/* 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"; import { render } from "@testing-library/react"; import { IState, reducer, RovingTabIndexProvider, RovingTabIndexWrapper, Type, useRovingTabIndex, } from "../../src/accessibility/RovingTabIndex"; const Button = (props) => { const [onFocus, isActive, ref] = useRovingTabIndex(); return ; const button2 = ; const button3 = ; const button4 = ; // mock offsetParent Object.defineProperty(HTMLElement.prototype, "offsetParent", { get() { return this.parentNode; }, }); describe("RovingTabIndex", () => { it("RovingTabIndexProvider renders children as expected", () => { const { container } = render( {() => (
Test
)}
, ); expect(container.textContent).toBe("Test"); expect(container.innerHTML).toBe("
Test
"); }); it("RovingTabIndexProvider works as expected with useRovingTabIndex", () => { const { container, rerender } = render( {() => ( {button1} {button2} {button3} )} , ); // should begin with 0th being active checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]); // focus on 2nd button and test it is the only active one container.querySelectorAll("button")[2].focus(); checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0]); // focus on 1st button and test it is the only active one container.querySelectorAll("button")[1].focus(); checkTabIndexes(container.querySelectorAll("button"), [-1, 0, -1]); // check that the active button does not change even on an explicit blur event container.querySelectorAll("button")[1].blur(); checkTabIndexes(container.querySelectorAll("button"), [-1, 0, -1]); // update the children, it should remain on the same button rerender( {() => ( {button1} {button4} {button2} {button3} )} , ); checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0, -1]); // update the children, remove the active button, it should move to the next one rerender( {() => ( {button1} {button4} {button3} )} , ); checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0]); }); it("RovingTabIndexProvider works as expected with RovingTabIndexWrapper", () => { const { container } = render( {() => ( {button1} {button2} {({ onFocus, isActive, ref }) => ( )} )} , ); // should begin with 0th being active checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]); // focus on 2nd button and test it is the only active one container.querySelectorAll("button")[2].focus(); checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0]); }); describe("reducer functions as expected", () => { it("SetFocus works as expected", () => { const ref1 = React.createRef(); const ref2 = React.createRef(); 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(); const ref2 = React.createRef(); const ref3 = React.createRef(); const ref4 = React.createRef(); 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(); const ref2 = React.createRef(); const ref3 = React.createRef(); const ref4 = React.createRef(); render( , ); 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], }); }); }); });