test_read_files.py : Improved tests to be more robust to random chang…

…es of reading sequence on GitHub runners.

tests/test_read_files.py

@@ -1,7 +1,7 @@
 """Tests reading files."""
 
 from pathlib import Path
-from typing import List
+from typing import List, Set, Union
 
 from trafficgen.read_files import (
     read_encounter_settings_file,
@@ -99,20 +99,20 @@ def test_read_situations_one_to_many_situations(situations_folder_test_05: Path)
     assert len(situations) == 3
 
     # sourcery skip: no-loop-in-tests
+    num_situations_values_found: Set[Union[int, None]] = set()
     for situation in situations:
         assert situation.own_ship is not None
         assert situation.target_ship is None
         assert situation.encounter is not None
         assert len(situation.encounter) in {1, 2, 3}
+        num_situations_values_found.add(situation.num_situations)
         for encounter in situation.encounter:
             assert encounter.desired_encounter_type is not None
             assert encounter.beta is None
             assert encounter.relative_speed is None
             assert encounter.vector_time is None
 
-    assert situations[0].num_situations == 6
-    assert situations[1].num_situations == 3
-    assert situations[2].num_situations is None
+    assert num_situations_values_found == {6, 3, None}
 
 
 def test_read_situations_with_different_encounter_types(situations_folder_test_07: Path):
@@ -123,28 +123,27 @@ def test_read_situations_with_different_encounter_types(situations_folder_test_0
     assert len(situations) == 5
 
     # sourcery skip: no-loop-in-tests
+    desired_encounter_types_found: Set[EncounterType] = set()
     for situation in situations:
         assert situation.own_ship is not None
         assert situation.target_ship is None
         assert situation.num_situations is None
         assert situation.encounter is not None
         assert len(situation.encounter) == 1
+        desired_encounter_types_found.add(situation.encounter[0].desired_encounter_type)
         for encounter in situation.encounter:
             assert encounter.desired_encounter_type is not None
             assert encounter.beta is not None
             assert encounter.relative_speed is None
             assert encounter.vector_time is None
 
-    assert situations[0].encounter is not None
-    assert situations[0].encounter[0].desired_encounter_type is EncounterType.HEAD_ON
-    assert situations[1].encounter is not None
-    assert situations[1].encounter[0].desired_encounter_type is EncounterType.OVERTAKING_GIVE_WAY
-    assert situations[2].encounter is not None
-    assert situations[2].encounter[0].desired_encounter_type is EncounterType.OVERTAKING_STAND_ON
-    assert situations[3].encounter is not None
-    assert situations[3].encounter[0].desired_encounter_type is EncounterType.CROSSING_GIVE_WAY
-    assert situations[4].encounter is not None
-    assert situations[4].encounter[0].desired_encounter_type is EncounterType.CROSSING_STAND_ON
+    assert desired_encounter_types_found == {
+        EncounterType.HEAD_ON,
+        EncounterType.OVERTAKING_GIVE_WAY,
+        EncounterType.OVERTAKING_STAND_ON,
+        EncounterType.CROSSING_GIVE_WAY,
+        EncounterType.CROSSING_STAND_ON,
+    }
 
 
 def test_read_own_ship(own_ship_file: Path):
@@ -166,17 +165,17 @@ def test_read_target_ships(target_ships_folder: Path):
     assert len(target_ships) == 3
 
     # sourcery skip: no-loop-in-tests
+    ship_types_found: Set[ShipType] = set()
     for target_ship in target_ships:
         assert target_ship.static is not None
+        ship_types_found.add(target_ship.static.ship_type)
         assert target_ship.start_pose is None
         assert target_ship.waypoints is None
 
-    assert target_ships[0].static is not None
-    assert target_ships[0].static.ship_type is ShipType.PASSENGER_RORO
-    assert target_ships[1].static is not None
-    assert target_ships[1].static.ship_type is ShipType.GENERAL_CARGO
-    assert target_ships[2].static is not None
-    assert target_ships[2].static.ship_type is ShipType.PASSENGER_RORO
+    assert ship_types_found == {
+        ShipType.PASSENGER_RORO,
+        ShipType.GENERAL_CARGO,
+    }
 
 
 def test_read_encounter_settings_file(settings_file: Path):