Creating trpc context (express server) for testing without req and res objects.

export async function createContext({req,res}: trpcExpress.CreateExpressContextOptions) {
    return {req, res};
}

export type Context = inferAsyncReturnType<typeof createContext>;

export const t = initTRPC.context<Context>().create({
    transformer: superjson,
});

export const isAuthedMiddleware = t.middleware(async ({ctx, next}) => {
    const {req, res,} = ctx;

    const token: string | undefined = req.headers.authorization?.split(" ")[1];
    if (!token) {
        throw new TRPCError({code: "UNAUTHORIZED"});
    }
    // my internal check function
    if (await authCheckFunction(token) === null) {
        throw new TRPCError({
            code: "UNAUTHORIZED",
        });
    }
    const {
        userId,
        sessionId, role
    } = await anotherAuthCheckFunction(token, email);
    return next({
        ctx: {
            userEmail: email,
            userId,
            role
        },
    });

});