gitlab-org--gitlab-foss/spec/frontend/line_highlighter_spec.js

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/* eslint-disable no-return-assign, no-new, no-underscore-dangle */
import $ from 'jquery';
import * as utils from '~/lib/utils/common_utils';
import LineHighlighter from '~/line_highlighter';
describe('LineHighlighter', () => {
const testContext = {};
const clickLine = (number, eventData = {}) => {
if ($.isEmptyObject(eventData)) {
return $(`#L${number}`).click();
}
const e = $.Event('click', eventData);
return $(`#L${number}`).trigger(e);
};
beforeEach(() => {
loadFixtures('static/line_highlighter.html');
testContext.class = new LineHighlighter();
testContext.css = testContext.class.highlightLineClass;
return (testContext.spies = {
__setLocationHash__: jest
.spyOn(testContext.class, '__setLocationHash__')
.mockImplementation(() => {}),
});
});
describe('behavior', () => {
it('highlights one line given in the URL hash', () => {
new LineHighlighter({ hash: '#L13' });
expect($('#LC13')).toHaveClass(testContext.css);
});
it('highlights one line given in the URL hash with given CSS class name', () => {
const hiliter = new LineHighlighter({ hash: '#L13', highlightLineClass: 'hilite' });
expect(hiliter.highlightLineClass).toBe('hilite');
expect($('#LC13')).toHaveClass('hilite');
expect($('#LC13')).not.toHaveClass('hll');
});
it('highlights a range of lines given in the URL hash', () => {
new LineHighlighter({ hash: '#L5-25' });
expect($(`.${testContext.css}`).length).toBe(21);
for (let line = 5; line <= 25; line += 1) {
expect($(`#LC${line}`)).toHaveClass(testContext.css);
}
});
it('scrolls to the first highlighted line on initial load', () => {
jest.spyOn(utils, 'scrollToElement');
new LineHighlighter({ hash: '#L5-25' });
expect(utils.scrollToElement).toHaveBeenCalledWith('#L5', expect.anything());
});
it('discards click events', () => {
const clickSpy = jest.fn();
$('a[data-line-number]').click(clickSpy);
clickLine(13);
expect(clickSpy.mock.calls[0][0].isDefaultPrevented()).toEqual(true);
});
it('handles garbage input from the hash', () => {
const func = () => {
return new LineHighlighter({ fileHolderSelector: '#blob-content-holder' });
};
expect(func).not.toThrow();
});
it('handles hashchange event', () => {
const highlighter = new LineHighlighter();
jest.spyOn(highlighter, 'highlightHash').mockImplementation(() => {});
window.dispatchEvent(new Event('hashchange'), 'L15');
expect(highlighter.highlightHash).toHaveBeenCalled();
});
});
describe('clickHandler', () => {
it('handles clicking on a child icon element', () => {
const spy = jest.spyOn(testContext.class, 'setHash');
$('#L13 [data-testid="link-icon"]').mousedown().click();
expect(spy).toHaveBeenCalledWith(13);
expect($('#LC13')).toHaveClass(testContext.css);
});
describe('without shiftKey', () => {
it('highlights one line when clicked', () => {
clickLine(13);
expect($('#LC13')).toHaveClass(testContext.css);
});
it('unhighlights previously highlighted lines', () => {
clickLine(13);
clickLine(20);
expect($('#LC13')).not.toHaveClass(testContext.css);
expect($('#LC20')).toHaveClass(testContext.css);
});
it('sets the hash', () => {
const spy = jest.spyOn(testContext.class, 'setHash');
clickLine(13);
expect(spy).toHaveBeenCalledWith(13);
});
});
describe('with shiftKey', () => {
it('sets the hash', () => {
const spy = jest.spyOn(testContext.class, 'setHash');
clickLine(13);
clickLine(20, {
shiftKey: true,
});
expect(spy).toHaveBeenCalledWith(13);
expect(spy).toHaveBeenCalledWith(13, 20);
});
describe('without existing highlight', () => {
it('highlights the clicked line', () => {
clickLine(13, {
shiftKey: true,
});
expect($('#LC13')).toHaveClass(testContext.css);
expect($(`.${testContext.css}`).length).toBe(1);
});
it('sets the hash', () => {
const spy = jest.spyOn(testContext.class, 'setHash');
clickLine(13, {
shiftKey: true,
});
expect(spy).toHaveBeenCalledWith(13);
});
});
describe('with existing single-line highlight', () => {
it('uses existing line as last line when target is lesser', () => {
clickLine(20);
clickLine(15, {
shiftKey: true,
});
expect($(`.${testContext.css}`).length).toBe(6);
for (let line = 15; line <= 20; line += 1) {
expect($(`#LC${line}`)).toHaveClass(testContext.css);
}
});
it('uses existing line as first line when target is greater', () => {
clickLine(5);
clickLine(10, {
shiftKey: true,
});
expect($(`.${testContext.css}`).length).toBe(6);
for (let line = 5; line <= 10; line += 1) {
expect($(`#LC${line}`)).toHaveClass(testContext.css);
}
});
});
describe('with existing multi-line highlight', () => {
beforeEach(() => {
clickLine(10, {
shiftKey: true,
});
clickLine(13, {
shiftKey: true,
});
});
it('uses target as first line when it is less than existing first line', () => {
clickLine(5, {
shiftKey: true,
});
expect($(`.${testContext.css}`).length).toBe(6);
for (let line = 5; line <= 10; line += 1) {
expect($(`#LC${line}`)).toHaveClass(testContext.css);
}
});
it('uses target as last line when it is greater than existing first line', () => {
clickLine(15, {
shiftKey: true,
});
expect($(`.${testContext.css}`).length).toBe(6);
for (let line = 10; line <= 15; line += 1) {
expect($(`#LC${line}`)).toHaveClass(testContext.css);
}
});
});
});
});
describe('hashToRange', () => {
beforeEach(() => {
testContext.subject = testContext.class.hashToRange;
});
it('extracts a single line number from the hash', () => {
expect(testContext.subject('#L5')).toEqual([5, null]);
});
it('extracts a range of line numbers from the hash', () => {
expect(testContext.subject('#L5-15')).toEqual([5, 15]);
});
it('returns [null, null] when the hash is not a line number', () => {
expect(testContext.subject('#foo')).toEqual([null, null]);
});
});
describe('highlightLine', () => {
beforeEach(() => {
testContext.subject = testContext.class.highlightLine;
});
it('highlights the specified line', () => {
testContext.subject(13);
expect($('#LC13')).toHaveClass(testContext.css);
});
it('accepts a String-based number', () => {
testContext.subject('13');
expect($('#LC13')).toHaveClass(testContext.css);
});
});
describe('setHash', () => {
beforeEach(() => {
testContext.subject = testContext.class.setHash;
});
it('sets the location hash for a single line', () => {
testContext.subject(5);
expect(testContext.spies.__setLocationHash__).toHaveBeenCalledWith('#L5');
});
it('sets the location hash for a range', () => {
testContext.subject(5, 15);
expect(testContext.spies.__setLocationHash__).toHaveBeenCalledWith('#L5-15');
});
});
});