Theo's Typesafe CultTTC
Theo's Typesafe Cult•2y ago
alimcg1

Jest test for tRPC route

Hi guys,
I have been using Jest to test tRPC routes in a project like this:

import { expect, it } from "@jest/globals";
import { inferProcedureInput } from "@trpc/server";
import { prisma } from "../../../../server/db";
import { AppRouter, appRouter } from "../../root";

it("tests the example hello router", async () => {
  const caller = appRouter.createCaller({ session: null, prisma: prisma });

  type Input = inferProcedureInput<AppRouter["example"]["hello"]>;

  const input: Input = {
    text: "test",
  };

  const result = await caller.example.hello(input);

  expect(result).toStrictEqual({ greeting: "Hello test"})
});


With "@trpc/server": "^10.9.0"
  • everything works as expected.
owever in a new project using the t-3 App router from npm create t3-app@latest which has "@trpc/server": "^10.43.6",:
'createCaller' is deprecated.ts(6385)

The types file for router.d.ts say to use t.createCallerFactory(router) instead and links to the docs: https://trpc.io/docs/server/server-side-calls

But I am struggling to make this work within the t-3 set up.

Has anyone else had this problem? Or any suggestions on how to fix it/ work around it?

Thanks
Server Side Calls | tRPC
You may need to call your procedure(s) directly from the same server they're hosted in, createCallerFactory() can be used to achieve this. This is useful for server-side calls and for integration testing of your tRPC procedures.
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