Fix data provider retrieval for permutation tests

Author: MDUYN

investing_algorithm_framework/app/app.py

@@ -1325,9 +1325,10 @@ def run_permutation_test(
 
         for data_source in data_sources:
             if DataType.OHLCV.equals(data_source.data_type):
+                data_provider = data_provider_service.get(data_source)
                 data = data_provider_service.get_data(
                     data_source=data_source,
-                    start_date=backtest_date_range.start_date,
+                    start_date=data_provider._start_date_data_source,
                     end_date=backtest_date_range.end_date
                 )
                 original_data_combinations.append((data_source, data))

investing_algorithm_framework/services/data_providers/data_provider_service.py

@@ -322,6 +322,19 @@ def __init__(
         self.configuration_service = configuration_service
         self.market_credential_service = market_credential_service
 
+    def get(self, data_source: DataSource) -> Optional[DataProvider]:
+        """
+        Get a registered data provider by its data source.
+
+        Args:
+            data_source (DataSource): The data source to get the data provider for.
+
+        Returns:
+            Optional[DataProvider]: The registered data provider for
+              the data source, or None if not found.
+        """
+        return self.data_provider_index.get(data_source)
+
     def get_data(
         self,
         data_source: DataSource,
@@ -742,6 +755,15 @@ def get_data_files(self):
 
         return data_files
 
+    def get_all_registered_data_providers(self) -> List[DataProvider]:
+        """
+        Function to get all registered data providers.
+
+        Returns:
+            List[DataProvider]: A list of all registered data providers.
+        """
+        return self.data_provider_index.get_all()
+
     def reset(self):
         """
         Function to reset all the data providers and the data provider