added tempfile dependency for better file handling in tests

added demo of `set_speed_set_for_train_type`

python/altrios/demos/set_speed_train_sim_demo.py

@@ -17,7 +17,7 @@
     cars_empty=50,
     cars_loaded=50,
     rail_vehicle_type="Manifest",
-    train_type=alt.TrainType.Freight,
+    train_type=None,
     train_length_meters=None,
     train_mass_kilograms=None,
 )
@@ -66,6 +66,7 @@
 
 network = alt.Network.from_file(
     alt.resources_root() / "networks/Taconite.yaml")
+network.set_speed_set_for_train_type(alt.TrainType.Freight)
 link_path = alt.LinkPath.from_csv_file(
     alt.resources_root() / "demo_data/link_points_idx.csv"
 )

rust/altrios-core/Cargo.toml

@@ -47,6 +47,7 @@ serde-this-or-that = "0.4.2"
 project-root = "0.2.2"
 eng_fmt = { workspace = true }
 directories = "5.0.1"
+tempfile = "3.10.1"
 
 [features]
 pyo3 = ["dep:pyo3"]

rust/altrios-core/src/track/link/link_impl.rs

@@ -608,9 +608,11 @@ mod tests {
     fn test_to_and_from_file_for_links() {
         // TODO: make use of `tempfile` or similar crate
         let links = Vec::<Link>::valid();
-        links.to_file("links_test2.yaml").unwrap();
-        assert_eq!(Vec::<Link>::from_file("links_test2.yaml").unwrap(), links);
-        std::fs::remove_file("links_test2.yaml").unwrap();
+        let tempdir = tempfile::tempdir().unwrap();
+        let temp_file_path = tempdir.path().join("links_test2.yaml");
+        links.to_file(temp_file_path.clone()).unwrap();
+        assert_eq!(Vec::<Link>::from_file(temp_file_path).unwrap(), links);
+        tempdir.close().unwrap();
     }
 
     #[test]