perfrunner-core
Version:
Automated UI performance test tool to measure performance changes for the web apps and sites
61 lines (60 loc) • 3.54 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.extractResourceData = exports.subsetTrace = exports.Tracer = void 0;
const fs_1 = require("fs");
const path_1 = require("path");
const usedEvents = ['ResourceFinish', 'ResourceSendRequest', 'ResourceReceiveResponse'];
class Tracer {
constructor(_outputFolder) {
this._outputFolder = _outputFolder;
this.start = (page) => __awaiter(this, void 0, void 0, function* () {
this._page = page;
const traceName = this.generateTraceName();
const outputTo = (0, path_1.join)(this._outputFolder, 'traces');
this.ensureFolderCreated(outputTo);
this._path = this.generateTracePath(outputTo, traceName);
yield page.tracing.start({ path: this._path });
});
this.stop = () => __awaiter(this, void 0, void 0, function* () {
if (this._page == null || this._path == null) {
throw new Error('Page for tracing is null or undefined. Maybe you forget to start tracing before calling stop tracing');
}
yield this._page.tracing.stop();
const tracing = JSON.parse((0, fs_1.readFileSync)(this._path, { encoding: 'utf8' }));
return tracing;
});
this.generateTracePath = (folder, traceName) => (0, path_1.join)(folder, traceName);
this.generateTraceName = () => `${new Date().toISOString().replace(/[:.]/g, '-')}.json`;
}
ensureFolderCreated(path) {
if (!(0, fs_1.existsSync)(path)) {
(0, fs_1.mkdirSync)(path, { recursive: true });
}
}
}
exports.Tracer = Tracer;
function subsetTrace(trc) {
return trc.filter((x) => x.cat === 'devtools.timeline' && x.args.data != null && usedEvents.includes(x.name));
}
exports.subsetTrace = subsetTrace;
function extractResourceData(url, trace) {
var _a;
const sendRequest = trace.find((event) => { var _a; return event.name === 'ResourceSendRequest' && ((_a = event.args.data) === null || _a === void 0 ? void 0 : _a.url) === url; });
if (sendRequest == null) {
return {};
}
const requestId = (_a = sendRequest.args.data) === null || _a === void 0 ? void 0 : _a.requestId;
const receiveResponse = trace.find((event) => { var _a, _b; return event.name === 'ResourceReceiveResponse' && ((_b = (_a = event.args) === null || _a === void 0 ? void 0 : _a.data) === null || _b === void 0 ? void 0 : _b.requestId) === requestId; });
const finish = trace.find((event) => { var _a; return event.name === 'ResourceFinish' && ((_a = event.args.data) === null || _a === void 0 ? void 0 : _a.requestId) === requestId; });
return { sendRequest, receiveResponse, finish };
}
exports.extractResourceData = extractResourceData;