WebPromises Return a promise from your test, and Jest will wait for that promise to resolve. If the promise is rejected, the test will fail. For example, let's say that fetchData returns a promise that is supposed to resolve to the string 'peanut butter'. We could test it with: WebFeb 5, 2024 · The promise returned from the function might resolve after some time, meanwhile, the main executing thread does not wait for the promise to be resolved, it proceeds further execution of...
.then not waiting for resolve from Promise - Stack Overflow
WebInside the getResult () function you may say it must await the result, which makes the execution of getResult () wait for it to resolve the promise, but the caller of getResult () will not wait unless you also tell the caller to ‘await’. So a solution would be calling either: getResult ().then (result=> {console.log (result)}) WebIn other words, the mere existence of a Promise won't keep the process alive. You actually need to put something on the event loop (e.g. create a timer in the processData method). By the way, even if the process stayed alive because of some other I/O, I think the expected output would be Looping before working ryan ralston hunt real estate
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WebDec 8, 2016 · Sometimes a promise may take too long to resolve or reject, and sometimes we just can’t wait for it. There are many use cases in which this may apply, and you may have faced such scenario at least once in your coding life. WebWhen the await keyword is used in a function, the next line of the function is not run before the promise has been resolved or rejected. A Promise can have 3 states in JavaScript: … WebDec 15, 2024 · A promise that is either resolved or rejected is called settled. A settled promise is either fulfilled or rejected How promises are resolved and rejected Here is an example of a promise that will be resolved ( fulfilled state) with the value I am done immediately. let promise = new Promise (function (resolve, reject) { resolve ("I am done"); }); is eating sushi bad