jss-cache/lib/index.test.js

JSS plugin that caches the rules and delivers insane performance.

'use strict';

var _expect = require('expect.js');

var _expect2 = _interopRequireDefault(_expect);

var _jss = require('jss');

var _index = require('./index');

var _index2 = _interopRequireDefault(_index);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }

describe('jss-cache', function () {
  var jss = void 0;

  beforeEach(function () {
    jss = (0, _jss.create)().use((0, _index2['default'])());
  });

  describe('ensure cache is used', function () {
    it('should not call onCreateRule', function () {
      var styles = { a: { color: 'red' } };
      var onCreateRuleCalled = false;
      // After the first call its cached.
      jss.createStyleSheet(styles);
      jss.use({
        onCreateRule: function onCreateRule() {
          onCreateRuleCalled = true;
        }
      });
      jss.createStyleSheet(styles);
      (0, _expect2['default'])(onCreateRuleCalled).to.be(false);
    });

    it('should not call processors on a cached rule', function () {
      var styles = { a: { color: 'red' } };
      var onProcessRuleCalled = false;
      // After the first call its cached.
      jss.createStyleSheet(styles);
      jss.use({
        onProcessRule: function onProcessRule() {
          onProcessRuleCalled = true;
        }
      });
      jss.createStyleSheet(styles);
      (0, _expect2['default'])(onProcessRuleCalled).to.be(false);
    });
  });

  describe('linked rules should not be cached', function () {
    it('should call onCreateRule', function () {
      var styles = { a: { color: 'red' } };
      var options = { link: true };
      var onCreateRuleCalled = false;
      // After the first call it should not be cached.
      jss.createStyleSheet(styles, options);
      jss.use({
        onCreateRule: function onCreateRule() {
          onCreateRuleCalled = true;
        }
      });
      jss.createStyleSheet(styles, options);
      (0, _expect2['default'])(onCreateRuleCalled).to.be(true);
    });
  });
}); /* eslint-disable no-underscore-dangle */