create_artifact_id = lambda *args: None
-    _create_error_status_event = lambda *args: None
-    _create_status_update_event = lambda *args: None
-    _get_adk_metadata_key = lambda *args: None
-    _get_context_metadata = lambda *args: None
-    _process_long_running_tool = lambda *args: None
-    _serialize_metadata_value = lambda *args: None
-    ADK_METADATA_KEY_PREFIX = "adk_"
-    ARTIFACT_ID_SEPARATOR = "_"
-    convert_event_to_a2a_events = lambda *args: None
-    convert_event_to_a2a_message = lambda *args: None
-    convert_a2a_task_to_event = lambda *args: None
-    DEFAULT_ERROR_MESSAGE = "error"
-    InvocationContext = DummyTypes()
-    Event = DummyTypes()
-    EventActions = DummyTypes()
-    types = DummyTypes()
+    # Imports are not needed since tests will be skipped due to pytestmark.
+    # The imported names are only used within test methods, not at module level,
+    # so no NameError occurs during module compilation.
+    pass
   else:
     raise e
 

tests/unittests/a2a/converters/test_part_converter.py

@@ -38,21 +38,10 @@ try:
   from google.genai import types as genai_types
 except ImportError as e:
   if sys.version_info < (3, 10):
-    # Create dummy classes to prevent NameError during test collection
-    # Tests will be skipped anyway due to pytestmark
-    class DummyTypes:
-      pass
-
-    a2a_types = DummyTypes()
-    genai_types = DummyTypes()
-    A2A_DATA_PART_METADATA_TYPE_FUNCTION_CALL = "function_call"
-    A2A_DATA_PART_METADATA_TYPE_FUNCTION_RESPONSE = "function_response"
-    A2A_DATA_PART_METADATA_TYPE_CODE_EXECUTION_RESULT = "code_execution_result"
-    A2A_DATA_PART_METADATA_TYPE_EXECUTABLE_CODE = "executable_code"
-    A2A_DATA_PART_METADATA_TYPE_KEY = "type"
-    convert_a2a_part_to_genai_part = lambda x: None
-    convert_genai_part_to_a2a_part = lambda x: None
-    _get_adk_metadata_key = lambda x: f"adk_{x}"
+    # Imports are not needed since tests will be skipped due to pytestmark.
+    # The imported names are only used within test methods, not at module level,
+    # so no NameError occurs during module compilation.
+    pass
   else:
     raise e
 

tests/unittests/a2a/converters/test_request_converter.py

@@ -20,7 +20,7 @@ import pytest
 
 # Skip all tests in this module if Python version is less than 3.10
 pytestmark = pytest.mark.skipif(
-    sys.version_info < (3, 10), reason="A2A tool requires Python 3.10+"
+    sys.version_info < (3, 10), reason="A2A requires Python 3.10+"
 )
 
 # Import dependencies with version checking
@@ -32,17 +32,10 @@ try:
   from google.genai import types as genai_types
 except ImportError as e:
   if sys.version_info < (3, 10):
-    # Create dummy classes to prevent NameError during test collection
-    # Tests will be skipped anyway due to pytestmark
-    class DummyTypes:
-      pass
-
-    a2a_types = DummyTypes()
-    genai_types = DummyTypes()
-    RequestContext = DummyTypes()
-    RunConfig = DummyTypes()
-    _get_user_id = lambda x: None
-    convert_a2a_request_to_adk_run_args = lambda x: None
+    # Imports are not needed since tests will be skipped due to pytestmark.
+    # The imported names are only used within test methods, not at module level,
+    # so no NameError occurs during module compilation.
+    pass
   else:
     raise e
 

tests/unittests/a2a/converters/test_utils.py

@@ -21,12 +21,21 @@ pytestmark = pytest.mark.skipif(
     sys.version_info < (3, 10), reason="A2A requires Python 3.10+"
 )
 
-from google.adk.a2a.converters.utils import _from_a2a_context_id
-from google.adk.a2a.converters.utils import _get_adk_metadata_key
-from google.adk.a2a.converters.utils import _to_a2a_context_id
-from google.adk.a2a.converters.utils import ADK_CONTEXT_ID_PREFIX
-from google.adk.a2a.converters.utils import ADK_METADATA_KEY_PREFIX
-import pytest
+# Import dependencies with version checking
+try:
+  from google.adk.a2a.converters.utils import _from_a2a_context_id
+  from google.adk.a2a.converters.utils import _get_adk_metadata_key
+  from google.adk.a2a.converters.utils import _to_a2a_context_id
+  from google.adk.a2a.converters.utils import ADK_CONTEXT_ID_PREFIX
+  from google.adk.a2a.converters.utils import ADK_METADATA_KEY_PREFIX
+except ImportError as e:
+  if sys.version_info < (3, 10):
+    # Imports are not needed since tests will be skipped due to pytestmark.
+    # The imported names are only used within test methods, not at module level,
+    # so no NameError occurs during module compilation.
+    pass
+  else:
+    raise e
 
 
 class TestUtilsFunctions: