FactoryJS

The object generator for testing.

Documentation・Contributing Guide

• ✅ Type Safety - It helps prevent configuration errors and typos.
• ⚙️ Highly Functional - You can define variables, traits, and properties that depend on other properties.
• 🪶 Lightweight - It is very lightweight as it does not depend on any other packages.
• 📦 ORM-Friendly API - Designed to be used also with ORMs like Prisma and Drizzle.

1. Install FactoryJS.

pnpm add -D @factory-js/factory

2. Define a factory and use it in your tests, database seeds, etc.

import { factory } from "@factory-js/factory";

// Define the factory
const userFactory = factory.define({
  props: {
    firstName: () => "John",
    lastName: () => "Doe",
    role: () => "guest",
  },
  vars: {},
});

describe("when a user is admin", () => {
  it("returns true", async () => {
    const user = await userFactory(db)
      .props({ role: () => "admin" }) // Override role to admin
      .build();
    expect(isAdmin(user)).toBe(true);
  });
});

To learn more about FactoryJS, check the Documentation.

MIT