Testing with Mocha – Kevin Wang – Medium

Testing with Mocha  #tdd #react #mocha #javascript #reactjs

  • js file and running “npm test” in the console.var assert = function() { describe(‘#indexOf()’, function() { it(‘should return -1 when the value is not present’, function() { assert.equal(-1, [1,2,3].
  • indexOf(4)); }); });});The test should pass and you should see the below.From the example above though, the function that the test is testing for is written in the same file.
  • toFixed(2) }, sleepApneaIncrease: function(amount){ return (amount * 1.06).
  • toFixed(2) }, heartDiseaseIncrease: function(amount){ return (amount * 1.17).
  • toFixed(2) }, checkCondition: function(amount, condition){ switch (condition) { case “Allergies”: return case “Sleep Apnea”: return case “Heart Disease”: return default: return 0; } }}I store them all in an object so thatI am able to export out and require them when I need to.

My first experience with Mocha is at Flatiron. When we were doing Javascript labs/work we used Mocha to test out the code that we wrote, it made sure that the results are as we expected. This was my…
Continue reading “Testing with Mocha – Kevin Wang – Medium”

Convert React.createClass to ES6 Class

Convert React.createClass to ES6 Class



#ReactJS #ES6 #JS

  • This video and article go over how to convert to ES6 classes.
  • When replacing there are 2 options:

    This post covers converting to ES6 classes – another one covers stateless functions.

  • The helpful folks at Facebook created a project called react-codemod which holds a suite of scripts for automatically transforming old-and-busted React code into the modern style.
  • Right now it contains 11 different scripts to transform all kinds of things, like changing to , converting to ES6 classes, and even sorting the methods in a component to match best practices.
  • You can see the full list in the repo but we’ll go over how to apply the createClass -> ES6 transform here.

As of React 15.5, createClass is deprecated. You’ll get warnings in the console if you’re using it in your code – and, when React 16 comes out, createClass will be removed entirely.
Continue reading “Convert React.createClass to ES6 Class”

How to Test React and MobX with Jest – ReactJS News

#Applications How to Test React and MobX with Jest  #frameworks #developer

  • Enzyme will be our testing tool of choice, since it will allow us to test React components with jQuery-like syntax.
  • Adding MobX and Enzyme to our React application really made the data and testing layers fun to work with.
  • Since MobX stores act just like object literals, we can test our React component by injecting it with any object literal to simulate a store state.
  • The sample todo application is incredibly easy to build with React and MobX, and in this article we’ll cover unit and UI/functional testing for React and MobX with Enzyme.
  • If you want to do this with React and MobX, you should simply replace the mock store with a real MobX store.

If you’re developing React applications, then you know that the React community has been
bursting with new ideas and tools over the last year. When investigating any
new technology to incorporate into a stack, we should consider if it either
makes the workflow much easier, or solves a key problem. MobX and Enzyme are 2 new
libraries in the React world that fit the bill. This sample todo application
is incredibly easy to build with React and MobX, and in this article we’ll cover
unit and UI/functional testing for React and MobX with Enzyme. @ReactiveConf: How to test #ReactJS and MobX with Jest:

Continue reading “How to Test React and MobX with Jest – ReactJS News”

How to Test React and MobX with Jest

New tutorial: How to Test @ReactJS and MobX with Jest by @LearnCodeAcad
 #JavaScript #TDD

  • createTodo ( “todo2” ) expect ( store .
  • toBe ( “todo1” ) expect ( store .
  • //don’t use an arrow function, preserve the value of “this” it ( “renders filtered todos” , function () { const wrapper = shallow ( < TodoList store = { this .
  • Since MobX stores act just like object literals, we can test our React component by injecting it with any object literal to simulate a store state.
  • If you want to do this with React and MobX, you should simply replace the mock store with a real MobX store.

Read the full article, click here.


@semaphoreci: “New tutorial: How to Test @ReactJS and MobX with Jest by @LearnCodeAcad
#JavaScript #TDD”


If you’re developing React applications, then you know that the React community has been
bursting with new ideas and tools over the last year. When investigating any
new technology to incorporate into a stack, we should consider if it either
makes the workflow much easier, or solves a key problem. MobX and Enzyme are 2 new
libraries in the React world that fit the bill. This sample todo application
is incredibly easy to build with React and MobX, and in this article we’ll cover
unit and UI/functional testing for React and MobX with Enzyme.


How to Test React and MobX with Jest

Stubbing React Containers for Testing — KADIRA VOICE

This is how we can #stub #reactjs containers for the testing purpose. -

  • Instead of the Container, react-stubber will render the component we’ve provided.
  • We have a set of presentational UI components with some containers that wrap UI components with the data.
  • Stubbing React Containers for Testing
  • We provide a dummy component that replaces the container.
  • We’ll face a lot of issues when we are testing our Post UI component.

Read the full article, click here.


@meteorhacks: “This is how we can #stub #reactjs containers for the testing purpose. -”


In many React apps, we follow the Container pattern with whatever container library we use, whether it’s Redux, React Komposer, Meteor or…


Stubbing React Containers for Testing — KADIRA VOICE