Class CountingRoute

tests/middleware/test_opentelemetry.py:287–292

    _, exporter = tracer_provider

    class CountingRoute(Route):
        match_count = 0

        def matches(self, scope: Scope) -> tuple[Match, Scope]:
            self.match_count += 1
            return super().matches(scope)

    route = CountingRoute("/users/{username}", homepage)
    app = Starlette(routes=[route], middleware=[Middleware(OpenTelemetryMiddleware)])