68 lines
2.1 KiB
JavaScript
68 lines
2.1 KiB
JavaScript
/* eslint-disable no-return-assign */
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import $ from 'jquery';
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import { setHTMLFixture, resetHTMLFixture } from 'helpers/fixtures';
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import syntaxHighlight from '~/syntax_highlight';
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describe('Syntax Highlighter', () => {
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const stubUserColorScheme = (value) => {
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if (window.gon == null) {
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window.gon = {};
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}
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return (window.gon.user_color_scheme = value);
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};
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// We have to bind `document.querySelectorAll` to `document` to not mess up the fn's context
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describe.each`
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desc | fn
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${'jquery'} | ${$}
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${'vanilla all'} | ${document.querySelectorAll.bind(document)}
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${'vanilla single'} | ${document.querySelector.bind(document)}
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`('highlight using $desc syntax', ({ fn }) => {
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describe('on a js-syntax-highlight element', () => {
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beforeEach(() => {
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setHTMLFixture('<div class="js-syntax-highlight"></div>');
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});
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afterEach(() => {
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resetHTMLFixture();
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});
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it('applies syntax highlighting', () => {
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stubUserColorScheme('monokai');
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syntaxHighlight(fn('.js-syntax-highlight'));
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expect(fn('.js-syntax-highlight')).toHaveClass('monokai');
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});
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});
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describe('on a parent element', () => {
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beforeEach(() => {
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setHTMLFixture(
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'<div class="parent">\n <div class="js-syntax-highlight"></div>\n <div class="foo"></div>\n <div class="js-syntax-highlight"></div>\n</div>',
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);
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});
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afterEach(() => {
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resetHTMLFixture();
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});
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it('applies highlighting to all applicable children', () => {
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stubUserColorScheme('monokai');
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syntaxHighlight(fn('.parent'));
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expect(fn('.parent')).not.toHaveClass('monokai');
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expect(fn('.foo')).not.toHaveClass('monokai');
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expect(document.querySelectorAll('.monokai').length).toBe(2);
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});
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it('prevents an infinite loop when no matches exist', () => {
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setHTMLFixture('<div></div>');
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const highlight = () => syntaxHighlight(fn('div'));
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expect(highlight).not.toThrow();
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});
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});
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});
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});
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