flush-promises

 

Flush all pending resolved promise handlers. Useful in tests.

example with async/await

``js
const flushPromises = require('flush-promises');

test('flushPromises', async () => {
let a;
let b;

Promise.resolve().then(() => {
a = 1;
}).then(() => {
b = 2;
})

await flushPromises();

expect(a).toBe(1);
expect(b).toBe(2);
});
`

TypeScript

`ts
import * as flushPromises from "flush-promises";

test("flushPromises", async () => {
let a;
let b;

Promise.resolve().then(() => {
a = 1;
}).then(() => {
b = 2;
});

await flushPromises();

expect(a).toBe(1);
expect(b).toBe(2);
});
``