Merge branch 'release/0.2.1'

Author: s3rius

README.md

@@ -314,3 +314,35 @@ async def my_handler(var: str = Depends(Path())):
     return web.json_response({"var": var})
 
 ```
+
+
+## Overridiing dependencies
+
+Sometimes for tests you don't want to calculate actual functions
+and you want to pass another functions instead.
+
+To do so, you can add "dependency_overrides" key to the aplication.
+It's a dict that is passed as additional context to dependency resolvers.
+
+Here's an example.
+
+```python
+def original_dep() -> int:
+    return 1
+
+class MyView(View):
+    async def get(self, num: int = Depends(original_dep)):
+        """Nothing."""
+        return web.json_response({"request": num})
+```
+
+Imagine you have a handler that depends on some function,
+but instead of `1` you want to have `2` in your tests.
+
+To do it, jsut add `dependency_overrides` somewhere,
+where you create your application. And make sure that keys
+of that dict are actual function that are being replaced.
+
+```python
+    my_app["dependency_overrides"] = {original_dep: 2}
+```

aiohttp_deps/initializer.py

@@ -44,6 +44,7 @@ async def __call__(self, request: web.Request) -> web.StreamResponse:
             {
                 web.Request: request,
                 web.Application: request.app,
+                **request.app.get("dependency_overrides", {}),
             },
         ) as resolver:
             return await self.original_handler(**(await resolver.resolve_kwargs()))

aiohttp_deps/view.py

@@ -43,6 +43,7 @@ async def _iter(self) -> StreamResponse:
             {
                 web.Request: self.request,
                 web.Application: self.request.app,
+                **self.request.app.get("dependency_overrides", {}),
             },
         ) as ctx:
             return await method(**(await ctx.resolve_kwargs()))  # type: ignore

pyproject.toml

@@ -3,7 +3,7 @@ name = "aiohttp-deps"
 description = "Dependency injection for AioHTTP"
 authors = ["Taskiq team <taskiq@no-reply.com>"]
 maintainers = ["Taskiq team <taskiq@no-reply.com>"]
-version = "0.2.0"
+version = "0.2.1"
 readme = "README.md"
 license = "LICENSE"
 classifiers = [

tests/test_func_dependencies.py

@@ -35,3 +35,23 @@ async def handler(app: web.Application = Depends()):
     resp = await client.get("/")
     assert resp.status == 200
     assert "Application" in (await resp.json())["request"]
+
+
+@pytest.mark.anyio
+async def test_dependency_override(
+    my_app: web.Application,
+    aiohttp_client: ClientGenerator,
+):
+    def original_dep() -> int:
+        return 1
+
+    async def handler(num: int = Depends(original_dep)):
+        return web.json_response({"request": num})
+
+    my_app.router.add_get("/", handler)
+    my_app["dependency_overrides"] = {original_dep: 2}
+
+    client = await aiohttp_client(my_app)
+    resp = await client.get("/")
+    assert resp.status == 200
+    assert (await resp.json())["request"] == 2

tests/test_view_dependencies.py

@@ -53,3 +53,25 @@ async def get(self):
     client = await aiohttp_client(my_app)
     resp = await client.delete("/")
     assert resp.status == 405
+
+
+@pytest.mark.anyio
+async def test_dependency_override(
+    my_app: web.Application,
+    aiohttp_client: ClientGenerator,
+):
+    def original_dep() -> int:
+        return 1
+
+    class MyView(View):
+        async def get(self, num: int = Depends(original_dep)):
+            """Nothing."""
+            return web.json_response({"request": num})
+
+    my_app.router.add_view("/", MyView)
+    my_app["dependency_overrides"] = {original_dep: 2}
+
+    client = await aiohttp_client(my_app)
+    resp = await client.get("/")
+    assert resp.status == 200
+    assert (await resp.json())["request"] == 2