Inject a dependency (service locator pattern).
// app.ts
import { inject } from 'njct';
const fs = inject('fs', () => require('fs'));
fs.readFileSync('data.json');
// app.spec.ts
import { injector } from 'njct';
injector.provide('fs', () => ({
readFileSync: () => 'result of call of fs.readFileSync()',
}));class Car {
static count = 0;
constructor() {
Car.count++;
}
}
let vehicle = inject(Car);
vehicle = inject(Car);
expect(vehicle).toBeA(Car);
expect(Car.count).toEqual(1);MIT License (c) 2022