debian-mirror-gitlab/spec/frontend/syntax_highlight_spec.js

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/* 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) {
window.gon = {};
}
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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
describe.each`
desc | fn
${'jquery'} | ${$}
${'vanilla all'} | ${document.querySelectorAll.bind(document)}
${'vanilla single'} | ${document.querySelector.bind(document)}
`('highlight using $desc syntax', ({ fn }) => {
describe('on a js-syntax-highlight element', () => {
beforeEach(() => {
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setHTMLFixture('<div class="js-syntax-highlight"></div>');
});
afterEach(() => {
resetHTMLFixture();
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});
it('applies syntax highlighting', () => {
stubUserColorScheme('monokai');
syntaxHighlight(fn('.js-syntax-highlight'));
expect(fn('.js-syntax-highlight')).toHaveClass('monokai');
});
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});
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describe('on a parent element', () => {
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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afterEach(() => {
resetHTMLFixture();
});
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it('applies highlighting to all applicable children', () => {
stubUserColorScheme('monokai');
syntaxHighlight(fn('.parent'));
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expect(fn('.parent')).not.toHaveClass('monokai');
expect(fn('.foo')).not.toHaveClass('monokai');
expect(document.querySelectorAll('.monokai').length).toBe(2);
});
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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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});
});
});