Vitest gives no output - unit-testing

I'm new to testing and im trying to write some unit tests for my Vue app. The problem is that vitest givesno output and I cant figure out what is wrong. Any help would be apriciated.
describe('UserForm', () => {
it('renders component properly', async () => {
const viewId = "123"
render(UserForm, {
props: {
open: true
}
})
const view = await screen.findByText('Kontrahent')
expect(view.id).toBe(viewId)
})
})
I run the test with this command
vitest --environment jsdom

Have you tried to do something like:
import { mount } from "#vue/test-utils";
// in the describe
const wrapper = mount(Login, {
props: {
open: true
},
});
it("mounts the component", () => {
expect(wrapper.html()).toContain("Kontrahent");
});

Related

React Testing, using axios-mock-adapter

I need to switch out my backend in-memory DB for testing due to memory issues. Below is my code
import { fireEvent, render, screen, waitFor } from "#testing-library/react";
import userEvent from "#testing-library/user-event";
import App from "App";
import axios from "axios";
import MockAdapter from "axios-mock-adapter";
import { AccessLevel, ResponseApi, SystemUserApi } from "types";
let mock: MockAdapter;
beforeAll(() => {
mock = new MockAdapter(axios);
});
afterEach(() => {
mock.reset();
});
beforeEach(() => {
jest.resetModules();
});
describe("<App />", () => {
test("login", async () => {
mock.onPost('/Hello').reply(200, getPost);
const result = render(<App />);
const user = userEvent.setup();
const btnLogin = screen.getByText(/Login/i) as HTMLButtonElement;
await userEvent.click(btnLogin);
let btnOk = screen.queryByText(/OK/i) as HTMLButtonElement;
expect(btnOk.disabled).toBe(true);
let btnCancel = screen.getByText(/Cancel/i) as HTMLButtonElement;
expect(btnCancel.disabled).toBe(false);
fireEvent.change(screen.getByLabelText(/Access Code/i) as HTMLInputElement, { target: { value: 'USER' } });
expect(btnOk.disabled).toBe(false);
await userEvent.click(btnOk);
//At this point I was expecting the onPost to be clicked
});
});
function getPost(config: any): any {
console.log(config);
debugger;
return {
data: {
access_code: 'USER'.toUpperCase(),
access_level: AccessLevel.USER ,
lock_level:true
} as SystemUserApi,
error: false,
} as ResponseApi
}
Deep down in the is a call axios post to /Hello but my function within the test is not called. I do not know if it has to do with the actual call being axios.request vs axios.post. I have tried switching to mock.onAny, but that did not seem to work. Not sure what to do here.

vitest failed to mock quasar

I am having vue3 app with vite and vitest and trying to mock the Quasar useQuasar composable which I am using in my custom Composable like:
// useLoginRequestBuilder.ts
import { makeUserAuthentication } from "#/main/factories"
import { useQuasar } from "quasar"
export function useLoginRequestBuilder() {
const $q = useQuasar()
async function login() {
try {
$q.loading.show()
const auth = makeUserAuthentication()
return await auth.signinRedirect()
} catch (e) {
console.log(e)
$q.loading.hide()
$q.notify({
color: "red-4",
textColor: "white",
icon: "o_warning",
message: "Login Failed!",
})
}
}
return {
login,
}
}
and I am trying to mock quasar in tests like:
// useLoginRequestBuilder.spec.ts
import { useLoginRequestBuilder } from "#/main/builders"
vi.mock("quasar", () => ({ // <--- this is not really mocking quasar
useQuasar: () => ({
loading: {
show: () => true,
hide: () => true,
},
}),
}))
const spyAuth = vi.fn(() => Promise.resolve(true))
vi.mock("#/main/factories", () => ({
makeUserAuthentication: () => ({
signinRedirect: () => spyAuth(),
}),
}))
describe("test useLoginRequestBuilder", () => {
test("should call signinRedirect", async () => {
const { login } = useLoginRequestBuilder()
const sut = await login()
expect(sut).toBe(true)
})
})
vi.mock("quasar"... is failing to mock quasar and I am getting below error. That means, it failed to mock and failed to get the $q.loading.... object.
TypeError: Cannot read properties of undefined (reading 'loading')
I understand that there is a separate testing lib for quasar, here but I think this is not really the case here.
Bordering on a necro-post, but I had a similar issue that the mocking factory wasn't creating the plugins being used in non-Vue components, and had to mock each call individually in the end.
Though I'd add it here for anyone else
vitest.mock("quasar", () => vi.fn()); // this doesn't mock out calls
// use individual mocks as below
import { Loading } from "quasar";
vi.spyOn(Loading, "show").mockImplementation(() => vi.fn());
vi.spyOn(Loading, "hide").mockImplementation(() => vi.fn());

Testing that a method is called when component is mounted

I'm trying to test that a method gets called when a component is mounted but it keeps failing with
Expected mock function to have been called one time, but it was called zero times.
Here is the component:
<template>
<b-form-input
class="mr-2 rounded-0"
placeholder="Enter Search term..."
id="input-keyword"
/>
</template>
<script>
export default {
name: 'job-search-test',
methods: {
async searchJobs () {
console.log('Calling Search Jobs from JobsSearchTest')
}
},
mounted () {
this.searchJobs()
}
}
</script>
Here is the test:
import { shallowMount, createLocalVue } from '#vue/test-utils'
import BootstrapVue from 'bootstrap-vue'
import JobSearchTest from '#/components/jobs/JobSearchTest'
const localVue = createLocalVue()
localVue.use(BootstrapVue)
describe('JobsSearchTest.vue', () => {
it('should call searchJobs method when component is mounted', () => {
const methods = {
searchJobs: jest.fn()
}
shallowMount(JobSearchTest, {
mocks: {
methods
},
localVue })
expect(methods.searchJobs).toHaveBeenCalledTimes(1)
})
})
However, the following test passes
import { shallowMount, createLocalVue } from '#vue/test-utils'
import BootstrapVue from 'bootstrap-vue'
import JobSearchTest from '#/components/jobs/JobSearchTest'
const localVue = createLocalVue()
localVue.use(BootstrapVue)
describe('JobsSearchTest.vue', () => {
it('should call searchJobs method when component is mounted', () => {
let searchJobs = jest.fn()
shallowMount(JobSearchTest, {
methods: {
searchJobs
},
localVue })
expect(searchJobs).toHaveBeenCalledTimes(1)
})
})
According to Testing VueJs Applications by Edd Yerburgh one tests a function by stubbing it with a Jest mock the following way
it('should call $bar.start on load', () => {
const $bar = {
start: jest.fn(),
finish: () => {}
}
shallowMount(ItemList, { mocks: $bar })
expect($bar.start).toHaveBeenCalledTimes(1)
})
In my eyes, this is essentially what I am doing in the first test, which fails.
Any help with why this could be happening will be appreciated.
mocks option mocks instance properties. mocks: { methods } assumes that there's methods property in Vue component. Since this.methods.searchJobs() isn't called, the test fails.
It's searchJobs method, the test should be as the working snippet shows:
shallowMount(JobSearchTest, {
methods: {
searchJobs
},
localVue })

How can I pass a boolean to an expect statement for testing using mocha/chai?

Using Vue CLI I have a unit test that I am trying to check for a true/false that looks like this:
describe('The thing', () => {
it('must be available.', () => {
const available = true
const wrapper = shallowMount(MyVueComponent, {
propsData: { available },
})
expect(wrapper).to.be.true
})
})
When I run npm run test:unit
I get the following:
AssertionError: expected { Object (isFunctionalComponent, _emitted, ...) } to be true
If I just check the value of available, then it's all good. But that seems like I'm doing it wrong.
Other tests I have written are working fine as I am checking for a text value:
describe('The thing', () => {
it('should have a name.', () => {
const name = 'Hal'
const wrapper = shallowMount(MyVueComponent, {
propsData: { name },
})
expect(wrapper.text()).to.include(name)
})
})
I am not sure how to check that the available is a boolean and it must be true. Any suggestions would be appreciated!
EDIT
This is what my Vue component looks like:
export default {
name: 'MyVueComponent',
props: {
name: String
},
data: function() {
return {
available: true,
}
},
}
EDIT 2
This seems to work in my unit test:
describe('The thing', () => {
it('must be available.', () => {
const available = true
const wrapper = shallowMount(MyVueComponent, {
propsData: { available },
})
expect(wrapper.vm.available).to.be.true
})
})
However, it is looking at my actual component in my /src directory. If I change the data values from true to false my tests come out correctly. I'm not sure how to have the data stay at the test level. So if I were to change const available = false, my test should fail--but it does not.
EDIT 3
It seems like this works (to access the data object):
describe("The thing", () => {
it("must be available.", () => {
const defaultData = MyVueComponent.data();
// const wrapper = shallowMount(MyVueComponent, {});
expect(defaultData.available).to.be.true;
});
});
But it still seems not right that I'm referencing my actual code, and not sticking within the unit tests.
You want to check the received prop, which you can do with wrapper.props()
describe('The thing', () => {
it('must be available.', () => {
const available = true
const wrapper = shallowMount(MyVueComponent, {
propsData: { available },
})
expect(wrapper.props().available).to.be.true
// or:
// expect(wrapper.props().available).to.equal(available)
})
})
Chai's .to.be.true and .to.equal use === so there is no need to separately check that it is indeed a Boolean, but if you prefer the "expressiveness" of it, you can check it too:
expect(wrapper.props().available).to.be.a('boolean')

How to unit test VueJS watcher on $route

I'm testing a Single file component that uses vue router to watch $route. The problem is that I can't get the test to both change the route and trigger the watcher's function.
The test file:
import { createLocalVue, shallow } from 'vue-test-utils';
import Vue from 'vue';
import Vuex from 'vuex';
const localVue = createLocalVue();
localVue.use(Vuex);
const $route = {
path: '/my/path',
query: { uuid: 'abc' },
}
wrapper = shallow({
localVue,
store,
mocks: {
$route,
}
});
it('should call action when route changes', () => {
// ensure jest has a clean state for this mocked func
expect(actions['myVuexAction']).not.toHaveBeenCalled();
vm.$set($route.query, 'uuid', 'def');
//vm.$router.replace(/my/path?uuid=def') // tried when installing actual router
//vm.$route.query.uuid = 'def'; // tried
//vm.$route = { query: { uuid: 'def'} }; // tried
expect(actions['myVuexAction']).toHaveBeenLastCalledWith({ key: true });
});
My watch method in the SFC:
watch: {
$route() {
this.myVuexAction({ key: true });
},
},
How do you mock router in such a way that you can watch it and test the watch method is working as you expect?
This is how I'm testing a watch on route change that adds the current route name as a css class to my app component:
import VueRouter from 'vue-router'
import { shallowMount, createLocalVue } from '#vue/test-utils'
import MyApp from './MyApp'
describe('MyApp', () => {
it('adds current route name to css classes on route change', () => {
// arrange
const localVue = createLocalVue()
localVue.use(VueRouter)
const router = new VueRouter({ routes: [{path: '/my-new-route', name: 'my-new-route'}] })
const wrapper = shallowMount(MyApp, { localVue, router })
// act
router.push({ name: 'my-new-route' })
// assert
expect(wrapper.find('.my-app').classes()).toContain('my-new-route')
})
})
Tested with vue#2.6.11 and vue-router#3.1.3.
I checked how VueRouter initializes $route and $router and replicated this in my test. The following works without using VueRouter directly:
const localVue = createLocalVue();
// Mock $route
const $routeWrapper = {
$route: null,
};
localVue.util.defineReactive($routeWrapper, '$route', {
params: {
step,
},
});
Object.defineProperty(localVue.prototype, '$route', {
get() { return $routeWrapper.$route; },
});
// Mock $router
const $routerPushStub = sinon.stub();
localVue.prototype.$router = { push: $routerPushStub };
const wrapper = shallowMount(TestComponent, {
localVue,
});
Updating $route should always be done by replacing the whole object, that is the only way it works without using a deep watcher on $route and is also the way VueRouter behaves:
$routeWrapper.$route = { params: { step: 1 } };
await vm.wrapper.$nextTick();
Source: install.js
Its working for me
let $route = {
name: 'any-route',
};
We defined a $route and we called like
wrapper = mount(YourComponent, {
mocks: {
$route,
},
});
and my componente is like this
#Watch('$route', { deep: true, immediate: true, })
async onRouteChange(val: Route) {
if (val.name === 'my-route') {
await this.getDocumentByUrl();
await this.allDocuments();
}
};
pd: I use typescript, but this work with the another format
and finally my test
it('my test', ()=>{
const getDocumentByUrl = jest.spyOn(wrapper.vm, 'getDocumentByUrl');
const allDocuments = jest.spyOn(wrapper.vm, 'allDocuments');
wrapper.vm.$route.name = 'my-route';
await flushPromises();
expect(getDocumentByUrl).toHaveBeenCalled();
expect(allDocuments).toHaveBeenCalled();
})
The way to do this actually is to use vue-test-utils wrapper method, setData.
wrapper.setData({ $route: { query: { uuid: 'def'} } });