fix: throw ResourceNotFound when execution doesnt exist in filesystem store (#65)

Author: bchampp

src/aws_durable_execution_sdk_python_testing/stores/filesystem.py

@@ -8,7 +8,7 @@
 from pathlib import Path
 
 from aws_durable_execution_sdk_python_testing.exceptions import (
-    DurableFunctionsLocalRunnerError,
+    ResourceNotFoundException,
 )
 from aws_durable_execution_sdk_python_testing.execution import Execution
 
@@ -74,7 +74,7 @@ def load(self, execution_arn: str) -> Execution:
         file_path = self._get_file_path(execution_arn)
         if not file_path.exists():
             msg = f"Execution {execution_arn} not found"
-            raise DurableFunctionsLocalRunnerError(msg)
+            raise ResourceNotFoundException(msg)
 
         with open(file_path, encoding="utf-8") as f:
             data = json.load(f, object_hook=datetime_object_hook)

tests/stores/filesystem_store_test.py

@@ -6,7 +6,7 @@
 import pytest
 
 from aws_durable_execution_sdk_python_testing.exceptions import (
-    DurableFunctionsLocalRunnerError,
+    ResourceNotFoundException,
 )
 from aws_durable_execution_sdk_python_testing.execution import Execution
 from aws_durable_execution_sdk_python_testing.model import StartDurableExecutionInput
@@ -64,9 +64,9 @@ def test_filesystem_execution_store_save_and_load(store, sample_execution):
 
 
 def test_filesystem_execution_store_load_nonexistent(store):
-    """Test loading a nonexistent execution raises DurableFunctionsLocalRunnerError."""
+    """Test loading a nonexistent execution raises ResourceNotFoundException."""
     with pytest.raises(
-        DurableFunctionsLocalRunnerError, match="Execution nonexistent-arn not found"
+        ResourceNotFoundException, match="Execution nonexistent-arn not found"
     ):
         store.load("nonexistent-arn")