wct-mocha/lib/environment.js

Client-side library for testing web-components with Mocha.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * @license
 * Copyright (c) 2018 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at
 * http://polymer.github.io/LICENSE.txt The complete set of authors may be found
 * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may
 * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by
 * Google as part of the polymer project is also subject to an additional IP
 * rights grant found at http://polymer.github.io/PATENTS.txt
 */
var config = require("./config.js");
var reporters = require("./reporters.js");
var util = require("./util.js");
var policy = {
    createHTML: function (v) {
        return v;
    }
};
if (window.trustedTypes) {
    policy = window.trustedTypes.createPolicy('wct-mocha-init', policy);
}
/**
 * Loads all environment scripts ...synchronously ...after us.
 */
function loadSync() {
    util.debug('Loading environment scripts:');
    var a11ySuiteScriptPath = 'web-component-tester/data/a11ySuite.js';
    var scripts = config.get('environmentScripts');
    var a11ySuiteWillBeLoaded = window.__generatedByWct || scripts.indexOf(a11ySuiteScriptPath) > -1;
    // We can't inject a11ySuite when running the npm version because it is a
    // module-based script that needs `<script type=module>` and compilation
    // for browsers without module support.
    if (!a11ySuiteWillBeLoaded && window.__wctUseNpm === false) {
        // wct is running as a bower dependency, load a11ySuite from data/
        scripts.push(a11ySuiteScriptPath);
    }
    scripts.forEach(function (path) {
        var url = util.expandUrl(path, config.get('root'));
        util.debug('Loading environment script:', url);
        // Synchronous load.
        document.write(policy.createHTML("<script src=\"" + encodeURI(url) + "\"></script>"));
    });
    util.debug('Environment scripts loaded');
    var imports = config.get('environmentImports');
    imports.forEach(function (path) {
        var url = util.expandUrl(path, config.get('root'));
        util.debug('Loading environment import:', url);
        // Synchronous load.
        document.write(policy.createHTML("<link rel=\"import\" href=\"" + encodeURI(url) + "\">"));
    });
    util.debug('Environment imports loaded');
}
exports.loadSync = loadSync;
/**
 * We have some hard dependencies on things that should be loaded via
 * `environmentScripts`, so we assert that they're present here; and do any
 * post-facto setup.
 */
function ensureDependenciesPresent() {
    _ensureMocha();
    _checkChai();
}
exports.ensureDependenciesPresent = ensureDependenciesPresent;
function _ensureMocha() {
    var Mocha = window.Mocha;
    if (!Mocha) {
        throw new Error('WCT requires Mocha. Please ensure that it is present in WCT.environmentScripts, or that you load it before loading web-component-tester/browser.js');
    }
    reporters.injectMocha(Mocha);
    // Magic loading of mocha's stylesheet
    var mochaPrefix = util.scriptPrefix('mocha.js');
    // only load mocha stylesheet for the test runner output
    // Not the end of the world, if it doesn't load.
    if (mochaPrefix && window.top === window.self) {
        util.loadStyle(mochaPrefix + 'mocha.css');
    }
}
function _checkChai() {
    if (!window.chai) {
        util.debug('Chai not present; not registering shorthands');
        return;
    }
    window.assert = window.chai.assert;
    window.expect = window.chai.expect;
}
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