spec/javascripts/extensions/element_spec.js.es6


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require('../spec_helper');
require('extensions/element');

(() => {
  describe('Element extensions', function () {
    beforeEach(() => {
      this.element = document.createElement('ul');
    });

    describe('matches', () => {
      it('returns true if element matches the selector', () => {
        expect(this.element.matches('ul')).toBeTruthy();
      });

      it("returns false if element doesn't match the selector", () => {
        expect(this.element.matches('.not-an-element')).toBeFalsy();
      });
    });

    describe('closest', () => {
      beforeEach(() => {
        this.childElement = document.createElement('li');
        this.element.appendChild(this.childElement);
      });

      it('returns the closest parent that matches the selector', () => {
        expect(this.childElement.closest('ul').toString()).toBe(this.element.toString());
      });

      it('returns itself if it matches the selector', () => {
        expect(this.childElement.closest('li').toString()).toBe(this.childElement.toString());
      });

      it('returns undefined if nothing matches the selector', () => {
        expect(this.childElement.closest('.no-an-element')).toBeFalsy();
      });
    });
  });
})();