chore: agent engine httpbody fix

PiperOrigin-RevId: 770119037

Author: sararob

tests/unit/vertexai/genai/test_agent_engines.py

@@ -0,0 +1,44 @@
+# Copyright 2025 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
+
+import importlib
+from unittest import mock
+
+from google.cloud import aiplatform
+import vertexai
+from google.cloud.aiplatform import initializer as aiplatform_initializer
+from vertexai import _genai
+
+import pytest
+
+_TEST_PROJECT = "test-project"
+_TEST_LOCATION = "us-central1"
+
+
+pytestmark = pytest.mark.usefixtures("google_auth_mock")
+
+
+class TestAgentEngines:
+    """Unit tests for the Agent Engines client."""
+
+    def setup_method(self):
+        importlib.reload(aiplatform_initializer)
+        importlib.reload(aiplatform)
+        importlib.reload(vertexai)
+        vertexai.init(
+            project=_TEST_PROJECT,
+            location=_TEST_LOCATION,
+        )

vertexai/_genai/_transformers.py

@@ -14,3 +14,7 @@
 #
 
 """Transformers module for Vertex addons."""
+
+from google.genai import _transformers as genai_transformers
+
+t_bytes = genai_transformers.t_bytes