React Jest tests yeoman generator

What's that ?

This is a Yeoman generator used to generate Jest snapshot tests by parsing react components defaultProps and propTypes. The tests are linted with prettier and outputted to the current directory's __tests__ folder.

Why ?

Writing smoke tests for well-defined components can (and should) easily be offloaded to software. This is a solution I use across projects to bootstrap tests.

Installation

First, install Yeoman and generator-react-jest-tests using npm (we assume you have pre-installed node.js).

npm install -g yo
npm install -g generator-react-jest-tests

Commands

Suppose you have the following file structure

- app/
	- components/
      - MyComp.js
      - MaybeSome.css
      - AndA.png
	- storesOrUtils/
      - someFile.js

Silent :

yo react-jest-tests:test

Verbose :

DEBUG=generator-react-jest-tests* yo react-jest-tests:test

     _-----_
    |       |
    |--(o)--|    ╭──────────────────────────╮
   `---------´   │    Let's create tests    │
    ( _´U`_ )    ╰──────────────────────────╯
    /___A___\   /
     |  ~  |
   __'.___.'__
 ´   `  |° ´ Y `

? Give me the path to components please ! (./src/components/)

Give the path to your folder or cd to it and put ./ as path

Will output :

create __tests__/MyComp.js

and result in :

- app/
	- components/
    - __tests__
      - MyComp.test.js
    - MyComp.js
    - MaybeSome.css
    - AndA.png
  - storesOrUtils/
    - someFile.js

- app/
	- components/
      - __tests__
          - MyComp.test.js
      - MyComp.js
      - MaybeSome.css
      - AndA.png
	- storesOrUtils/
      - someFile.js

Run jest to make sure everything is working as expected.

Any error can be resolved by specifying defaultProps, if no defaultProps are passed propTypes will be parsed to try to generate fake data. Fake Data generation from propTypes is a WIP.

To write seamless and predictable tests add defaultProps to your component definitions.

Conflicts

By default it won't overwrite anything without asking you first.