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/* eslint-disable no-return-assign */
import $ from 'jquery';
import syntaxHighlight from '~/syntax_highlight';
describe('Syntax Highlighter', () => {
const stubUserColorScheme = (value) => {
if (window.gon == null) {
window.gon = {};
}
return (window.gon.user_color_scheme = value);
};
// 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(() => {
setFixtures('<div class="js-syntax-highlight"></div>');
});
it('applies syntax highlighting', () => {
stubUserColorScheme('monokai');
syntaxHighlight(fn('.js-syntax-highlight'));
expect(fn('.js-syntax-highlight')).toHaveClass('monokai');
});
});
describe('on a parent element', () => {
beforeEach(() => {
setFixtures(
'<div class="parent">\n <div class="js-syntax-highlight"></div>\n <div class="foo"></div>\n <div class="js-syntax-highlight"></div>\n</div>',
);
});
it('applies highlighting to all applicable children', () => {
stubUserColorScheme('monokai');
syntaxHighlight(fn('.parent'));
expect(fn('.parent')).not.toHaveClass('monokai');
expect(fn('.foo')).not.toHaveClass('monokai');
expect(document.querySelectorAll('.monokai').length).toBe(2);
});
it('prevents an infinite loop when no matches exist', () => {
setFixtures('<div></div>');
const highlight = () => syntaxHighlight(fn('div'));
expect(highlight).not.toThrow();
});
});
});
});
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