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import { shallowMount } from '@vue/test-utils';
import { nextTick } from 'vue';
import { HIGHLIGHT_CLASS_NAME } from '~/vue_shared/components/blob_viewers/constants';
import SimpleViewer from '~/vue_shared/components/blob_viewers/simple_viewer.vue';
describe('Blob Simple Viewer component', () => {
let wrapper;
const contentMock = `<span id="LC1">First</span>\n<span id="LC2">Second</span>\n<span id="LC3">Third</span>`;
const blobHash = 'foo-bar';
function createComponent(content = contentMock, isRawContent = false, glFeatures = {}) {
wrapper = shallowMount(SimpleViewer, {
provide: {
blobHash,
glFeatures,
},
propsData: {
content,
type: 'text',
fileName: 'test.js',
isRawContent,
},
});
}
afterEach(() => {
wrapper.destroy();
});
it('does not fail if content is empty', () => {
const spy = jest.spyOn(window.console, 'error');
createComponent('');
expect(spy).not.toHaveBeenCalled();
});
describe('rendering', () => {
beforeEach(() => {
createComponent();
});
it('matches the snapshot', () => {
expect(wrapper.element).toMatchSnapshot();
});
it('renders exactly three lines', () => {
expect(wrapper.findAll('.js-line-number')).toHaveLength(3);
});
it('renders the content without transformations', () => {
expect(wrapper.html()).toContain(contentMock);
});
});
describe('functionality', () => {
const scrollIntoViewMock = jest.fn();
HTMLElement.prototype.scrollIntoView = scrollIntoViewMock;
beforeEach(() => {
window.location.hash = '#LC2';
createComponent();
});
afterEach(() => {
window.location.hash = '';
});
it('scrolls to requested line when rendered', () => {
const linetoBeHighlighted = wrapper.find('#LC2');
expect(scrollIntoViewMock).toHaveBeenCalled();
expect(wrapper.vm.highlightedLine).toBe(linetoBeHighlighted.element);
expect(linetoBeHighlighted.classes()).toContain(HIGHLIGHT_CLASS_NAME);
});
it('switches highlighting when another line is selected', async () => {
const currentlyHighlighted = wrapper.find('#LC2');
const hash = '#LC3';
const linetoBeHighlighted = wrapper.find(hash);
expect(wrapper.vm.highlightedLine).toBe(currentlyHighlighted.element);
wrapper.vm.scrollToLine(hash);
await nextTick();
expect(wrapper.vm.highlightedLine).toBe(linetoBeHighlighted.element);
expect(currentlyHighlighted.classes()).not.toContain(HIGHLIGHT_CLASS_NAME);
expect(linetoBeHighlighted.classes()).toContain(HIGHLIGHT_CLASS_NAME);
});
});
});
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