112 lines
3.9 KiB
JavaScript
112 lines
3.9 KiB
JavaScript
/**
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* Copyright 2017 Google Inc. All rights reserved.
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* Modifications copyright (c) Microsoft Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @param {Map<string, boolean>} apiCoverage
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* @param {Object} events
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* @param {string} className
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* @param {!Object} classType
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*/
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function traceAPICoverage(apiCoverage, api, events) {
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const uninstalls = [];
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for (const [name, classType] of Object.entries(api)) {
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const className = name.substring(0, 1).toLowerCase() + name.substring(1);
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for (const methodName of Reflect.ownKeys(classType.prototype)) {
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const method = Reflect.get(classType.prototype, methodName);
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if (methodName === 'constructor' || typeof methodName !== 'string' || methodName.startsWith('_') || typeof method !== 'function')
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continue;
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apiCoverage.set(`${className}.${methodName}`, false);
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const override = function(...args) {
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apiCoverage.set(`${className}.${methodName}`, true);
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return method.call(this, ...args);
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};
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Object.defineProperty(override, 'name', { writable: false, value: methodName });
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Reflect.set(classType.prototype, methodName, override);
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uninstalls.push(() => Reflect.set(classType.prototype, methodName, method));
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}
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if (events[name]) {
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const emitClassType = (name === 'BrowserContext' ? api['ChromiumBrowserContext'] : undefined) || classType;
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for (const event of Object.values(events[name])) {
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if (typeof event !== 'symbol')
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apiCoverage.set(`${className}.emit(${JSON.stringify(event)})`, false);
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}
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const method = Reflect.get(emitClassType.prototype, 'emit');
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Reflect.set(emitClassType.prototype, 'emit', function(event, ...args) {
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if (typeof event !== 'symbol' && this.listenerCount(event))
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apiCoverage.set(`${className}.emit(${JSON.stringify(event)})`, true);
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return method.call(this, event, ...args);
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});
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uninstalls.push(() => Reflect.set(emitClassType.prototype, 'emit', method));
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}
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}
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return () => uninstalls.forEach(u => u());
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}
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/**
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* @param {string} browserName
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*/
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function apiForBrowser(browserName) {
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const BROWSER_CONFIGS = [
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{
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name: 'Firefox',
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events: require('../../lib/events').Events,
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},
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{
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name: 'WebKit',
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events: require('../../lib/events').Events,
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},
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{
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name: 'Chromium',
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events: {
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...require('../../lib/events').Events,
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...require('../../lib/chromium/events').Events,
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}
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},
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];
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const browserConfig = BROWSER_CONFIGS.find(config => config.name.toLowerCase() === browserName);
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const events = browserConfig.events;
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// TODO: we should rethink our api.ts approach to ensure coverage and async stacks.
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const api = {
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...require('../../lib/rpc/client/api'),
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};
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const filteredKeys = Object.keys(api).filter(apiName => {
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return !BROWSER_CONFIGS.some(config => apiName.startsWith(config.name)) || apiName.startsWith(browserConfig.name);
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});
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const filteredAPI = {};
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for (const key of filteredKeys)
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filteredAPI[key] = api[key];
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return {
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api: filteredAPI,
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events
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}
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}
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/**
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* @param {string} browserName
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*/
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function installCoverageHooks(browserName) {
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const {api, events} = apiForBrowser(browserName);
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const coverage = new Map();
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const uninstall = traceAPICoverage(coverage, api, events);
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return {coverage, uninstall};
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}
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module.exports = {
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installCoverageHooks
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};
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