mediawiki-skins-Vector/tests/jest/tableOfContents.test.js
Nicholas Ray 8295148ae2 Add Jest tests for TOC before/after edit
* Also increase code coverage threshold

Bug: T316571
Change-Id: I6eb703bd0d23ff9d038c989562d07ec01cb7b1c8
2022-09-19 16:40:38 -06:00

361 lines
12 KiB
JavaScript

const mustache = require( 'mustache' );
const fs = require( 'fs' );
const tableOfContentsTemplate = fs.readFileSync( 'includes/templates/TableOfContents.mustache', 'utf8' );
const tableOfContentsLineTemplate = fs.readFileSync( 'includes/templates/TableOfContents__line.mustache', 'utf8' );
const initTableOfContents = require( '../../resources/skins.vector.es6/tableOfContents.js' );
let /** @type {HTMLElement} */ fooSection,
/** @type {HTMLElement} */ barSection,
/** @type {HTMLElement} */ bazSection,
/** @type {HTMLElement} */ quxSection,
/** @type {HTMLElement} */ quuxSection;
const onHeadingClick = jest.fn();
const onToggleClick = jest.fn();
const onToggleCollapse = jest.fn();
const SECTIONS = [
{
toclevel: 1,
number: '1',
line: 'foo',
anchor: 'foo',
'is-top-level-section': true,
'is-parent-section': false,
'array-sections': null
}, {
toclevel: 1,
number: '2',
line: 'bar',
anchor: 'bar',
'is-top-level-section': true,
'is-parent-section': true,
'vector-button-label': 'Toggle bar subsection',
'array-sections': [ {
toclevel: 2,
number: '2.1',
line: 'baz',
anchor: 'baz',
'is-top-level-section': false,
'is-parent-section': true,
'array-sections': [ {
toclevel: 3,
number: '2.1.1',
line: 'qux',
anchor: 'qux',
'is-top-level-section': false,
'is-parent-section': false,
'array-sections': null
} ]
} ]
}, {
toclevel: 1,
number: '3',
line: 'quux',
anchor: 'quux',
'is-top-level-section': true,
'is-parent-section': false,
'array-sections': null
}
];
/**
* @param {Object} templateProps
* @return {string}
*/
function render( templateProps = {} ) {
const templateData = Object.assign( {
'is-vector-toc-beginning-enabled': true,
'msg-vector-toc-beginning': 'Beginning',
'msg-vector-toc-heading': 'Contents',
'vector-is-collapse-sections-enabled': false,
'array-sections': SECTIONS
}, templateProps );
return mustache.render( tableOfContentsTemplate, templateData, {
TableOfContents__line: tableOfContentsLineTemplate // eslint-disable-line camelcase
} );
}
/**
* @param {Object} templateProps
* @return {module:TableOfContents~TableOfContents}
*/
function mount( templateProps = {} ) {
document.body.innerHTML = render( templateProps );
const toc = initTableOfContents( {
container: /** @type {HTMLElement} */ ( document.getElementById( 'mw-panel-toc' ) ),
onHeadingClick,
onToggleClick,
onToggleCollapse
} );
fooSection = /** @type {HTMLElement} */ ( document.getElementById( 'toc-foo' ) );
barSection = /** @type {HTMLElement} */ ( document.getElementById( 'toc-bar' ) );
bazSection = /** @type {HTMLElement} */ ( document.getElementById( 'toc-baz' ) );
quxSection = /** @type {HTMLElement} */ ( document.getElementById( 'toc-qux' ) );
quuxSection = /** @type {HTMLElement} */ ( document.getElementById( 'toc-quux' ) );
return toc;
}
describe( 'Table of contents', () => {
beforeEach( () => {
// @ts-ignore
global.window.matchMedia = jest.fn( () => ( {} ) );
} );
describe( 'renders', () => {
test( 'when `vector-is-collapse-sections-enabled` is false', () => {
const toc = mount();
expect( document.body.innerHTML ).toMatchSnapshot();
expect( barSection.classList.contains( toc.EXPANDED_SECTION_CLASS ) ).toEqual( true );
} );
test( 'when `vector-is-collapse-sections-enabled` is true', () => {
const toc = mount( { 'vector-is-collapse-sections-enabled': true } );
expect( document.body.innerHTML ).toMatchSnapshot();
expect( barSection.classList.contains( toc.EXPANDED_SECTION_CLASS ) ).toEqual( false );
} );
test( 'toggles for top level parent sections', () => {
const toc = mount();
expect( fooSection.getElementsByClassName( toc.TOGGLE_CLASS ).length ).toEqual( 0 );
expect( barSection.getElementsByClassName( toc.TOGGLE_CLASS ).length ).toEqual( 1 );
expect( bazSection.getElementsByClassName( toc.TOGGLE_CLASS ).length ).toEqual( 0 );
expect( quxSection.getElementsByClassName( toc.TOGGLE_CLASS ).length ).toEqual( 0 );
expect( quuxSection.getElementsByClassName( toc.TOGGLE_CLASS ).length ).toEqual( 0 );
} );
} );
describe( 'binds event listeners', () => {
test( 'for onHeadingClick', () => {
const toc = mount();
const heading = /** @type {HTMLElement} */ ( document.querySelector( `#toc-foo .${toc.LINK_CLASS}` ) );
heading.click();
expect( onToggleClick ).not.toBeCalled();
expect( onHeadingClick ).toBeCalled();
} );
test( 'for onToggleClick', () => {
const toc = mount();
const toggle = /** @type {HTMLElement} */ ( document.querySelector( `#toc-bar .${toc.TOGGLE_CLASS}` ) );
toggle.click();
expect( onHeadingClick ).not.toBeCalled();
expect( onToggleClick ).toBeCalled();
} );
} );
describe( 'applies correct classes', () => {
test( 'when changing active sections', () => {
const toc = mount( { 'vector-is-collapse-sections-enabled': true } );
toc.changeActiveSection( 'toc-foo' );
expect( fooSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( true );
expect( barSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
expect( bazSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
expect( quxSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
expect( quuxSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
toc.changeActiveSection( 'toc-bar' );
expect( fooSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
expect( barSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( true );
expect( bazSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
expect( quxSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
expect( quuxSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
toc.changeActiveSection( 'toc-baz' );
expect( fooSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
expect( barSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( true );
expect( bazSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( true );
expect( quxSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
expect( quuxSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
toc.changeActiveSection( 'toc-qux' );
expect( fooSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
expect( barSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( true );
expect( bazSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
expect( quxSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( true );
expect( quuxSection.classList.contains( toc.ACTIVE_SECTION_CLASS ) ).toEqual( false );
} );
test( 'when expanding sections', () => {
const toc = mount();
toc.expandSection( 'toc-bar' );
expect( barSection.classList.contains( toc.EXPANDED_SECTION_CLASS ) ).toEqual( true );
} );
test( 'when toggling sections', () => {
const toc = mount();
toc.toggleExpandSection( 'toc-bar' );
expect( barSection.classList.contains( toc.EXPANDED_SECTION_CLASS ) ).toEqual( false );
toc.toggleExpandSection( 'toc-bar' );
expect( barSection.classList.contains( toc.EXPANDED_SECTION_CLASS ) ).toEqual( true );
} );
} );
describe( 'applies the correct aria attributes', () => {
test( 'when initialized', () => {
const spy = jest.spyOn( mw, 'hook' );
const toc = mount();
const toggleButton = /** @type {HTMLElement} */ ( barSection.querySelector( `.${toc.TOGGLE_CLASS}` ) );
expect( toggleButton.getAttribute( 'aria-expanded' ) ).toEqual( 'true' );
expect( spy ).toBeCalledWith( 'wikipage.tableOfContents' );
} );
test( 'when expanding sections', () => {
const toc = mount();
const toggleButton = /** @type {HTMLElement} */ ( barSection.querySelector( `.${toc.TOGGLE_CLASS}` ) );
toc.expandSection( 'toc-bar' );
expect( toggleButton.getAttribute( 'aria-expanded' ) ).toEqual( 'true' );
} );
test( 'when toggling sections', () => {
const toc = mount();
const toggleButton = /** @type {HTMLElement} */ ( barSection.querySelector( `.${toc.TOGGLE_CLASS}` ) );
toc.toggleExpandSection( 'toc-bar' );
expect( toggleButton.getAttribute( 'aria-expanded' ) ).toEqual( 'false' );
toc.toggleExpandSection( 'toc-bar' );
expect( toggleButton.getAttribute( 'aria-expanded' ) ).toEqual( 'true' );
} );
} );
describe( 're-rendering', () => {
const mockMwHook = () => {
/** @type {Function} */
let callback;
// @ts-ignore
jest.spyOn( mw, 'hook' ).mockImplementation( () => {
return {
add: function ( fn ) {
callback = fn;
return this;
},
fire: ( data ) => {
if ( callback ) {
callback( data );
}
}
};
} );
};
afterEach( () => {
jest.restoreAllMocks();
} );
test( 'listens to wikipage.tableOfContents hook when mounted', () => {
const spy = jest.spyOn( mw, 'hook' );
mount();
expect( spy ).toHaveBeenCalledWith( 'wikipage.tableOfContents' );
} );
test( 're-renders toc when wikipage.tableOfContents hook is fired with empty sections', () => {
mockMwHook();
mount();
mw.hook( 'wikipage.tableOfContents' ).fire( [] );
expect( document.body.innerHTML ).toMatchSnapshot();
} );
test( 're-renders toc when wikipage.tableOfContents hook is fired with sections', async () => {
mockMwHook();
// @ts-ignore
// eslint-disable-next-line compat/compat
jest.spyOn( mw.loader, 'using' ).mockImplementation( () => Promise.resolve() );
// @ts-ignore
mw.template.getCompiler = () => {};
jest.spyOn( mw, 'message' ).mockImplementation( ( msg ) => {
const msgFactory = ( /** @type {string} */ text ) => {
return {
parse: () => '',
plain: () => '',
escaped: () => '',
exists: () => true,
text: () => text
};
};
switch ( msg ) {
case 'vector-toc-heading':
return msgFactory( 'Contents' );
case 'vector-toc-toggle-position-sidebar':
return msgFactory( 'move to sidebar' );
case 'vector-toc-toggle-position-title':
return msgFactory( 'hide' );
case 'vector-toc-beginning':
return msgFactory( 'Beginning' );
default:
return msgFactory( '' );
}
} );
// @ts-ignore
jest.spyOn( mw.template, 'getCompiler' ).mockImplementation( () => {
return {
compile: () => {
return {
render: ( /** @type {Object} */ data ) => {
return {
html: () => {
return render( data );
}
};
}
};
}
};
} );
const toc = mount();
const toggleButton = /** @type {HTMLElement} */ ( barSection.querySelector( `.${toc.TOGGLE_CLASS}` ) );
// Collapse section.
toc.toggleExpandSection( 'toc-bar' );
expect( toggleButton.getAttribute( 'aria-expanded' ) ).toEqual( 'false' );
// wikipage.tableOfContents includes the nested sections in the top level
// of the array.
mw.hook( 'wikipage.tableOfContents' ).fire( [
// foo
SECTIONS[ 0 ],
// bar
SECTIONS[ 1 ],
// baz
// @ts-ignore
SECTIONS[ 1 ][ 'array-sections' ][ 0 ],
// qux
// @ts-ignore
SECTIONS[ 1 ][ 'array-sections' ][ 0 ][ 'array-sections' ][ 0 ],
// quux
SECTIONS[ 2 ],
// Add new section to see how the re-render performs.
{
toclevel: 1,
number: '4',
line: 'bat',
anchor: 'bat',
'is-top-level-section': true,
'is-parent-section': false,
'array-sections': null
}
] );
// Wait until the mw.loader.using promise has resolved so that we can
// check the DOM after it has been updated.
// eslint-disable-next-line compat/compat
await Promise.resolve();
const newToggleButton = /** @type {HTMLElement} */ ( document.querySelector( `#toc-bar .${toc.TOGGLE_CLASS}` ) );
expect( newToggleButton ).not.toBeNull();
// Check that the sections render in their expanded form.
expect( newToggleButton.getAttribute( 'aria-expanded' ) ).toEqual( 'true' );
// Verify newly rendered TOC html matches the expected html.
expect( document.body.innerHTML ).toMatchSnapshot();
} );
} );
} );