playwright/tests/config/coverage.js

99 lines
3.7 KiB
JavaScript

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