hooks/pre-test.js

 /********************************************************************************
 * Copyright (c) 2020 Contributors to the Eclipse Foundation
 *
 * See the NOTICE file(s) distributed with this work for additional
 * information regarding copyright ownership.
 *
 * 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.
 *
 * SPDX-License-Identifier: EPL-2.0
 ********************************************************************************/
var fs = require('fs-extra');

function setEnvironment(configPath, environment) {
  fs.writeJson(configPath, {env: environment},
    function (res) {
      console.log('Environment variable set to ' + environment)
    }
  );
}

// Set environment variable to "test"
setEnvironment('./config/env.json', 'test');