style: format Python files with Ruff

main.py

@@ -30,6 +30,7 @@ class todocreate(BaseModel):
 
         return value
 
+
 class todoupdate(BaseModel):
     completion: bool | None = None
     task: str | None = Field(
@@ -52,12 +53,11 @@ class todoupdate(BaseModel):
     @model_validator(mode="after")
     def at_least_one_field_must_be_provided(self) -> Self:
         if self.task is None and self.completion is None:
-            raise ValueError(
+            raise ValueError("task or completion must be provided")
-                "task or completion must be provided"
-            )
 
         return self
 
+
 class todoresponse(BaseModel):
     id: int
     task: str

tests/fakes.py

@@ -10,6 +10,7 @@ class FakeScalarResult:
     def all(self) -> list[Todo]:
         return self.todos
 
+
 class FakeSession:
     def __init__(self) -> None:
         self.todo_to_return: Todo | None = None

tests/test_todocreate.py

@@ -8,19 +8,23 @@ def test_todocreate_requires_task() -> None:
     with pytest.raises(ValidationError):
         todocreate()
 
+
 def test_todocreate_accepts_valid_task() -> None:
     todo_data = todocreate(task="学习测试单元")
 
     assert todo_data.task == "学习测试单元"
 
+
 def test_todocreate_rejects_empty_task() -> None:
     with pytest.raises(ValidationError):
         todocreate(task="")
 
+
 def test_todocreate_rejects_blank_task() -> None:
     with pytest.raises(ValidationError):
         todocreate(task="   ")
 
+
 def test_todocreate_rejects_task_longer_than_200_characters() -> None:
     long_task = "a" * 201
 

tests/test_todos_api.py

@@ -25,6 +25,7 @@ def test_create_todo_rejects_invalid_task(
 
     assert response.status_code == 422
 
+
 def test_create_todo_rejects_missing_task(
     client: TestClient,
 ) -> None:
@@ -40,6 +41,7 @@ def test_create_todo_rejects_missing_task(
     assert error["loc"] == ["body", "task"]
     assert error["type"] == "missing"
 
+
 def test_create_todo_success(
     client: TestClient,
     fake_session: FakeSession,
@@ -58,6 +60,7 @@ def test_create_todo_success(
     assert fake_session.committed is True
     assert fake_session.added_todo.task == "学习单元测试"
 
+
 def test_patch_missing_todo_returns_404(
     client: TestClient,
     fake_session: FakeSession,
@@ -76,6 +79,7 @@ def test_patch_missing_todo_returns_404(
     assert fake_session.committed is False
     assert fake_session.rolled_back is False
 
+
 def test_patch_existing_todo_updates_task(
     client: TestClient,
     fake_session: FakeSession,
@@ -100,6 +104,7 @@ def test_patch_existing_todo_updates_task(
     assert fake_session.committed is True
     assert fake_session.todo_to_return.task == "新任务"
 
+
 def test_patch_existing_todo_updates_completion_only(
     client: TestClient,
     fake_session: FakeSession,
@@ -125,6 +130,7 @@ def test_patch_existing_todo_updates_completion_only(
     assert fake_session.todo_to_return.task == "保留原任务"
     assert fake_session.todo_to_return.completion is True
 
+
 def test_delete_existing_todo_success(
     client: TestClient,
     fake_session: FakeSession,
@@ -147,6 +153,7 @@ def test_delete_existing_todo_success(
     assert fake_session.committed is True
     assert fake_session.deleted_todo is existing_todo
 
+
 def test_delete_missing_todo_returns_404(
     client: TestClient,
     fake_session: FakeSession,
@@ -161,6 +168,7 @@ def test_delete_missing_todo_returns_404(
     assert fake_session.deleted_todo is None
     assert fake_session.committed is False
 
+
 def test_create_todo_rolls_back_when_commit_fails(
     client: TestClient,
     fake_session: FakeSession,
@@ -176,6 +184,7 @@ def test_create_todo_rolls_back_when_commit_fails(
     assert fake_session.rolled_back is True
     assert fake_session.committed is False
 
+
 def test_patch_todo_rolls_back_when_commit_fails(
     client: TestClient,
     fake_session: FakeSession,
@@ -196,6 +205,7 @@ def test_patch_todo_rolls_back_when_commit_fails(
     assert fake_session.rolled_back is True
     assert fake_session.committed is False
 
+
 def test_delete_todo_rolls_back_when_commit_fails(
     client: TestClient,
     fake_session: FakeSession,
@@ -215,6 +225,7 @@ def test_delete_todo_rolls_back_when_commit_fails(
     assert fake_session.rolled_back is True
     assert fake_session.committed is False
 
+
 def test_get_todos_returns_todo_list(
     client: TestClient,
     fake_session: FakeSession,
@@ -248,6 +259,7 @@ def test_get_todos_returns_todo_list(
         },
     ]
 
+
 def test_get_todos_returns_empty_list(
     client: TestClient,
     fake_session: FakeSession,
@@ -259,6 +271,7 @@ def test_get_todos_returns_empty_list(
     assert response.status_code == 200
     assert response.json() == []
 
+
 @pytest.mark.parametrize(
     "invalid_task",
     [
@@ -285,6 +298,7 @@ def test_patch_todo_rejects_invalid_task(
 
     assert response.status_code == 422
 
+
 def test_patch_todo_rejects_empty_body(
     client: TestClient,
     fake_session: FakeSession,
@@ -303,6 +317,7 @@ def test_patch_todo_rejects_empty_body(
     assert response.status_code == 422
     assert fake_session.committed is False
 
+
 def test_patch_todo_accepts_completion_false(
     client: TestClient,
     fake_session: FakeSession,
@@ -323,6 +338,7 @@ def test_patch_todo_accepts_completion_false(
     assert response.json()["completion"] is False
     assert fake_session.committed is True
 
+
 def test_patch_todo_updates_task_and_completion(
     client: TestClient,
     fake_session: FakeSession,

tests/test_todoupdate.py

@@ -8,6 +8,7 @@ def test_todoupdate_rejects_empty_update() -> None:
     with pytest.raises(ValidationError):
         todoupdate()
 
+
 def test_todoupdate_accepts_provided_value() -> None:
     update_data = todoupdate(
         task="学习测试单元",
@@ -16,6 +17,7 @@ def test_todoupdate_accepts_provided_value() -> None:
 
     assert update_data.task == "学习测试单元"
 
+
 def test_todoupdate_accepts_task_only() -> None:
     update_data = todoupdate(task="修改后的任务")