jest-sequelize
Drop in for mocking sequelize models
Install
npm install @efi.shtain/jest-sequelize
Usage
Best way to use this module is through a jest.setup file.
- In your jest config, add a sequelize-mock.js file to the setupFilesAfterEnv array (You can use an existing file if you already have one)
- Paste the following lines to the top of the file:
jest.mock("./models", () => {
const path = require("path");
const jestSequelize = require("@efi.shtain/jest-sequelize");
const modelsPath = path.join(process.cwd(), "./models");
return jestSequelize(modelsPath);
});
module.exports = async () => {};- All set! Happy jesting!
Test Example
// Import the relevant models
const { User } = require("./models");
describe("users service", () => {
describe("find all", () => {
it("should return empty array on find all", async () => {
// Prepare
const find = jest
.spyOn(User, "find") // You can spy on any method provided
.mockResolvedValue(Promise.resolve([])); // mock return value
// Execute
const users = await service.findAll(); // assuming service is under test
// Assert
expect(find).toBeCalled();
expect(users).toEqual([]);
});
})
})