DefinitelyTyped/types/p-lazy/p-lazy-tests.ts

import PLazy = require('p-lazy');

const lazyPromise = new PLazy<string>((resolve, reject) => {
    if (!true) {
        resolve('foo');
    } else {
        reject(new Error());
    }
});

let str: string;

lazyPromise.then(result => str = result);

Promise.resolve()
    .then(() => lazyPromise)
    .then(value => str = value);

let num: number;
PLazy.from(() => Promise.resolve(1))
    .then(value => num = value);
PLazy.from(() => 1)
    .then(value => num = value);