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Introduction

In a nutshell

This library aims to reduce boilerplate 😎 and provides high-level tools️ 🔥 for testing Component, Service, Interceptor and everything else related to the Angular mechanism.

It makes tests easier to read 😌 and faster to write ⚡️!

Quick examples

Testing Component

describe('AppComponent', () => {
const tb = componentTestBed(AppComponent) // 🛠️ Create the test bed which is re-compiled for each test
.inject('prefs', Preferences); // 🖇️ Link a key to an injection for all tests, see below 👇

it('should render title', tb(({ component, query }) => { // 🔋 Access enhanced tools for testing components
expect(component.title).toEqual('app-v17');
const span = query.findElement('.content span');
expect(span.textContent).toContain('app-v17 app is running!');
}));

it('should update preferences on click', tb(({ action, injected: { prefs } }) => { // 🤯 Retrieve injections by autocompletion
expect(prefs.approved).toBeFalse();
action.click('#my-button');
expect(prefs.approved).toBeTrue();
}));
});

🫡 (The redundant "should create" test is even called up for you!)

Testing Service

describe('AppService', () => {
const tb = serviceTestBed(AppService, { httpTesting: true }); // 🛠️ Create the test bed and enable http testing

it('should fetch cat fact', tb(({ service, http, rx }, done) => {
const mockBody = { fact: 'string', length: 6 };

rx.remind = service.getCatFact().subscribe({ // 🧯 Use rx.remind to auto unsubscribe after the end of the test
next: (res) => {
expect(res).toEqual(mockBody);
done();
},
});

http.emitSuccessResponse({ url: service.CAT_FACT_URL, body: mockBody }); // 🎭 Fake the http response of the request that matches the url
}));
});