playwright/test/apicoverage.spec.js
2020-04-07 22:04:23 -07:00

104 lines
4.1 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.
*/
/**
* @param {Map<string, boolean>} apiCoverage
* @param {Object} events
* @param {string} className
* @param {!Object} classType
*/
function traceAPICoverage(apiCoverage, events, className, classType) {
className = className.substring(0, 1).toLowerCase() + className.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);
Reflect.set(classType.prototype, methodName, function(...args) {
apiCoverage.set(`${className}.${methodName}`, true);
return method.call(this, ...args);
});
}
if (events[classType.name]) {
for (const event of Object.values(events[classType.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);
});
}
}
module.exports.describe = function({browserType}) {
describe('**API COVERAGE**', () => {
const BROWSER_CONFIGS = [
{
name: 'Firefox',
events: require('../lib/events').Events,
missingCoverage: ['browserContext.setGeolocation', 'browserContext.setOffline', 'cDPSession.send', 'cDPSession.detach'],
},
{
name: 'WebKit',
events: require('../lib/events').Events,
missingCoverage: ['browserContext.clearPermissions', 'cDPSession.send', 'cDPSession.detach'],
},
{
name: 'Chromium',
events: {
...require('../lib/events').Events,
...require('../lib/chromium/events').Events,
},
missingCoverage: [],
},
];
const browserConfig = BROWSER_CONFIGS.find(config => config.name.toLowerCase() === browserType.name());
const events = browserConfig.events;
const api = require('../lib/api');
const coverage = new Map();
Object.keys(api).forEach(apiName => {
if (BROWSER_CONFIGS.some(config => apiName.startsWith(config.name)) && !apiName.startsWith(browserConfig.name))
return;
traceAPICoverage(coverage, events, apiName, api[apiName]);
});
it('should call all API methods', () => {
const ignoredMethods = new Set(browserConfig.missingCoverage);
const missingMethods = [];
const extraIgnoredMethods = [];
for (const method of coverage.keys()) {
// Sometimes we already have a background page while launching, before adding a listener.
if (method === 'chromiumBrowserContext.emit("backgroundpage")')
continue;
if (!coverage.get(method) && !ignoredMethods.has(method))
missingMethods.push(method);
else if (coverage.get(method) && ignoredMethods.has(method))
extraIgnoredMethods.push(method);
}
if (extraIgnoredMethods.length)
throw new Error('Certain API Methods are called and should not be ignored: ' + extraIgnoredMethods.join(', '));
if (missingMethods.length)
throw new Error('Certain API Methods are not called: ' + missingMethods.join(', '));
});
});
};