git.r.bdr.sh - rbdr/forum/blob - src/utils/resolve_after.test.js

   1 import { resolveAfter } from './resolve_after';
   2
   3 describe('Resolve After', () => {
   4
   5   test('it should throw if given 0', () => {
   6
   7     expect(() => {
   8
   9       resolveAfter(0);
  10     }).toThrow();
  11   });
  12
  13   test('it should throw if given a negative number', () => {
  14
  15     expect(() => {
  16
  17       resolveAfter(-1);
  18     }).toThrow();
  19   });
  20
  21   test('it should throw if given a negative number', () => {
  22
  23     expect(() => {
  24
  25       resolveAfter('lol');
  26     }).toThrow();
  27   });
  28
  29   test('it should resolve after the specified number of times', () => {
  30
  31     expect(() => {
  32
  33       const { counter, resolveAfterThree } = resolveAfter(3);
  34       let resolved = false;
  35
  36       resolveAfterThree.then(() => (resolved = true));
  37       counter();
  38       expect(resolved).toBe(false);
  39       counter();
  40       expect(resolved).toBe(false);
  41       counter();
  42       expect(resolved).toBe(true);
  43     }).toThrow();
  44   });
  45 });