mediawiki-extensions-CodeMirror/tests/jest/codemirror.test.js

import { EditorView } from '@codemirror/view';
import CodeMirror from '../../src/codemirror.js';
const $textarea = $( '<textarea>' ),
	cm = new CodeMirror( $textarea );

describe( 'initialize', () => {
	const initializeWithForm = () => {
		const form = document.createElement( 'form' );
		form.append( cm.$textarea[ 0 ] );
		cm.$textarea[ 0 ].form.addEventListener = jest.fn();
		cm.initialize();
	};

	it( 'should create the EditorState with the value of the textarea', () => {
		cm.$textarea.val( 'foobar' );
		cm.$textarea.textSelection = jest.fn().mockReturnValue( 'foobar' );
		cm.initialize();
		expect( cm.view.state.doc.toString() ).toStrictEqual( 'foobar' );
	} );

	it( 'should set the height to the same as the textarea', () => {
		$textarea.css( 'height', '100px' );
		cm.initialize();
		// 100 + 6 (padding/border) = 106
		expect( $( cm.view.dom ).height() ).toStrictEqual( 106 );
	} );

	it( 'should instantiate an EditorView and add .cm-editor to the DOM', () => {
		initializeWithForm();
		expect( cm.view ).toBeInstanceOf( EditorView );
		expect( cm.view.dom ).toBeInstanceOf( HTMLDivElement );
		expect( cm.$textarea[ 0 ].nextSibling ).toStrictEqual( cm.view.dom );
	} );

	it( 'should hide the native textarea', () => {
		cm.initialize();
		expect( cm.$textarea[ 0 ].style.display ).toStrictEqual( 'none' );
	} );

	it( 'should add a listener for form submission', () => {
		initializeWithForm();
		expect( cm.$textarea[ 0 ].form.addEventListener ).toHaveBeenCalledTimes( 1 );
	} );

	it( 'should retain the mw-editfont- class present on the textarea', () => {
		cm.$textarea.addClass( 'mw-editfont-monospace' );
		cm.initialize();
		expect( cm.view.dom.querySelector( '.cm-content' ).classList ).toContain( 'mw-editfont-monospace' );
	} );

	it( "should copy the 'dir' and 'lang' attributes of the textarea to .cm-editor", () => {
		cm.$textarea.prop( 'dir', 'rtl' )
			.prop( 'lang', 'ar' );
		cm.initialize();
		expect( cm.view.dom.getAttribute( 'dir' ) ).toStrictEqual( 'rtl' );
		expect( cm.view.dom.getAttribute( 'lang' ) ).toStrictEqual( 'ar' );
	} );
} );

describe( 'logUsage', () => {
	it( 'should track usage of CodeMirror with the correct data', () => {
		cm.logUsage( {
			editor: 'wikitext',
			enabled: true,
			toggled: false
		} );
		expect( mw.track ).toBeCalledWith( 'event.CodeMirrorUsage', {
			editor: 'wikitext',
			enabled: true,
			// eslint-disable-next-line camelcase
			session_token: 'abc',
			toggled: false,
			// eslint-disable-next-line camelcase
			user_edit_count_bucket: '1000+ edits',
			// eslint-disable-next-line camelcase
			user_id: 123
		} );
	} );
} );

describe( 'setCodeMirrorPreference', () => {
	beforeEach( () => {
		cm.initialize();
	} );

	it( 'should save using the API with the correct value', () => {
		cm.setCodeMirrorPreference( true );
		expect( mw.Api.prototype.saveOption ).toHaveBeenCalledWith( 'usecodemirror', 1 );
		expect( mw.user.options.set ).toHaveBeenCalledWith( 'usecodemirror', 1 );
	} );

	it( 'should not save preferences if the user is not named', () => {
		mw.user.isNamed = jest.fn().mockReturnValue( false );
		cm.setCodeMirrorPreference( true );
		expect( mw.Api.prototype.saveOption ).toHaveBeenCalledTimes( 0 );
		expect( mw.user.options.set ).toHaveBeenCalledTimes( 0 );
	} );
} );