examples: add callback unhappy tests

Author: Alex Wang

examples/examples-catalog.json

@@ -444,6 +444,50 @@
         "ExecutionTimeout": 300
       },
       "path": "./src/none_results/none_results.py"
+    },
+    {
+      "name": "Create Callback Failures Uncaught",
+      "description": "Demonstrates callback failure scenarios where the error propagates and is handled by framework",
+      "handler": "callback_failure.handler",
+      "integration": true,
+      "durableConfig": {
+        "RetentionPeriodInDays": 7,
+        "ExecutionTimeout": 300
+      },
+      "path": "./src/callback/callback_failure.py"
+    },
+    {
+      "name": "Create Callback Failures Caught Error",
+      "description": "Demonstrates callback failure scenarios where the error is caught in the code",
+      "handler": "callback_failure.handler",
+      "integration": true,
+      "durableConfig": {
+        "RetentionPeriodInDays": 7,
+        "ExecutionTimeout": 300
+      },
+      "path": "./src/callback/callback_failure.py"
+    },
+    {
+      "name": "Callback With Heartbeat Timeout",
+      "description": "Demonstrates callback timeout scenarios (heartbeat timeout and general timeout)",
+      "handler": "callback_with_timeout.handler",
+      "integration": true,
+      "durableConfig": {
+        "RetentionPeriodInDays": 7,
+        "ExecutionTimeout": 300
+      },
+      "path": "./src/callback/callback_with_timeout.py"
+    },
+    {
+      "name": "Callback With General Timeout",
+      "description": "Demonstrates callback timeout scenarios (heartbeat timeout and general timeout)",
+      "handler": "callback_with_timeout.handler",
+      "integration": true,
+      "durableConfig": {
+        "RetentionPeriodInDays": 7,
+        "ExecutionTimeout": 300
+      },
+      "path": "./src/callback/callback_with_timeout.py"
     }
   ]
 }

examples/src/callback/callback_failure.py

@@ -0,0 +1,35 @@
+"""Demonstrates callback failure scenarios where the error propagates and is handled by framework."""
+
+from typing import Any
+
+from aws_durable_execution_sdk_python.config import CallbackConfig, Duration
+from aws_durable_execution_sdk_python.context import DurableContext
+from aws_durable_execution_sdk_python.execution import durable_execution
+
+
+@durable_execution
+def handler(event: dict[str, Any], context: DurableContext) -> dict[str, Any]:
+    """Handler demonstrating callback failure scenarios."""
+    should_catch_error = event.get("shouldCatchError", False)
+    callback_config = CallbackConfig(timeout=Duration.from_seconds(60))
+
+    if should_catch_error:
+        # Pattern where error is caught and returned in result
+        try:
+            callback = context.create_callback(
+                name="failing-operation",
+                config=callback_config,
+            )
+            return callback.result()
+        except Exception as error:
+            return {
+                "success": False,
+                "error": str(error),
+            }
+    else:
+        # Pattern where error propagates to framework (for basic failure case)
+        callback = context.create_callback(
+            name="failing-operation",
+            config=callback_config,
+        )
+        return callback.result()

examples/src/callback/callback_with_timeout.py

@@ -10,14 +10,18 @@
 
 
 @durable_execution
-def handler(_event: Any, context: DurableContext) -> str:
-    # Callback with custom timeout configuration
-    config = CallbackConfig(
-        timeout=Duration.from_seconds(60), heartbeat_timeout=Duration.from_seconds(30)
-    )
+def handler(event: Any, context: DurableContext) -> str:
+    timeout_type = event.get("timeoutType", "general")
+    if timeout_type == "heartbeat":
+        config = CallbackConfig(
+            timeout=Duration.from_seconds(10),
+            heartbeat_timeout=Duration.from_seconds(1),
+        )
+    else:
+        config = CallbackConfig(timeout=Duration.from_seconds(1))
 
     callback: Callback[str] = context.create_callback(
         name="timeout_callback", config=config
     )
 
-    return f"Callback created with 60s timeout: {callback.callback_id}"
+    return callback.result()

examples/test/callback/test_callback_failure.py

@@ -0,0 +1,64 @@
+"""Tests for create_callback_failures."""
+
+import pytest
+from aws_durable_execution_sdk_python.execution import InvocationStatus
+from aws_durable_execution_sdk_python.lambda_service import ErrorObject
+
+from src.callback import callback_failure
+
+
+@pytest.mark.example
+@pytest.mark.durable_execution(
+    handler=callback_failure.handler,
+    lambda_function_name="Create Callback Failures Uncaught",
+)
+def test_handle_callback_operations_with_failure_uncaught(durable_runner):
+    """Test handling callback operations with failure."""
+    test_payload = {"shouldCatchError": False}
+
+    with durable_runner:
+        execution_arn = durable_runner.run_async(input=test_payload, timeout=30)
+
+        callback_id = durable_runner.wait_for_callback(execution_arn=execution_arn)
+
+        durable_runner.send_callback_failure(
+            callback_id=callback_id,
+            error=ErrorObject.from_message("External API failure"),
+        )
+
+        result = durable_runner.wait_for_result(execution_arn=execution_arn)
+
+    assert result.status is InvocationStatus.FAILED
+
+    error = result.error
+    assert error is not None
+    assert "External API failure" in error.message
+    assert error.type == "CallbackError"
+    assert error.stack_trace is None
+
+
+@pytest.mark.example
+@pytest.mark.durable_execution(
+    handler=callback_failure.handler,
+    lambda_function_name="Create Callback Failures Caught Error",
+)
+def test_handle_callback_operations_with_caught_error(durable_runner):
+    """Test handling callback operations with caught error."""
+    test_payload = {"shouldCatchError": True}
+
+    with durable_runner:
+        execution_arn = durable_runner.run_async(input=test_payload, timeout=30)
+        callback_id = durable_runner.wait_for_callback(execution_arn=execution_arn)
+        durable_runner.send_callback_failure(
+            callback_id=callback_id,
+            error=ErrorObject.from_message("External API failure"),
+        )
+        result = durable_runner.wait_for_result(execution_arn=execution_arn)
+
+    assert result.status is InvocationStatus.SUCCEEDED
+
+    from test.conftest import deserialize_operation_payload
+
+    result_data = deserialize_operation_payload(result.result)
+    assert result_data["success"] is False
+    assert "External API failure" in result_data["error"]

examples/test/callback/test_callback_with_timeout.py

@@ -0,0 +1,46 @@
+"""Tests for callback operation permutations."""
+
+import pytest
+from aws_durable_execution_sdk_python.execution import InvocationStatus
+
+from src.callback import callback_with_timeout
+
+
+@pytest.mark.example
+@pytest.mark.durable_execution(
+    handler=callback_with_timeout.handler,
+    lambda_function_name="Callback With Heartbeat Timeout",
+)
+def test_callback_with_heartbeat_timeout(durable_runner):
+    """Test callback with custom timeout configuration."""
+    test_payload = {"timeoutType": "heartbeat"}
+    with durable_runner:
+        result = durable_runner.run(input=test_payload, timeout=20)
+
+    assert result.status is InvocationStatus.FAILED
+    error = result.error
+    assert error is not None
+    assert error.message == "Callback timed out on heartbeat"
+    assert error.type == "CallbackError"
+    assert error.data is None
+    assert error.stack_trace is None
+
+
+@pytest.mark.example
+@pytest.mark.durable_execution(
+    handler=callback_with_timeout.handler,
+    lambda_function_name="Callback With General Timeout",
+)
+def test_callback_with_general_timeout(durable_runner):
+    """Test callback with custom timeout configuration."""
+    test_payload = {"timeoutType": "general"}
+    with durable_runner:
+        result = durable_runner.run(input=test_payload, timeout=20)
+
+    assert result.status is InvocationStatus.FAILED
+    error = result.error
+    assert error is not None
+    assert error.message == "Callback timed out"
+    assert error.type == "CallbackError"
+    assert error.data is None
+    assert error.stack_trace is None