From 9e4ce1ea0f0ad8b113443aa9fc01712e8b6a815b Mon Sep 17 00:00:00 2001
From: Gustav Bylund <gustav.bylund@sick.se>
Date: Wed, 19 Feb 2025 22:22:49 +0100
Subject: [PATCH] test(dependency_cache): add test for repeated parsing

---
 tests/test_dependency_cache.py | 40 +++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/tests/test_dependency_cache.py b/tests/test_dependency_cache.py
index 08fb9b74f..cda3ec7b9 100644
--- a/tests/test_dependency_cache.py
+++ b/tests/test_dependency_cache.py
@@ -1,9 +1,27 @@
 from fastapi import Depends, FastAPI, Security
+from fastapi._compat import PYDANTIC_V2
 from fastapi.testclient import TestClient
+from pydantic import BaseModel
 
 app = FastAPI()
 
-counter_holder = {"counter": 0}
+counter_holder = {"counter": 0, "parsing_counter": 0}
+
+if PYDANTIC_V2:
+    from pydantic import model_validator
+
+    decorator = model_validator(mode="before")
+else:
+    from pydantic import root_validator
+
+    decorator = root_validator
+
+
+class Model(BaseModel):
+    @decorator
+    def __validate__(cls, _):
+        counter_holder["parsing_counter"] += 1
+        return {}
 
 
 async def dep_counter():
@@ -15,6 +33,10 @@ async def super_dep(count: int = Depends(dep_counter)):
     return count
 
 
+async def model_dep(model: Model) -> Model:
+    return model
+
+
 @app.get("/counter/")
 async def get_counter(count: int = Depends(dep_counter)):
     return {"counter": count}
@@ -35,6 +57,15 @@ async def get_sub_counter_no_cache(
     return {"counter": count, "subcounter": subcount}
 
 
+@app.post("/sub-model-parsing/")
+async def get_double_model_parsing(
+    a: Model = Depends(model_dep),
+    b: Model = Depends(model_dep),
+):
+    assert a is b
+    return {"parsing_counter": counter_holder["parsing_counter"]}
+
+
 @app.get("/scope-counter")
 async def get_scope_counter(
     count: int = Security(dep_counter),
@@ -81,6 +112,13 @@ def test_sub_counter_no_cache():
     assert response.json() == {"counter": 4, "subcounter": 3}
 
 
+def test_sub_model_parsing_no_repeatable_parsing():
+    counter_holder["parsing_counter"] = 0
+    response = client.post("/sub-model-parsing/", json={})
+    assert response.status_code == 200, response.text
+    assert response.json() == {"parsing_counter": 1}
+
+
 def test_security_cache():
     counter_holder["counter"] = 0
     response = client.get("/scope-counter/")