chore: add create agent engine a2a replay test

tests/unit/agentplatform/genai/replays/test_create_agent_engine_a2a.py

@@ -0,0 +1,87 @@
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# pylint: disable=protected-access,bad-continuation,missing-function-docstring
+
+import contextlib
+import os
+from unittest import mock
+from tests.unit.agentplatform.genai.replays import pytest_helper
+from agentplatform._genai import types
+from agentplatform.agent_engines.templates.a2a import default_a2a_agent
+import pytest
+
+
+pytest.importorskip(
+    "a2a.types", reason="a2a-sdk not installed, skipping A2A Agent tests"
+)
+from a2a.types import AgentInterface
+from a2a.utils.constants import TransportProtocol
+
+
+def test_create_a2a_agent(client, is_replay_mode):
+    my_agent = default_a2a_agent()
+
+    my_agent.agent_card.supported_interfaces.append(
+        AgentInterface(
+            url="http://localhost:8888/",
+            protocol_binding=TransportProtocol.HTTP_JSON,
+            protocol_version="1.0",
+        )
+    )
+
+
+    staging_bucket = os.environ["GCS_BUCKET"]
+
+    # In replay mode, GCS operations are mocked and blob.open("rb") returns a mock
+    # that fails when cloudpickle.load expects bytes. We mock _upload_agent_engine
+    # to skip this verification step, which is not needed when replaying API calls.
+    upload_patch = (
+        mock.patch("agentplatform._genai._agent_engines_utils._upload_agent_engine")
+        if is_replay_mode
+        else contextlib.nullcontext()
+    )
+
+    with upload_patch:
+        agent_engine = client.agent_engines.create(
+            agent=my_agent,
+            config={
+                "staging_bucket": staging_bucket,
+                "display_name": "test-a2a-agent",
+                "http_options": {"api_version": "v1beta1"},
+                "requirements": [
+                    "google-cloud-aiplatform[agent_engines]",
+                    "a2a-sdk",
+                    "sse-starlette",
+                ],
+            },
+        )
+
+
+    assert isinstance(agent_engine, types.AgentEngine)
+    assert agent_engine.api_resource.display_name == "test-a2a-agent"
+
+    # Clean up resources.
+    client.agent_engines.delete(name=agent_engine.api_resource.name, force=True)
+
+
+pytestmark = pytest_helper.setup(
+    file=__file__,
+    globals_for_file=globals(),
+)
+
+pytest_plugins = ("pytest_asyncio",)
+
+
+