338 lines
10 KiB
TypeScript
338 lines
10 KiB
TypeScript
/*
|
|
Copyright 2020 - 2021 The Matrix.org Foundation C.I.C.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
import * as React from "react";
|
|
// eslint-disable-next-line deprecate/import
|
|
import { mount, ReactWrapper } from "enzyme";
|
|
|
|
import {
|
|
IState,
|
|
reducer,
|
|
RovingTabIndexProvider,
|
|
RovingTabIndexWrapper,
|
|
Type,
|
|
useRovingTabIndex,
|
|
} from "../../src/accessibility/RovingTabIndex";
|
|
|
|
const Button = (props) => {
|
|
const [onFocus, isActive, ref] = useRovingTabIndex();
|
|
return <button {...props} onFocus={onFocus} tabIndex={isActive ? 0 : -1} ref={ref} />;
|
|
};
|
|
|
|
const checkTabIndexes = (buttons: ReactWrapper, expectations: number[]) => {
|
|
expect(buttons.length).toBe(expectations.length);
|
|
for (let i = 0; i < buttons.length; i++) {
|
|
expect(buttons.at(i).prop("tabIndex")).toBe(expectations[i]);
|
|
}
|
|
};
|
|
|
|
// give the buttons keys for the fibre reconciler to not treat them all as the same
|
|
const button1 = <Button key={1}>a</Button>;
|
|
const button2 = <Button key={2}>b</Button>;
|
|
const button3 = <Button key={3}>c</Button>;
|
|
const button4 = <Button key={4}>d</Button>;
|
|
|
|
// mock offsetParent
|
|
Object.defineProperty(HTMLElement.prototype, "offsetParent", {
|
|
get() { return this.parentNode; },
|
|
});
|
|
|
|
describe("RovingTabIndex", () => {
|
|
it("RovingTabIndexProvider renders children as expected", () => {
|
|
const wrapper = mount(<RovingTabIndexProvider>
|
|
{ () => <div><span>Test</span></div> }
|
|
</RovingTabIndexProvider>);
|
|
expect(wrapper.text()).toBe("Test");
|
|
expect(wrapper.html()).toBe('<div><span>Test</span></div>');
|
|
});
|
|
|
|
it("RovingTabIndexProvider works as expected with useRovingTabIndex", () => {
|
|
const wrapper = mount(<RovingTabIndexProvider>
|
|
{ () => <React.Fragment>
|
|
{ button1 }
|
|
{ button2 }
|
|
{ button3 }
|
|
</React.Fragment> }
|
|
</RovingTabIndexProvider>);
|
|
|
|
// should begin with 0th being active
|
|
checkTabIndexes(wrapper.find("button"), [0, -1, -1]);
|
|
|
|
// focus on 2nd button and test it is the only active one
|
|
wrapper.find("button").at(2).simulate("focus");
|
|
wrapper.update();
|
|
checkTabIndexes(wrapper.find("button"), [-1, -1, 0]);
|
|
|
|
// focus on 1st button and test it is the only active one
|
|
wrapper.find("button").at(1).simulate("focus");
|
|
wrapper.update();
|
|
checkTabIndexes(wrapper.find("button"), [-1, 0, -1]);
|
|
|
|
// check that the active button does not change even on an explicit blur event
|
|
wrapper.find("button").at(1).simulate("blur");
|
|
wrapper.update();
|
|
checkTabIndexes(wrapper.find("button"), [-1, 0, -1]);
|
|
|
|
// update the children, it should remain on the same button
|
|
wrapper.setProps({
|
|
children: () => [button1, button4, button2, button3],
|
|
});
|
|
wrapper.update();
|
|
checkTabIndexes(wrapper.find("button"), [-1, -1, 0, -1]);
|
|
|
|
// update the children, remove the active button, it should move to the next one
|
|
wrapper.setProps({
|
|
children: () => [button1, button4, button3],
|
|
});
|
|
wrapper.update();
|
|
checkTabIndexes(wrapper.find("button"), [-1, -1, 0]);
|
|
});
|
|
|
|
it("RovingTabIndexProvider works as expected with RovingTabIndexWrapper", () => {
|
|
const wrapper = mount(<RovingTabIndexProvider>
|
|
{ () => <React.Fragment>
|
|
{ button1 }
|
|
{ button2 }
|
|
<RovingTabIndexWrapper>
|
|
{ ({ onFocus, isActive, ref }) =>
|
|
<button
|
|
onFocus={onFocus}
|
|
tabIndex={isActive ? 0 : -1}
|
|
ref={ref as React.RefObject<HTMLButtonElement>}>.</button>
|
|
}
|
|
</RovingTabIndexWrapper>
|
|
</React.Fragment> }
|
|
</RovingTabIndexProvider>);
|
|
|
|
// should begin with 0th being active
|
|
checkTabIndexes(wrapper.find("button"), [0, -1, -1]);
|
|
|
|
// focus on 2nd button and test it is the only active one
|
|
wrapper.find("button").at(2).simulate("focus");
|
|
wrapper.update();
|
|
checkTabIndexes(wrapper.find("button"), [-1, -1, 0]);
|
|
});
|
|
|
|
describe("reducer functions as expected", () => {
|
|
it("SetFocus works as expected", () => {
|
|
const ref1 = React.createRef<HTMLElement>();
|
|
const ref2 = React.createRef<HTMLElement>();
|
|
expect(reducer({
|
|
activeRef: ref1,
|
|
refs: [ref1, ref2],
|
|
}, {
|
|
type: Type.SetFocus,
|
|
payload: {
|
|
ref: ref2,
|
|
},
|
|
})).toStrictEqual({
|
|
activeRef: ref2,
|
|
refs: [ref1, ref2],
|
|
});
|
|
});
|
|
|
|
it("Unregister works as expected", () => {
|
|
const ref1 = React.createRef<HTMLElement>();
|
|
const ref2 = React.createRef<HTMLElement>();
|
|
const ref3 = React.createRef<HTMLElement>();
|
|
const ref4 = React.createRef<HTMLElement>();
|
|
|
|
let state: IState = {
|
|
activeRef: null,
|
|
refs: [ref1, ref2, ref3, ref4],
|
|
};
|
|
|
|
state = reducer(state, {
|
|
type: Type.Unregister,
|
|
payload: {
|
|
ref: ref2,
|
|
},
|
|
});
|
|
expect(state).toStrictEqual({
|
|
activeRef: null,
|
|
refs: [ref1, ref3, ref4],
|
|
});
|
|
|
|
state = reducer(state, {
|
|
type: Type.Unregister,
|
|
payload: {
|
|
ref: ref3,
|
|
},
|
|
});
|
|
expect(state).toStrictEqual({
|
|
activeRef: null,
|
|
refs: [ref1, ref4],
|
|
});
|
|
|
|
state = reducer(state, {
|
|
type: Type.Unregister,
|
|
payload: {
|
|
ref: ref4,
|
|
},
|
|
});
|
|
expect(state).toStrictEqual({
|
|
activeRef: null,
|
|
refs: [ref1],
|
|
});
|
|
|
|
state = reducer(state, {
|
|
type: Type.Unregister,
|
|
payload: {
|
|
ref: ref1,
|
|
},
|
|
});
|
|
expect(state).toStrictEqual({
|
|
activeRef: null,
|
|
refs: [],
|
|
});
|
|
});
|
|
|
|
it("Register works as expected", () => {
|
|
const ref1 = React.createRef<HTMLElement>();
|
|
const ref2 = React.createRef<HTMLElement>();
|
|
const ref3 = React.createRef<HTMLElement>();
|
|
const ref4 = React.createRef<HTMLElement>();
|
|
|
|
mount(<React.Fragment>
|
|
<span ref={ref1} />
|
|
<span ref={ref2} />
|
|
<span ref={ref3} />
|
|
<span ref={ref4} />
|
|
</React.Fragment>);
|
|
|
|
let state: IState = {
|
|
activeRef: null,
|
|
refs: [],
|
|
};
|
|
|
|
state = reducer(state, {
|
|
type: Type.Register,
|
|
payload: {
|
|
ref: ref1,
|
|
},
|
|
});
|
|
expect(state).toStrictEqual({
|
|
activeRef: ref1,
|
|
refs: [ref1],
|
|
});
|
|
|
|
state = reducer(state, {
|
|
type: Type.Register,
|
|
payload: {
|
|
ref: ref2,
|
|
},
|
|
});
|
|
expect(state).toStrictEqual({
|
|
activeRef: ref1,
|
|
refs: [ref1, ref2],
|
|
});
|
|
|
|
state = reducer(state, {
|
|
type: Type.Register,
|
|
payload: {
|
|
ref: ref3,
|
|
},
|
|
});
|
|
expect(state).toStrictEqual({
|
|
activeRef: ref1,
|
|
refs: [ref1, ref2, ref3],
|
|
});
|
|
|
|
state = reducer(state, {
|
|
type: Type.Register,
|
|
payload: {
|
|
ref: ref4,
|
|
},
|
|
});
|
|
expect(state).toStrictEqual({
|
|
activeRef: ref1,
|
|
refs: [ref1, ref2, ref3, ref4],
|
|
});
|
|
|
|
// test that the automatic focus switch works for unmounting
|
|
state = reducer(state, {
|
|
type: Type.SetFocus,
|
|
payload: {
|
|
ref: ref2,
|
|
},
|
|
});
|
|
expect(state).toStrictEqual({
|
|
activeRef: ref2,
|
|
refs: [ref1, ref2, ref3, ref4],
|
|
});
|
|
|
|
state = reducer(state, {
|
|
type: Type.Unregister,
|
|
payload: {
|
|
ref: ref2,
|
|
},
|
|
});
|
|
expect(state).toStrictEqual({
|
|
activeRef: ref3,
|
|
refs: [ref1, ref3, ref4],
|
|
});
|
|
|
|
// test that the insert into the middle works as expected
|
|
state = reducer(state, {
|
|
type: Type.Register,
|
|
payload: {
|
|
ref: ref2,
|
|
},
|
|
});
|
|
expect(state).toStrictEqual({
|
|
activeRef: ref3,
|
|
refs: [ref1, ref2, ref3, ref4],
|
|
});
|
|
|
|
// test that insertion at the edges works
|
|
state = reducer(state, {
|
|
type: Type.Unregister,
|
|
payload: {
|
|
ref: ref1,
|
|
},
|
|
});
|
|
state = reducer(state, {
|
|
type: Type.Unregister,
|
|
payload: {
|
|
ref: ref4,
|
|
},
|
|
});
|
|
expect(state).toStrictEqual({
|
|
activeRef: ref3,
|
|
refs: [ref2, ref3],
|
|
});
|
|
|
|
state = reducer(state, {
|
|
type: Type.Register,
|
|
payload: {
|
|
ref: ref1,
|
|
},
|
|
});
|
|
|
|
state = reducer(state, {
|
|
type: Type.Register,
|
|
payload: {
|
|
ref: ref4,
|
|
},
|
|
});
|
|
expect(state).toStrictEqual({
|
|
activeRef: ref3,
|
|
refs: [ref1, ref2, ref3, ref4],
|
|
});
|
|
});
|
|
});
|
|
});
|
|
|