122 lines
4.3 KiB
JavaScript
122 lines
4.3 KiB
JavaScript
/*
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Copyright 2020 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import React from "react";
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import Adapter from "enzyme-adapter-react-16";
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import { configure, mount } from "enzyme";
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import {
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RovingTabIndexProvider,
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RovingTabIndexWrapper,
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useRovingTabIndex,
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} from "../../src/accessibility/RovingTabIndex";
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configure({ adapter: new Adapter() });
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const Button = (props) => {
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const [onFocus, isActive, ref] = useRovingTabIndex();
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return <button {...props} onFocus={onFocus} tabIndex={isActive ? 0 : -1} ref={ref} />;
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};
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const checkTabIndexes = (buttons, expectations) => {
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expect(buttons.length).toBe(expectations.length);
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for (let i = 0; i < buttons.length; i++) {
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expect(buttons.at(i).prop("tabIndex")).toBe(expectations[i]);
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}
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};
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// give the buttons keys for the fibre reconciler to not treat them all as the same
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const button1 = <Button key={1}>a</Button>;
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const button2 = <Button key={2}>b</Button>;
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const button3 = <Button key={3}>c</Button>;
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const button4 = <Button key={4}>d</Button>;
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describe("RovingTabIndex", () => {
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it("RovingTabIndexProvider renders children as expected", () => {
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const wrapper = mount(<RovingTabIndexProvider>
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{() => <div><span>Test</span></div>}
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</RovingTabIndexProvider>);
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expect(wrapper.text()).toBe("Test");
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expect(wrapper.html()).toBe('<div><span>Test</span></div>');
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});
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it("RovingTabIndexProvider works as expected with useRovingTabIndex", () => {
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const wrapper = mount(<RovingTabIndexProvider>
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{() => <React.Fragment>
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{ button1 }
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{ button2 }
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{ button3 }
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</React.Fragment>}
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</RovingTabIndexProvider>);
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// should begin with 0th being active
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checkTabIndexes(wrapper.find("button"), [0, -1, -1]);
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// focus on 2nd button and test it is the only active one
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wrapper.find("button").at(2).simulate("focus");
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wrapper.update();
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checkTabIndexes(wrapper.find("button"), [-1, -1, 0]);
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// focus on 1st button and test it is the only active one
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wrapper.find("button").at(1).simulate("focus");
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wrapper.update();
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checkTabIndexes(wrapper.find("button"), [-1, 0, -1]);
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// check that the active button does not change even on an explicit blur event
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wrapper.find("button").at(1).simulate("blur");
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wrapper.update();
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checkTabIndexes(wrapper.find("button"), [-1, 0, -1]);
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// update the children, it should remain on the same button
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wrapper.setProps({
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children: () => [button1, button4, button2, button3],
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});
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wrapper.update();
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checkTabIndexes(wrapper.find("button"), [-1, -1, 0, -1]);
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// update the children, remove the active button, it should move to the next one
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wrapper.setProps({
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children: () => [button1, button4, button3],
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});
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wrapper.update();
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checkTabIndexes(wrapper.find("button"), [-1, -1, 0]);
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});
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it("RovingTabIndexProvider works as expected with RovingTabIndexWrapper", () => {
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const wrapper = mount(<RovingTabIndexProvider>
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{() => <React.Fragment>
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{ button1 }
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{ button2 }
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<RovingTabIndexWrapper>
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{({onFocus, isActive, ref}) =>
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<button onFocus={onFocus} tabIndex={isActive ? 0 : -1} ref={ref}>.</button>
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}
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</RovingTabIndexWrapper>
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</React.Fragment>}
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</RovingTabIndexProvider>);
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// should begin with 0th being active
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checkTabIndexes(wrapper.find("button"), [0, -1, -1]);
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// focus on 2nd button and test it is the only active one
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wrapper.find("button").at(2).simulate("focus");
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wrapper.update();
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checkTabIndexes(wrapper.find("button"), [-1, -1, 0]);
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});
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});
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