prisma-mock

import createPrismaMock from "prisma-mock/client"; import { Prisma } from "./generated/client"; // Adjust path based on your Prisma client generation import * as dmmf from "./generated/dmmf"; // Ensure DMMF generator is configured and run let client: ReturnType<typeof createPrismaMock>; beforeEach(() => { // Initialize the mock client before each test client = createPrismaMock(Prisma, { datamodel: dmmf, // Optionally start with some initial data data: { user: [ { id: 1, name: 'Initial User', email: 'initial@example.com' } ] } }); // Clear any state from previous tests client.$clear(); }); describe('User operations', () => { it('should create a new user', async () => { const newUser = await client.user.create({ data: { id: 2, name: 'Alice Smith', email: 'alice@example.com', }, }); expect(newUser).toEqual({ id: 2, name: 'Alice Smith', email: 'alice@example.com' }); const userCount = await client.user.count(); expect(userCount).toBe(2); // Includes initial user }); it('should find a user by ID', async () => { // Create a user specifically for this test if not pre-seeded await client.user.create({ data: { id: 3, name: 'Bob Johnson', email: 'bob@example.com' } }); const foundUser = await client.user.findUnique({ where: { id: 3 } }); expect(foundUser?.name).toBe('Bob Johnson'); }); it('should update an existing user', async () => { const updatedUser = await client.user.update({ where: { id: 1 }, data: { name: 'Updated Initial User' }, }); expect(updatedUser?.name).toBe('Updated Initial User'); }); });