grumpkin

grumpkin

grumpkin computes the CSS properties applied to a React component, given a CSS file.

Installation

npm install grumpkin

API

grumpkin(ReactElement, String) => Object

grumpkin accepts a

• ReactElement argument
• String argument, the CSS

and returns an object literal with the computed properties.

Usage

/* test/style.css */
div { cursor: pointer; }

div.foo {
  width: 46px;
  color: #fff;
}

.foo {
  width: 100px;
  height: 300px;
}

#bar { height: 50px; }

import 'babel-polyfill';
import { before, describe, it } from 'mocha';
import React from 'react';
import chai from 'chai';
import fileSystem from 'fs';
import grumpkin from 'grumpkin';
chai.should();

describe('grumpkin', () => {
  let stylesheet = null;
  before((done) => {
    fileSystem.readFile('./test/style.css', 'utf8', (exception, readData) => {
      stylesheet = readData;
      done();
    });
  });

  it('simple render', () => {
    const element = <div className="foo" id="bar">Hello World!</div>;
    const computedStyle = grumpkin(element, stylesheet);
    computedStyle.should.have.property('width').and.equal('46px');
    computedStyle.should.have.property('height').and.equal('50px');
    computedStyle.should.have.property('color').and.equal('#fff');
    computedStyle.should.have.property('cursor').and.equal('pointer');
  });
});