TestClient is not triggering on_startup events or on_shutdown events

Is your feature related to a problem? Please describe.

TestClient provides interface to make requests to Starlette app. What I expect is that also on_startup events and on_shutdown events are triggered when invoking TestClient. I want to test incoming requests that depend on the on_startup functions being called by Starlette app.

Describe the solution you would like.

with TestClient(app) as client:
    # on_startup functions called
    client.get('/')
    # on_shutdown functions called

or at least on_startup is called in this code snippet:

from starlette.applications import Starlette
from starlette.testclient import TestClient

app = Starlette(
    debug=True,
    on_startup=[lambda: print('Startup')],
    on_shutdown=[lambda: print('Shutdown')],
)

client = TestClient(app)

Describe alternatives you considered

I require on_startup async functions to be called for database initialization (Postgres Engine) and in this scenario I can’t use TestClient anymore

[Kolumbs]

I am sorry after reading more closely the code of TestClient there is already implementation of what I need:

with TestClient(app) as client:
    client.request("GET", "/")

this will do the startup and shutdown events

[Kludex]

I think it should mention the information about the lifespan events