Theo's Typesafe Cult•16mo ago

Anybody got a vitest with T3-app setup?

I'm trying to setup vitest tests with my trpc routes, but after following the official t3 docs (https://create.t3.gg/en/usage/trpc/#sample-integration-test), and the official prisma guide on how to mock the db (https://www.prisma.io/blog/testing-series-1-8eRB5p0Y8o), I am running into the issue of (it seems like) my models not being created. TypeError: Cannot read properties of undefined (reading 'create') Does anybody have any projects that have this setup and working? Been picking my brain on this for a few hours and can't understand why my prisma mock isn't working as expected.

1 Reply

Xaohs•16mo ago

This is my mock directly taken from the prisma docs

import { type PrismaClient } from '@prisma/client';
import { beforeEach } from 'vitest';
import { mockDeep, mockReset } from 'vitest-mock-extended';

beforeEach(() => {
    mockReset(prisma);
});

const prisma = mockDeep<PrismaClient>();
export default prisma;

import { type PrismaClient } from '@prisma/client';
import { beforeEach } from 'vitest';
import { mockDeep, mockReset } from 'vitest-mock-extended';

beforeEach(() => {
    mockReset(prisma);
});

const prisma = mockDeep<PrismaClient>();
export default prisma;

And this is the (test) test i'm trying to execute.

 beforeEach(() => {
        vi.restoreAllMocks();
    });

    const newUser = {
        id: '1',
        emailVerified: new Date(),
        image: null,
        email: '[email protected]',
        name: 'Prisma Fan',
    };
    prisma.user.create.mockResolvedValue({
        ...newUser,
    });
    const createUser = async (user: typeof newUser) => {
        return await prisma.user.create({
            data: user,
        });
    };

    const user = await createUser(newUser);
    expect(user).toStrictEqual({ ...newUser, id: 1 });

 beforeEach(() => {
        vi.restoreAllMocks();
    });

    const newUser = {
        id: '1',
        emailVerified: new Date(),
        image: null,
        email: '[email protected]',
        name: 'Prisma Fan',
    };
    prisma.user.create.mockResolvedValue({
        ...newUser,
    });
    const createUser = async (user: typeof newUser) => {
        return await prisma.user.create({
            data: user,
        });
    };

    const user = await createUser(newUser);
    expect(user).toStrictEqual({ ...newUser, id: 1 });

This is very barebones, as this doesn't use TRPC yet, when adding this prisma mock to the innerContext, and calling a trpc route, I get the same create error. But I want this example to be simple for now.

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Anybody got a vitest with T3-app setup?