/********************************************************************************
 * Copyright (C) 2018 Ericsson and others.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the Eclipse
 * Public License v. 2.0 are satisfied: GNU General Public License, version 2
 * with the GNU Classpath Exception which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 ********************************************************************************/ import { Emitter } from '../../../common' ; import { PreferenceChange } from '../preference-service' ; export function createMockPreferenceProxy ( preferences ) { const unsupportedOperation = ( _ , __ ) => { throw new Error ( 'Unsupported operation' ) ; } ; return new Proxy ( { } , { get : ( _ , property ) => { if ( property === 'onPreferenceChanged' ) { return new Emitter < PreferenceChange > ( ) . event ; } if ( property === 'dispose' ) { return ( ) => { } ; } if ( property === 'ready' ) { return Promise . resolve ( ) ; } if ( preferences [ property ] !== undefined && preferences [ property ] !== null ) { return preferences [ property ] ; } return undefined ; } , ownKeys : ( ) => [ ] , getOwnPropertyDescriptor : ( _ , property ) => ( { } ) , set : unsupportedOperation , deleteProperty : unsupportedOperation , defineProperty : unsupportedOperation } ) ; }