"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const callsite_1 = __importDefault(require("callsite"));
const events_1 = require("events");
const TRACKING_MARK_RE = /^\$\$testcafe_test_run\$\$(\S+)\$\$$/;
const STACK_CAPACITY = 5000;
class TestRunTracker extends events_1.EventEmitter {
    constructor() {
        super();
        this.enabled = false;
        this.activeTestRuns = {};
    }
    _createContextSwitchingFunctionHook(ctxSwitchingFn, patchedArgsCount) {
        const tracker = this;
        return function () {
            const testRunId = tracker.getContextTestRunId();
            if (testRunId) {
                for (let i = 0; i < patchedArgsCount; i++) {
                    if (typeof arguments[i] === 'function')
                        arguments[i] = tracker.addTrackingMarkerToFunction(testRunId, arguments[i]);
                }
            }
            // @ts-ignore
            return ctxSwitchingFn.apply(this, arguments);
        };
    }
    _getStackFrames() {
        // NOTE: increase stack capacity to seek deep stack entries
        const savedLimit = Error.stackTraceLimit;
        Error.stackTraceLimit = STACK_CAPACITY;
        const frames = (0, callsite_1.default)();
        Error.stackTraceLimit = savedLimit;
        return frames;
    }
    getMarkedFnName(testRunId) {
        return `$$testcafe_test_run$$${testRunId}$$`;
    }
    ensureEnabled() {
        if (!this.enabled) {
            global.setTimeout = this._createContextSwitchingFunctionHook(global.setTimeout, 1);
            global.setInterval = this._createContextSwitchingFunctionHook(global.setInterval, 1);
            global.setImmediate = this._createContextSwitchingFunctionHook(global.setImmediate, 1);
            process.nextTick = this._createContextSwitchingFunctionHook(process.nextTick, 1);
            global.Promise.prototype.then = this._createContextSwitchingFunctionHook(global.Promise.prototype.then, 2);
            global.Promise.prototype.catch = this._createContextSwitchingFunctionHook(global.Promise.prototype.catch, 1);
            this.enabled = true;
        }
    }
    addTrackingMarkerToFunction(testRunId, fn, context) {
        const markerFactoryBody = `
            return function ${this.getMarkedFnName(testRunId)} () {
                context = context || this;
                switch (arguments.length) {
                    case 0: return fn.call(context);
                    case 1: return fn.call(context, arguments[0]);
                    case 2: return fn.call(context, arguments[0], arguments[1]);
                    case 3: return fn.call(context, arguments[0], arguments[1], arguments[2]);
                    case 4: return fn.call(context, arguments[0], arguments[1], arguments[2], arguments[3]);
                    default: return fn.apply(context, arguments);
                }
            };
        `;
        return new Function('fn', 'context', markerFactoryBody)(fn, context);
    }
    getContextTestRunId() {
        const frames = this._getStackFrames();
        // OPTIMIZATION: we start traversing from the bottom of the stack,
        // because we'll more likely encounter a marker there.
        // Async/await and Promise machinery executes lots of intrinsics
        // on timers (where we have a marker). And, since a timer initiates a new
        // stack, the marker will be at the very bottom of it.
        for (let i = frames.length - 1; i >= 0; i--) {
            const fnName = frames[i].getFunctionName();
            const match = fnName && fnName.match(TRACKING_MARK_RE);
            if (match)
                return match[1];
        }
        return null;
    }
    resolveContextTestRun() {
        const testRunId = this.getContextTestRunId();
        if (testRunId)
            return this.activeTestRuns[testRunId];
        return null;
    }
    addActiveTestRun(testRun) {
        this.activeTestRuns[testRun.id] = testRun;
        testRun.onAny((eventName, eventData) => this.emit(eventName, { testRun, data: eventData }));
    }
    removeActiveTestRun(id) {
        delete this.activeTestRuns[id];
    }
}
// Tracker
exports.default = new TestRunTracker();
module.exports = exports.default;
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i < patchedArgsCount; i++) {\n                    if (typeof arguments[i] === 'function')\n                        arguments[i] = tracker.addTrackingMarkerToFunction(testRunId, arguments[i]);\n                }\n            }\n\n            // @ts-ignore\n            return ctxSwitchingFn.apply(this, arguments);\n        };\n    }\n\n    private _getStackFrames (): getStackFrames.CallSite[] {\n        // NOTE: increase stack capacity to seek deep stack entries\n        const savedLimit = Error.stackTraceLimit;\n\n        Error.stackTraceLimit = STACK_CAPACITY;\n\n        const frames = getStackFrames();\n\n        Error.stackTraceLimit = savedLimit;\n\n        return frames;\n    }\n\n    public getMarkedFnName (testRunId: string): string {\n        return `$$testcafe_test_run$$${testRunId}$$`;\n    }\n\n    public ensureEnabled (): void {\n        if (!this.enabled) {\n            global.setTimeout   = this._createContextSwitchingFunctionHook(global.setTimeout, 1);\n            global.setInterval  = this._createContextSwitchingFunctionHook(global.setInterval, 1);\n            global.setImmediate = this._createContextSwitchingFunctionHook(global.setImmediate, 1);\n            process.nextTick    = this._createContextSwitchingFunctionHook(process.nextTick, 1);\n\n            global.Promise.prototype.then  = this._createContextSwitchingFunctionHook(global.Promise.prototype.then, 2);\n            global.Promise.prototype.catch = this._createContextSwitchingFunctionHook(global.Promise.prototype.catch, 1);\n\n            this.enabled = true;\n        }\n    }\n\n    public addTrackingMarkerToFunction (testRunId: string, fn: Function, context?: any): Function {\n        const markerFactoryBody = `\n            return function ${ this.getMarkedFnName(testRunId) } () {\n                context = context || this;\n                switch (arguments.length) {\n                    case 0: return fn.call(context);\n                    case 1: return fn.call(context, arguments[0]);\n                    case 2: return fn.call(context, arguments[0], arguments[1]);\n                    case 3: return fn.call(context, arguments[0], arguments[1], arguments[2]);\n                    case 4: return fn.call(context, arguments[0], arguments[1], arguments[2], arguments[3]);\n                    default: return fn.apply(context, arguments);\n                }\n            };\n        `;\n\n        return new Function('fn', 'context', markerFactoryBody)(fn, context);\n    }\n\n    public getContextTestRunId (): string | null {\n        const frames = this._getStackFrames();\n\n        // OPTIMIZATION: we start traversing from the bottom of the stack,\n        // because we'll more likely encounter a marker there.\n        // Async/await and Promise machinery executes lots of intrinsics\n        // on timers (where we have a marker). And, since a timer initiates a new\n        // stack, the marker will be at the very bottom of it.\n        for (let i = frames.length - 1; i >= 0; i--) {\n            const fnName = frames[i].getFunctionName();\n            const match  = fnName && fnName.match(TRACKING_MARK_RE);\n\n            if (match)\n                return match[1];\n        }\n\n        return null;\n    }\n\n    public resolveContextTestRun (): TestRun | TestRunProxy | null {\n        const testRunId = this.getContextTestRunId();\n\n        if (testRunId)\n            return this.activeTestRuns[testRunId];\n\n        return null;\n    }\n\n    public addActiveTestRun (testRun: TestRun | TestRunProxy): void {\n        this.activeTestRuns[testRun.id] = testRun;\n\n        testRun.onAny((eventName: string, eventData: unknown) => this.emit(eventName, { testRun, data: eventData }));\n    }\n\n    public removeActiveTestRun (id: string): void {\n        delete this.activeTestRuns[id];\n    }\n}\n\n// Tracker\nexport default new TestRunTracker();\n"]}