tests: avoid failing if fast_rolling_stock already exists

tests/conftest.py

@@ -1,6 +1,6 @@
 import json
 from pathlib import Path
-from typing import Any, Iterable, List
+from typing import Any, Iterable, List, Optional
 
 import pytest
 import requests
@@ -80,13 +80,36 @@ def small_scenario(small_infra: Infra, foo_project_id: int, foo_study_id: int) -
     yield Scenario(foo_project_id, foo_study_id, scenario_id, small_infra.id, timetable_id)
 
 
-def _create_fast_rolling_stocks(test_rolling_stocks: List[TestRollingStock] = None):
+def get_rolling_stock(editoast_url: str, rolling_stock_name: str) -> int:
+    """
+    Returns the ID corresponding to the rolling stock name, if available.
+    :param editoast_url: Api url
+    :param rolling_stock_name: name of the rolling stock
+    :return: ID the rolling stock
+    """
+    page = 1
+    while page is not None:
+        # TODO: feel free to reduce page_size when https://github.com/osrd-project/osrd/issues/5350 is fixed
+        r = requests.get(editoast_url + "light_rolling_stock/", params={"page": page, "page_size": 1_000})
+        if r.status_code // 100 != 2:
+            raise RuntimeError(f"Rolling stock error {r.status_code}: {r.content}")
+        rjson = r.json()
+        for rolling_stock in rjson["results"]:
+            if rolling_stock["name"] == rolling_stock_name:
+                return rolling_stock["id"]
+        page = rjson.get("next")
+    raise ValueError(f"Unable to find rolling stock {rolling_stock_name}")
+
+
+def create_fast_rolling_stocks(test_rolling_stocks: Optional[List[TestRollingStock]] = None):
     if test_rolling_stocks is None:
         payload = json.loads(FAST_ROLLING_STOCK_JSON_PATH.read_text())
-        response = requests.post(f"{EDITOAST_URL}rolling_stock/", json=payload).json()
-        # TODO: if the fast_rolling_stock already exists, we should probably fetch it
-        assert "id" in response, f"Failed to create rolling stock: {response}"
-        return [response["id"]]
+        response = requests.post(f"{EDITOAST_URL}rolling_stock/", json=payload)
+        rjson = response.json()
+        if response.status_code // 100 == 4 and "NameAlreadyUsed" in rjson["type"]:
+            return [get_rolling_stock(EDITOAST_URL, rjson["context"]["name"])]
+        assert "id" in rjson, f"Failed to create rolling stock: {rjson}"
+        return [rjson["id"]]
     ids = []
     for rs in test_rolling_stocks:
         payload = json.loads(rs.base_path.read_text())
@@ -98,15 +121,15 @@ def _create_fast_rolling_stocks(test_rolling_stocks: List[TestRollingStock] = No
 
 @pytest.fixture
 def fast_rolling_stocks(request: Any) -> Iterable[int]:
-    ids = _create_fast_rolling_stocks(request.node.get_closest_marker("names_and_metadata").args[0])
+    ids = create_fast_rolling_stocks(request.node.get_closest_marker("names_and_metadata").args[0])
     yield ids
     for id in ids:
         requests.delete(f"{EDITOAST_URL}rolling_stock/{id}?force=true")
 
 
 @pytest.fixture
 def fast_rolling_stock() -> int:
-    id = _create_fast_rolling_stocks()[0]
+    id = create_fast_rolling_stocks()[0]
     yield id
     requests.delete(f"{EDITOAST_URL}rolling_stock/{id}?force=true")
 

tests/fuzzer/fuzzer.py

@@ -12,6 +12,9 @@
 import requests
 from requests import Response, Timeout
 
+# TODO: we may want to use more qualified imports
+import conftest
+
 TIMEOUT = 15
 # TODO: since infra ids are not stable, we may want to change to an infra name
 INFRA_ID = 1
@@ -303,18 +306,7 @@ def get_rolling_stock(editoast_url: str, rolling_stock_name: str) -> int:
     :param rolling_stock_name: name of the rolling stock
     :return: ID the rolling stock
     """
-    page = 1
-    while page is not None:
-        # TODO: feel free to reduce page_size when https://github.com/osrd-project/osrd/issues/5350 is fixed
-        r = get_with_timeout(editoast_url + "light_rolling_stock/", params={"page": page, "page_size": 1_000})
-        if r.status_code // 100 != 2:
-            raise RuntimeError(f"Rolling stock error {r.status_code}: {r.content}")
-        rjson = r.json()
-        for rolling_stock in rjson["results"]:
-            if rolling_stock["name"] == rolling_stock_name:
-                return rolling_stock["id"]
-        page = rjson.get("next")
-    raise ValueError(f"Unable to find rolling stock {rolling_stock_name}")
+    return conftest.get_rolling_stock(editoast_url, rolling_stock_name)
 
 
 def get_random_rolling_stock(editoast_url: str) -> int:
@@ -675,21 +667,13 @@ def get_infra_name(editoast_url: str, infra_id: int):
     return r.json()["name"]
 
 
-# TODO: duplicated in tests/conftest.py
-def create_fast_rolling_stock():
-    path = Path(__file__).parents[2] / "editoast" / "src" / "tests" / "example_rolling_stock_1.json"
-    payload = json.loads(path.read_text())
-    response = requests.post(f"{EDITOAST_URL}rolling_stock/", json=payload).json()
-    assert "id" in response, f"Failed to create rolling stock: {response}"
-
-
 if __name__ == "__main__":
     new_scenario = create_scenario(EDITOAST_URL, INFRA_ID)
     if ROLLING_STOCK_NAME == "fast_rolling_stock":
         try:
             get_rolling_stock(EDITOAST_URL, ROLLING_STOCK_NAME)
         except ValueError:
-            create_fast_rolling_stock()
+            conftest.create_fast_rolling_stocks(test_rolling_stocks=None)
     run(
         EDITOAST_URL,
         new_scenario,