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PiperOrigin-RevId: 748777998

tests/integration/fixture/callback_agent/__init__.py

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+# 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.
+
+from . import agent

tests/integration/fixture/callback_agent/agent.py

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+# 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.
+
+from typing import Optional
+
+from google.adk import Agent
+from google.adk.agents.callback_context import CallbackContext
+from google.adk.agents.invocation_context import InvocationContext
+from google.adk.models import LlmRequest
+from google.adk.models import LlmResponse
+from google.genai import types
+
+
+def before_agent_call_end_invocation(
+    callback_context: CallbackContext,
+) -> types.Content:
+  return types.Content(
+      role='model',
+      parts=[types.Part(text='End invocation event before agent call.')],
+  )
+
+
+def before_agent_call(
+    invocation_context: InvocationContext,
+) -> types.Content:
+  return types.Content(
+      role='model',
+      parts=[types.Part.from_text(text='Plain text event before agent call.')],
+  )
+
+
+def before_model_call_end_invocation(
+    callback_context: CallbackContext, llm_request: LlmRequest
+) -> LlmResponse:
+  return LlmResponse(
+      content=types.Content(
+          role='model',
+          parts=[
+              types.Part.from_text(
+                  text='End invocation event before model call.'
+              )
+          ],
+      )
+  )
+
+
+def before_model_call(
+    invocation_context: InvocationContext, request: LlmRequest
+) -> LlmResponse:
+  request.config.system_instruction = 'Just return 999 as response.'
+  return LlmResponse(
+      content=types.Content(
+          role='model',
+          parts=[
+              types.Part.from_text(
+                  text='Update request event before model call.'
+              )
+          ],
+      )
+  )
+
+
+def after_model_call(
+    callback_context: CallbackContext,
+    llm_response: LlmResponse,
+) -> Optional[LlmResponse]:
+  content = llm_response.content
+  if not content or not content.parts or not content.parts[0].text:
+    return
+
+  content.parts[0].text += 'Update response event after model call.'
+  return llm_response
+
+
+before_agent_callback_agent = Agent(
+    model='gemini-1.5-flash',
+    name='before_agent_callback_agent',
+    instruction='echo 1',
+    before_agent_callback=before_agent_call_end_invocation,
+)
+
+before_model_callback_agent = Agent(
+    model='gemini-1.5-flash',
+    name='before_model_callback_agent',
+    instruction='echo 2',
+    before_model_callback=before_model_call_end_invocation,
+)
+
+after_model_callback_agent = Agent(
+    model='gemini-1.5-flash',
+    name='after_model_callback_agent',
+    instruction='Say hello',
+    after_model_callback=after_model_call,
+)