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

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