Remove NoPathBetweenNodes from get_all_paths

Author: IrenaDk

src/power_grid_model_ds/_core/model/graphs/models/base.py

@@ -245,9 +245,6 @@ def get_all_paths(self, ext_start_node_id: int, ext_end_node_id: int) -> list[li
             target=self.external_to_internal(ext_end_node_id),
         )
 
-        if internal_paths == []:
-            raise NoPathBetweenNodes(f"No path between nodes {ext_start_node_id} and {ext_end_node_id}")
-
         return [self._internals_to_externals(path) for path in internal_paths]
 
     def get_components(self, substation_nodes: NDArray[np.int32]) -> list[list[int]]:

tests/unit/model/graphs/test_graph_model.py

@@ -225,8 +225,9 @@ def test_all_paths_on_circular_network(self, graph_with_5_nodes: BaseGraphModel)
         assert [1, 5, 4, 3] in paths
 
     def test_all_paths_no_path(self, graph_with_5_nodes: BaseGraphModel):
-        with pytest.raises(NoPathBetweenNodes):
-            graph_with_5_nodes.get_all_paths(1, 2)
+        path = graph_with_5_nodes.get_all_paths(1, 2)
+
+        assert path == []
 
 
 class TestFindFundamentalCycles: