User:Saul/testing

jest/vue-test-utils

This setup was done using Vue 3 so if you are still using Vue 2 commands may differ.

First ensure that Vue is at least version 3.0.6 on your project vue@3.0.6;

Then install the dependancies:

# At the time of writing vue-jest@next resolves to alpha.7 which requires typescript so alpha.8 is specified directly.
npm i -D @vue/test-utils@next jest vue-jest@5.0.0-alpha.8 babel-jest babel-core@bridge

Example test: test/unit/ListItem.spec.js

import { mount } from "@vue/test-utils";
import ListItem from "../../src/components/ListItem.vue";

const wrapperSlots = mount(ListItem, {
	slots: {
		default: "Title",
		icon: "Icon"
	}
});

const wrapper = mount(ListItem);

it("Matches the snapshot.", () => {
	expect(wrapperSlots.html()).toMatchSnapshot();
})

it("Renders the title and icon.", () => {
	expect(wrapperSlots.html()).toContain("Title");
	expect(wrapperSlots.html()).toContain("Icon");
});

it("Renders the icon only when one is present.", () => {
	expect(wrapper.find(".icon").exists()).toBe(false)
	expect(wrapperSlots.find(".icon").exists()).toBe(true)
});

And to run it:

jest tests/unit --coverage # Parameter can be omitted to run it quicker.

Nightwatch

Install

vue add e2e-nightwatch

And to run the tests:

vue-cli-service test:e2e --env firefox # Parameter can be omitted to use chrome.

Supertest

Supertest is a testing framework for testing express apps.

Install:

npm i --save-dev supertest

Your express app should export the server.

A simple test will look something like this:

const request		= require("supertest");
const app	= require("../../server/index.js");

it("should return an error for an invalid session", async done => {
	const res = await app.post("/interaction/invalidsession/state")
		.set('Accept', 'application/json');

	expect(res.statusCode).toEqual(400);
	expect(res).toHaveProperty("text");

	done();
});

If you have a more complicated setup like needing to setup a database first you need to use hooks to ensure everything gets cleaned up:

express.js

// ...
module.exports = async () => {
	// Setup the database first
	await database();

	// express listen
	return app.listen(3000);
}

test.spec.js

const request		= require("supertest");
const expressApp	= require("../../server/index.js");
const sequelize		= require("../../server/sequelize.js");

let app = null;
let server = null;

beforeAll(async done => {
	server = await expressApp();
	app = await request(server);
	done();
});

it("should return an error for an invalid session", async done => {
	const res = await app.post("/interaction/invalidsession/state")
		.set('Accept', 'application/json');

	expect(res.statusCode).toEqual(400);
	expect(res).toHaveProperty("text");

	done();
});

afterAll(async done => {
	// Closing the DB connection allows Jest to exit successfully.
	await server.close();
	await sequelize.close();
	done();
});