Arslan Haytiyev arslantx
arslantx
/ test.js
Created
July 6, 2021 06:53
— forked from apieceofbart/test.js
Async testing with jest fake timers and promises
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| // Let's say you have a function that does some async operation inside setTimeout (think of polling for data) | |
| function runInterval(callback, interval = 1000) { | |
| setInterval(async () => { | |
| const results = await Promise.resolve(42) // this might fetch some data from server | |
| callback(results) | |
| }, interval) | |
| } | |
| // Goal: We want to test that function - make sure our callback was called |