10_19 testing review.md

Don't forget to call for help if you need it in your breakout rooms!

Warm Up

• What does the async keyword do?

• What does the await keyword do?

• Convert this function to use async / await: ( https://repl.it/@khalidwilliams/2006M3-async-await-practice )

  // https://api.adviceslip.com/
  
  function getAdvice () {
  	fetch('https://api.adviceslip.com/advice')
  		.then(response  => response.json())
  		.then(adviceSlip => console.log(adviceSlip.advice))
  		.catch(error => console.error(error));
  }
  
  getAdvice();

• Why would you mock a network request in a test?

• At a high level, what steps are necessary to mock out a network request?

• Other questions? Put them here: https://docs.google.com/document/d/1td50LnCOA8VbAVA0KlOjm31Ach6F5NEQCy4QxgZhmOA/edit#

Hint: Don't be afraid to look at documentation for any of these questions!

if i add async key word to a function say

async function addNumbers (num1, num2) {
	return num1 + num 2
}

it will return a Promise with Resolve and Reject which can be handled by .catch, .then, .finally
await keyword is used to block execution of code inside an async function say

async function addAndMultiply ( num1, num2, multi ) {
	return await addNumbers(num1, num2) * multi
}```

and for your function it will look kinda like this
```javascript
const getAdvice = async () => await fetch('https://api.adviceslip.com/advice')
		.then(response  => response.json())
		.catch(error => console.error(error));

getAdvice()
	.then(advice => {
		const advice =  advice
}).catch(error => console.log(error));