/
A11YPanel.test.js
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/
A11YPanel.test.js
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import React from 'react';
import { mount } from 'enzyme';
import { ThemeProvider, themes, convert } from '@storybook/theming';
import { STORY_RENDERED } from '@storybook/core-events';
import { ScrollArea } from '@storybook/components';
import { A11YPanel } from './A11YPanel';
import { EVENTS } from '../constants';
function createApi() {
return {
emit: jest.fn(),
on: jest.fn(),
off: jest.fn(),
};
}
const axeResult = {
incomplete: [
{
id: 'color-contrast',
impact: 'serious',
tags: ['cat.color', 'wcag2aa', 'wcag143'],
description:
'Ensures the contrast between foreground and background colors meets WCAG 2 AA contrast ratio thresholds',
help: 'Elements must have sufficient color contrast',
helpUrl: 'https://dequeuniversity.com/rules/axe/3.2/color-contrast?application=axeAPI',
nodes: [],
},
],
passes: [
{
id: 'aria-allowed-attr',
impact: null,
tags: ['cat.aria', 'wcag2a', 'wcag412'],
description: "Ensures ARIA attributes are allowed for an element's role",
help: 'Elements must only use allowed ARIA attributes',
helpUrl: 'https://dequeuniversity.com/rules/axe/3.2/aria-allowed-attr?application=axeAPI',
nodes: [],
},
],
violations: [
{
id: 'color-contrast',
impact: 'serious',
tags: ['cat.color', 'wcag2aa', 'wcag143'],
description:
'Ensures the contrast between foreground and background colors meets WCAG 2 AA contrast ratio thresholds',
help: 'Elements must have sufficient color contrast',
helpUrl: 'https://dequeuniversity.com/rules/axe/3.2/color-contrast?application=axeAPI',
nodes: [],
},
],
};
function ThemedA11YPanel(props) {
return (
<ThemeProvider theme={convert(themes.light)}>
<A11YPanel {...props} />
</ThemeProvider>
);
}
describe('A11YPanel', () => {
it('should register STORY_RENDERED, RESULT and ERROR updater on mount', () => {
// given
const api = createApi();
expect(api.on).not.toHaveBeenCalled();
// when
mount(<ThemedA11YPanel api={api} />);
// then
expect(api.on.mock.calls.length).toBe(3);
expect(api.on.mock.calls[0][0]).toBe(STORY_RENDERED);
expect(api.on.mock.calls[1][0]).toBe(EVENTS.RESULT);
expect(api.on.mock.calls[2][0]).toBe(EVENTS.ERROR);
});
it('should request a run on tab activation', () => {
// given
const api = createApi();
const wrapper = mount(<ThemedA11YPanel api={api} />);
expect(api.emit).not.toHaveBeenCalled();
// when
wrapper.setProps({ active: true });
wrapper.update();
// then
expect(api.emit).toHaveBeenCalledWith(EVENTS.REQUEST);
expect(wrapper.find(ScrollArea).length).toBe(0);
});
it('should deregister STORY_RENDERED, RESULT and ERROR updater on unmount', () => {
// given
const api = createApi();
const wrapper = mount(<ThemedA11YPanel api={api} />);
expect(api.off).not.toHaveBeenCalled();
// when
wrapper.unmount();
// then
expect(api.off.mock.calls.length).toBe(3);
expect(api.off.mock.calls[0][0]).toBe(STORY_RENDERED);
expect(api.off.mock.calls[1][0]).toBe(EVENTS.RESULT);
expect(api.off.mock.calls[2][0]).toBe(EVENTS.ERROR);
});
it('should update run result', () => {
// given
const api = createApi();
const wrapper = mount(<ThemedA11YPanel api={api} active />);
const onUpdate = api.on.mock.calls.find(([event]) => event === EVENTS.RESULT)[1];
expect(
wrapper
.find('button')
.last()
.text()
.trim()
).toBe('Rerun tests');
// when
onUpdate(axeResult);
// then
expect(
wrapper
.find('button')
.last()
.text()
.trim()
).toBe('Tests completed');
});
it('should request run', () => {
// given
const api = createApi();
const wrapper = mount(<ThemedA11YPanel api={api} active />);
const request = api.on.mock.calls.find(([event]) => event === STORY_RENDERED)[1];
expect(
wrapper
.find('button')
.last()
.text()
.trim()
).toBe('Rerun tests');
expect(api.emit).not.toHaveBeenCalled();
// when
request();
// then
expect(
wrapper
.find('button')
.last()
.text()
.trim()
).toBe('Running test');
expect(api.emit).toHaveBeenCalledWith(EVENTS.REQUEST);
});
it('should NOT request run on inactive tab', () => {
// given
const api = createApi();
mount(<ThemedA11YPanel api={api} active={false} />);
const request = api.on.mock.calls.find(([event]) => event === STORY_RENDERED)[1];
expect(api.emit).not.toHaveBeenCalled();
// when
request();
// then
expect(api.emit).not.toHaveBeenCalled();
});
it('should render report', () => {
// given
const api = createApi();
const wrapper = mount(<ThemedA11YPanel api={api} active />);
const onUpdate = api.on.mock.calls.find(([event]) => event === EVENTS.RESULT)[1];
// when
onUpdate(axeResult);
// then
expect(wrapper.find(A11YPanel)).toMatchSnapshot();
});
it("should render loader when it's running", () => {
// given
const api = createApi();
const wrapper = mount(<ThemedA11YPanel api={api} active />);
const request = api.on.mock.calls.find(([event]) => event === STORY_RENDERED)[1];
// when
request();
wrapper.update();
// then
expect(wrapper.find('ScrollArea').length).toBe(0);
expect(wrapper.find('Loader').length).toBe(1);
expect(wrapper.find('ActionBar').length).toBe(1);
expect(wrapper.find('Loader')).toMatchSnapshot();
});
it('should NOT anything when tab is not active', () => {
// given
const api = createApi();
// when
const wrapper = mount(<ThemedA11YPanel api={api} active={false} />);
// then
expect(wrapper.find('ScrollArea').length).toBe(0);
expect(wrapper.find('ActionBar').length).toBe(0);
});
});