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?

  • Used to make a fxn asynchronous. It goes before the word fxn in es5, in es6 before the parens.
  • Allows us to use the await keyword within the fxn.
  • Makes a fxn return a promise

• What does the await keyword do?

  • Must be used in a fxn declared with the async keyword
  • Allows us to access a resolved value of a promise
  • It allows us to block the callstack of a fxn w/async code
  • Allows us to run async code as if it were synchronous

• 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?

  • Allows us to control what is returned
  • Prevents us from making actual network requests, potentially saving time and money

• 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!