chore(test runner): extract JobDispatcher (#26776)

This commit is contained in:
Dmitry Gozman 2023-09-21 17:13:00 -07:00 committed by GitHub
parent 51a774f8a3
commit ccaec034d8
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 305 additions and 291 deletions

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@ -20,32 +20,23 @@ import type { TestResult, TestStep, TestError } from '../../types/testReporter';
import type { Suite } from '../common/test';
import type { ProcessExitData } from './processHost';
import type { TestCase } from '../common/test';
import { ManualPromise } from 'playwright-core/lib/utils';
import { ManualPromise, type RegisteredListener, eventsHelper } from 'playwright-core/lib/utils';
import { WorkerHost } from './workerHost';
import type { TestGroup } from './testGroups';
import type { FullConfigInternal } from '../common/config';
import type { ReporterV2 } from '../reporters/reporterV2';
import type { FailureTracker } from './failureTracker';
type TestResultData = {
result: TestResult;
steps: Map<string, TestStep>;
};
type TestData = {
test: TestCase;
resultByWorkerIndex: Map<number, TestResultData>;
};
export type EnvByProjectId = Map<string, Record<string, string | undefined>>;
export class Dispatcher {
private _workerSlots: { busy: boolean, worker?: WorkerHost }[] = [];
private _workerSlots: { busy: boolean, worker?: WorkerHost, jobDispatcher?: JobDispatcher }[] = [];
private _queue: TestGroup[] = [];
private _queuedOrRunningHashCount = new Map<string, number>();
private _finished = new ManualPromise<void>();
private _isStopped = true;
private _testById = new Map<string, TestData>();
private _allTests: TestCase[] = [];
private _config: FullConfigInternal;
private _reporter: ReporterV2;
private _failureTracker: FailureTracker;
@ -137,7 +128,11 @@ export class Dispatcher {
}
// 3. Run the job.
const result = await this._runJob(worker, job);
const stopCallback = () => this.stop().catch(() => {});
const jobDispatcher = new JobDispatcher(job, this._reporter, this._failureTracker, stopCallback);
this._workerSlots[index].jobDispatcher = jobDispatcher;
const result = await jobDispatcher.runInWorker(worker);
this._workerSlots[index].jobDispatcher = undefined;
this._updateCounterForWorkerHash(job.workerHash, -1);
// 4. When worker encounters error, we stop it and create a new one.
@ -166,7 +161,7 @@ export class Dispatcher {
if (this._workerSlots.some(w => w.busy))
return;
for (const { test } of this._testById.values()) {
for (const test of this._allTests) {
// Emulate skipped test run if we have stopped early.
if (!test.results.length)
test._appendTestResult().status = 'skipped';
@ -190,11 +185,9 @@ export class Dispatcher {
async run(testGroups: TestGroup[], extraEnvByProjectId: EnvByProjectId) {
this._extraEnvByProjectId = extraEnvByProjectId;
this._queue = testGroups;
for (const group of testGroups) {
this._allTests = testGroups.map(g => g.tests).flat();
for (const group of testGroups)
this._updateCounterForWorkerHash(group.workerHash, +1);
for (const test of group.tests)
this._testById.set(test.id, { test, resultByWorkerIndex: new Map() });
}
this._isStopped = false;
this._workerSlots = [];
// 0. Stop right away if we have reached max failures.
@ -212,266 +205,6 @@ export class Dispatcher {
await this._finished;
}
async _runJob(worker: WorkerHost, testGroup: TestGroup): Promise<{ newJob?: TestGroup, didFail: boolean }> {
const runPayload: RunPayload = {
file: testGroup.requireFile,
entries: testGroup.tests.map(test => {
return { testId: test.id, retry: test.results.length };
}),
};
worker.runTestGroup(runPayload);
const result = new ManualPromise<{ newJob?: TestGroup, didFail: boolean }>();
const doneWithJob = () => {
worker.removeListener('testBegin', onTestBegin);
worker.removeListener('testEnd', onTestEnd);
worker.removeListener('stepBegin', onStepBegin);
worker.removeListener('stepEnd', onStepEnd);
worker.removeListener('attach', onAttach);
worker.removeListener('done', onDone);
worker.removeListener('exit', onExit);
};
const remainingByTestId = new Map(testGroup.tests.map(e => [e.id, e]));
const failedTestIds = new Set<string>();
let runningTest = false;
const onTestBegin = (params: TestBeginPayload) => {
runningTest = true;
const data = this._testById.get(params.testId)!;
const result = data.test._appendTestResult();
data.resultByWorkerIndex.set(worker.workerIndex, { result, steps: new Map() });
result.parallelIndex = worker.parallelIndex;
result.workerIndex = worker.workerIndex;
result.startTime = new Date(params.startWallTime);
this._reporter.onTestBegin(data.test, result);
worker.currentTestId = params.testId;
};
worker.addListener('testBegin', onTestBegin);
const onTestEnd = (params: TestEndPayload) => {
runningTest = false;
remainingByTestId.delete(params.testId);
if (this._failureTracker.hasReachedMaxFailures()) {
// Do not show more than one error to avoid confusion, but report
// as interrupted to indicate that we did actually start the test.
params.status = 'interrupted';
params.errors = [];
}
const data = this._testById.get(params.testId)!;
const test = data.test;
const { result } = data.resultByWorkerIndex.get(worker.workerIndex)!;
data.resultByWorkerIndex.delete(worker.workerIndex);
result.duration = params.duration;
result.errors = params.errors;
result.error = result.errors[0];
result.status = params.status;
test.expectedStatus = params.expectedStatus;
test.annotations = params.annotations;
test.timeout = params.timeout;
const isFailure = result.status !== 'skipped' && result.status !== test.expectedStatus;
if (isFailure)
failedTestIds.add(params.testId);
this._reportTestEnd(test, result);
worker.currentTestId = null;
};
worker.addListener('testEnd', onTestEnd);
const onStepBegin = (params: StepBeginPayload) => {
const data = this._testById.get(params.testId)!;
const runData = data.resultByWorkerIndex.get(worker.workerIndex);
if (!runData) {
// The test has finished, but steps are still coming. Just ignore them.
return;
}
const { result, steps } = runData;
const parentStep = params.parentStepId ? steps.get(params.parentStepId) : undefined;
const step: TestStep = {
title: params.title,
titlePath: () => {
const parentPath = parentStep?.titlePath() || [];
return [...parentPath, params.title];
},
parent: parentStep,
category: params.category,
startTime: new Date(params.wallTime),
duration: -1,
steps: [],
location: params.location,
};
steps.set(params.stepId, step);
(parentStep || result).steps.push(step);
this._reporter.onStepBegin(data.test, result, step);
};
worker.on('stepBegin', onStepBegin);
const onStepEnd = (params: StepEndPayload) => {
const data = this._testById.get(params.testId)!;
const runData = data.resultByWorkerIndex.get(worker.workerIndex);
if (!runData) {
// The test has finished, but steps are still coming. Just ignore them.
return;
}
const { result, steps } = runData;
const step = steps.get(params.stepId);
if (!step) {
this._reporter.onStdErr('Internal error: step end without step begin: ' + params.stepId, data.test, result);
return;
}
step.duration = params.wallTime - step.startTime.getTime();
if (params.error)
step.error = params.error;
steps.delete(params.stepId);
this._reporter.onStepEnd(data.test, result, step);
};
worker.on('stepEnd', onStepEnd);
const onAttach = (params: AttachmentPayload) => {
const data = this._testById.get(params.testId)!;
const { result } = data.resultByWorkerIndex.get(worker.workerIndex)!;
const attachment = {
name: params.name,
path: params.path,
contentType: params.contentType,
body: params.body !== undefined ? Buffer.from(params.body, 'base64') : undefined
};
result.attachments.push(attachment);
};
worker.on('attach', onAttach);
const onDone = (params: DonePayload & { unexpectedExitError?: TestError }) => {
let remaining = [...remainingByTestId.values()];
// We won't file remaining if:
// - there are no remaining
// - we are here not because something failed
// - no unrecoverable worker error
if (!remaining.length && !failedTestIds.size && !params.fatalErrors.length && !params.skipTestsDueToSetupFailure.length && !params.fatalUnknownTestIds && !params.unexpectedExitError) {
doneWithJob();
result.resolve({ didFail: false });
return;
}
const massSkipTestsFromRemaining = (testIds: Set<string>, errors: TestError[], onlyStartedTests?: boolean) => {
remaining = remaining.filter(test => {
if (!testIds.has(test.id))
return true;
if (!this._failureTracker.hasReachedMaxFailures()) {
const data = this._testById.get(test.id)!;
const runData = data.resultByWorkerIndex.get(worker.workerIndex);
// There might be a single test that has started but has not finished yet.
let result: TestResult;
if (runData) {
result = runData.result;
} else {
if (onlyStartedTests && runningTest)
return true;
result = data.test._appendTestResult();
this._reporter.onTestBegin(test, result);
}
result.errors = [...errors];
result.error = result.errors[0];
result.status = errors.length ? 'failed' : 'skipped';
this._reportTestEnd(test, result);
failedTestIds.add(test.id);
errors = []; // Only report errors for the first test.
}
return false;
});
if (errors.length) {
// We had fatal errors after all tests have passed - most likely in some teardown.
// Let's just fail the test run.
this._failureTracker.onWorkerError();
for (const error of errors)
this._reporter.onError(error);
}
};
if (params.fatalUnknownTestIds) {
const titles = params.fatalUnknownTestIds.map(testId => {
const test = this._testById.get(testId)!.test;
return test.titlePath().slice(1).join(' > ');
});
massSkipTestsFromRemaining(new Set(params.fatalUnknownTestIds), [{
message: `Test(s) not found in the worker process. Make sure test titles do not change:\n${titles.join('\n')}`
}]);
}
if (params.fatalErrors.length) {
// In case of fatal errors, report first remaining test as failing with these errors,
// and all others as skipped.
massSkipTestsFromRemaining(new Set(remaining.map(test => test.id)), params.fatalErrors);
}
// Handle tests that should be skipped because of the setup failure.
massSkipTestsFromRemaining(new Set(params.skipTestsDueToSetupFailure), []);
// Handle unexpected worker exit.
if (params.unexpectedExitError)
massSkipTestsFromRemaining(new Set(remaining.map(test => test.id)), [params.unexpectedExitError], true /* onlyStartedTests */);
const retryCandidates = new Set<string>();
const serialSuitesWithFailures = new Set<Suite>();
for (const failedTestId of failedTestIds) {
retryCandidates.add(failedTestId);
let outermostSerialSuite: Suite | undefined;
for (let parent: Suite | undefined = this._testById.get(failedTestId)!.test.parent; parent; parent = parent.parent) {
if (parent._parallelMode === 'serial')
outermostSerialSuite = parent;
}
if (outermostSerialSuite)
serialSuitesWithFailures.add(outermostSerialSuite);
}
// We have failed tests that belong to a serial suite.
// We should skip all future tests from the same serial suite.
remaining = remaining.filter(test => {
let parent: Suite | undefined = test.parent;
while (parent && !serialSuitesWithFailures.has(parent))
parent = parent.parent;
// Does not belong to the failed serial suite, keep it.
if (!parent)
return true;
// Emulate a "skipped" run, and drop this test from remaining.
const result = test._appendTestResult();
this._reporter.onTestBegin(test, result);
result.status = 'skipped';
this._reportTestEnd(test, result);
return false;
});
for (const serialSuite of serialSuitesWithFailures) {
// Add all tests from faiiled serial suites for possible retry.
// These will only be retried together, because they have the same
// "retries" setting and the same number of previous runs.
serialSuite.allTests().forEach(test => retryCandidates.add(test.id));
}
for (const testId of retryCandidates) {
const pair = this._testById.get(testId)!;
if (pair.test.results.length < pair.test.retries + 1)
remaining.push(pair.test);
}
// This job is over, we will schedule another one.
doneWithJob();
const newJob = remaining.length ? { ...testGroup, tests: remaining } : undefined;
result.resolve({ didFail: true, newJob });
};
worker.on('done', onDone);
const onExit = (data: ProcessExitData) => {
const unexpectedExitError: TestError | undefined = data.unexpectedly ? {
message: `Internal error: worker process exited unexpectedly (code=${data.code}, signal=${data.signal})`
} : undefined;
onDone({ skipTestsDueToSetupFailure: [], fatalErrors: [], unexpectedExitError });
};
worker.on('exit', onExit);
return result;
}
_createWorker(testGroup: TestGroup, parallelIndex: number, loaderData: SerializedConfig) {
const projectConfig = this._config.projects.find(p => p.id === testGroup.projectId)!;
const outputDir = projectConfig.project.outputDir;
@ -484,10 +217,10 @@ export class Dispatcher {
// the next retry.
return { chunk };
}
if (!worker.currentTestId)
const currentlyRunning = this._workerSlots[parallelIndex].jobDispatcher?.currentlyRunning();
if (!currentlyRunning)
return { chunk };
const data = this._testById.get(worker.currentTestId)!;
return { chunk, test: data.test, result: data.resultByWorkerIndex.get(worker.workerIndex)?.result };
return { chunk, test: currentlyRunning.test, result: currentlyRunning.result };
};
worker.on('stdOut', (params: TestOutputPayload) => {
const { chunk, test, result } = handleOutput(params);
@ -531,6 +264,288 @@ export class Dispatcher {
}
}
class JobDispatcher {
private _jobResult = new ManualPromise<{ newJob?: TestGroup, didFail: boolean }>();
private _listeners: RegisteredListener[] = [];
private _failedTests = new Set<TestCase>();
private _remainingByTestId = new Map<string, TestCase>();
private _dataByTestId = new Map<string, { test: TestCase, result: TestResult, steps: Map<string, TestStep> }>();
private _parallelIndex = 0;
private _workerIndex = 0;
private _currentlyRunning: { test: TestCase, result: TestResult } | undefined;
constructor(private _job: TestGroup, private _reporter: ReporterV2, private _failureTracker: FailureTracker, private _stopCallback: () => void) {
this._remainingByTestId = new Map(this._job.tests.map(e => [e.id, e]));
}
private _onTestBegin(params: TestBeginPayload) {
const test = this._remainingByTestId.get(params.testId);
if (!test) {
// TODO: this should never be the case, report an internal error?
return;
}
const result = test._appendTestResult();
this._dataByTestId.set(test.id, { test, result, steps: new Map() });
result.parallelIndex = this._parallelIndex;
result.workerIndex = this._workerIndex;
result.startTime = new Date(params.startWallTime);
this._reporter.onTestBegin(test, result);
this._currentlyRunning = { test, result };
}
private _onTestEnd(params: TestEndPayload) {
if (this._failureTracker.hasReachedMaxFailures()) {
// Do not show more than one error to avoid confusion, but report
// as interrupted to indicate that we did actually start the test.
params.status = 'interrupted';
params.errors = [];
}
const data = this._dataByTestId.get(params.testId);
if (!data) {
// TODO: this should never be the case, report an internal error?
return;
}
this._dataByTestId.delete(params.testId);
this._remainingByTestId.delete(params.testId);
const { result, test } = data;
result.duration = params.duration;
result.errors = params.errors;
result.error = result.errors[0];
result.status = params.status;
test.expectedStatus = params.expectedStatus;
test.annotations = params.annotations;
test.timeout = params.timeout;
const isFailure = result.status !== 'skipped' && result.status !== test.expectedStatus;
if (isFailure)
this._failedTests.add(test);
this._reportTestEnd(test, result);
this._currentlyRunning = undefined;
}
private _onStepBegin(params: StepBeginPayload) {
const data = this._dataByTestId.get(params.testId);
if (!data) {
// The test has finished, but steps are still coming. Just ignore them.
return;
}
const { result, steps, test } = data;
const parentStep = params.parentStepId ? steps.get(params.parentStepId) : undefined;
const step: TestStep = {
title: params.title,
titlePath: () => {
const parentPath = parentStep?.titlePath() || [];
return [...parentPath, params.title];
},
parent: parentStep,
category: params.category,
startTime: new Date(params.wallTime),
duration: -1,
steps: [],
location: params.location,
};
steps.set(params.stepId, step);
(parentStep || result).steps.push(step);
this._reporter.onStepBegin(test, result, step);
}
private _onStepEnd(params: StepEndPayload) {
const data = this._dataByTestId.get(params.testId);
if (!data) {
// The test has finished, but steps are still coming. Just ignore them.
return;
}
const { result, steps, test } = data;
const step = steps.get(params.stepId);
if (!step) {
this._reporter.onStdErr('Internal error: step end without step begin: ' + params.stepId, test, result);
return;
}
step.duration = params.wallTime - step.startTime.getTime();
if (params.error)
step.error = params.error;
steps.delete(params.stepId);
this._reporter.onStepEnd(test, result, step);
}
private _onAttach(params: AttachmentPayload) {
const data = this._dataByTestId.get(params.testId)!;
if (!data) {
// The test has finished, but attachments are still coming. Just ignore them.
return;
}
const attachment = {
name: params.name,
path: params.path,
contentType: params.contentType,
body: params.body !== undefined ? Buffer.from(params.body, 'base64') : undefined
};
data.result.attachments.push(attachment);
}
private _massSkipTestsFromRemaining(testIds: Set<string>, errors: TestError[], onlyStartedTests?: boolean) {
for (const test of this._remainingByTestId.values()) {
if (!testIds.has(test.id))
continue;
if (!this._failureTracker.hasReachedMaxFailures()) {
const runData = this._dataByTestId.get(test.id);
// There might be a single test that has started but has not finished yet.
let result: TestResult;
if (runData) {
result = runData.result;
} else {
if (onlyStartedTests && this._currentlyRunning)
continue;
result = test._appendTestResult();
this._reporter.onTestBegin(test, result);
}
result.errors = [...errors];
result.error = result.errors[0];
result.status = errors.length ? 'failed' : 'skipped';
this._reportTestEnd(test, result);
this._failedTests.add(test);
errors = []; // Only report errors for the first test.
}
this._remainingByTestId.delete(test.id);
}
if (errors.length) {
// We had fatal errors after all tests have passed - most likely in some teardown.
// Let's just fail the test run.
this._failureTracker.onWorkerError();
for (const error of errors)
this._reporter.onError(error);
}
}
private _onDone(params: DonePayload & { unexpectedExitError?: TestError }) {
// We won't file remaining if:
// - there are no remaining
// - we are here not because something failed
// - no unrecoverable worker error
if (!this._remainingByTestId.size && !this._failedTests.size && !params.fatalErrors.length && !params.skipTestsDueToSetupFailure.length && !params.fatalUnknownTestIds && !params.unexpectedExitError) {
this._finished({ didFail: false });
return;
}
if (params.fatalUnknownTestIds) {
const titles = params.fatalUnknownTestIds.map(testId => {
const test = this._remainingByTestId.get(testId);
return test?.titlePath().slice(1).join(' > ');
}).filter(title => !!title);
this._massSkipTestsFromRemaining(new Set(params.fatalUnknownTestIds), [{
message: `Test(s) not found in the worker process. Make sure test titles do not change:\n${titles.join('\n')}`
}]);
}
if (params.fatalErrors.length) {
// In case of fatal errors, report first remaining test as failing with these errors,
// and all others as skipped.
this._massSkipTestsFromRemaining(new Set(this._remainingByTestId.keys()), params.fatalErrors);
}
// Handle tests that should be skipped because of the setup failure.
this._massSkipTestsFromRemaining(new Set(params.skipTestsDueToSetupFailure), []);
// Handle unexpected worker exit.
if (params.unexpectedExitError)
this._massSkipTestsFromRemaining(new Set(this._remainingByTestId.keys()), [params.unexpectedExitError], true /* onlyStartedTests */);
const retryCandidates = new Set<TestCase>();
const serialSuitesWithFailures = new Set<Suite>();
for (const failedTest of this._failedTests) {
retryCandidates.add(failedTest);
let outermostSerialSuite: Suite | undefined;
for (let parent: Suite | undefined = failedTest.parent; parent; parent = parent.parent) {
if (parent._parallelMode === 'serial')
outermostSerialSuite = parent;
}
if (outermostSerialSuite)
serialSuitesWithFailures.add(outermostSerialSuite);
}
// We have failed tests that belong to a serial suite.
// We should skip all future tests from the same serial suite.
for (const test of this._remainingByTestId.values()) {
let parent: Suite | undefined = test.parent;
while (parent && !serialSuitesWithFailures.has(parent))
parent = parent.parent;
// Does not belong to the failed serial suite, keep it.
if (!parent)
continue;
// Emulate a "skipped" run, and drop this test from remaining.
const result = test._appendTestResult();
this._reporter.onTestBegin(test, result);
result.status = 'skipped';
this._reportTestEnd(test, result);
this._remainingByTestId.delete(test.id);
}
for (const serialSuite of serialSuitesWithFailures) {
// Add all tests from faiiled serial suites for possible retry.
// These will only be retried together, because they have the same
// "retries" setting and the same number of previous runs.
serialSuite.allTests().forEach(test => retryCandidates.add(test));
}
const remaining = [...this._remainingByTestId.values()];
for (const test of retryCandidates) {
if (test.results.length < test.retries + 1)
remaining.push(test);
}
// This job is over, we will schedule another one.
const newJob = remaining.length ? { ...this._job, tests: remaining } : undefined;
this._finished({ didFail: true, newJob });
}
private _onExit(data: ProcessExitData) {
const unexpectedExitError: TestError | undefined = data.unexpectedly ? {
message: `Internal error: worker process exited unexpectedly (code=${data.code}, signal=${data.signal})`
} : undefined;
this._onDone({ skipTestsDueToSetupFailure: [], fatalErrors: [], unexpectedExitError });
}
private _finished(result: { newJob?: TestGroup, didFail: boolean }) {
eventsHelper.removeEventListeners(this._listeners);
this._jobResult.resolve(result);
}
async runInWorker(worker: WorkerHost): Promise<{ newJob?: TestGroup, didFail: boolean }> {
this._parallelIndex = worker.parallelIndex;
this._workerIndex = worker.workerIndex;
const runPayload: RunPayload = {
file: this._job.requireFile,
entries: this._job.tests.map(test => {
return { testId: test.id, retry: test.results.length };
}),
};
worker.runTestGroup(runPayload);
this._listeners = [
eventsHelper.addEventListener(worker, 'testBegin', this._onTestBegin.bind(this)),
eventsHelper.addEventListener(worker, 'testEnd', this._onTestEnd.bind(this)),
eventsHelper.addEventListener(worker, 'stepBegin', this._onStepBegin.bind(this)),
eventsHelper.addEventListener(worker, 'stepEnd', this._onStepEnd.bind(this)),
eventsHelper.addEventListener(worker, 'attach', this._onAttach.bind(this)),
eventsHelper.addEventListener(worker, 'done', this._onDone.bind(this)),
eventsHelper.addEventListener(worker, 'exit', this._onExit.bind(this)),
];
return this._jobResult;
}
currentlyRunning() {
return this._currentlyRunning;
}
private _reportTestEnd(test: TestCase, result: TestResult) {
this._reporter.onTestEnd(test, result);
this._failureTracker.onTestEnd(test, result);
if (this._failureTracker.hasReachedMaxFailures())
this._stopCallback();
}
}
function chunkFromParams(params: TestOutputPayload): string | Buffer {
if (typeof params.text === 'string')
return params.text;

View File

@ -30,7 +30,6 @@ export type ProcessExitData = {
export class ProcessHost extends EventEmitter {
private process: child_process.ChildProcess | undefined;
private _didSendStop = false;
private _didFail = false;
private didExit = false;
private _runnerScript: string;
private _lastMessageId = 0;
@ -137,9 +136,7 @@ export class ProcessHost extends EventEmitter {
this.sendMessage(message).catch(() => {});
}
async stop(didFail?: boolean) {
if (didFail)
this._didFail = true;
async stop() {
if (this.didExit)
return;
if (!this._didSendStop) {
@ -149,10 +146,6 @@ export class ProcessHost extends EventEmitter {
await new Promise(f => this.once('exit', f));
}
didFail() {
return this._didFail;
}
didSendStop() {
return this._didSendStop;
}

View File

@ -29,8 +29,8 @@ export class WorkerHost extends ProcessHost {
readonly parallelIndex: number;
readonly workerIndex: number;
private _hash: string;
currentTestId: string | null = null;
private _params: WorkerInitParams;
private _didFail = false;
constructor(testGroup: TestGroup, parallelIndex: number, config: SerializedConfig, extraEnv: Record<string, string | undefined>, outputDir: string) {
const workerIndex = lastWorkerIndex++;
@ -62,7 +62,9 @@ export class WorkerHost extends ProcessHost {
}
override async stop(didFail?: boolean) {
await super.stop(didFail);
if (didFail)
this._didFail = true;
await super.stop();
await removeFolders([this._params.artifactsDir]);
}
@ -73,4 +75,8 @@ export class WorkerHost extends ProcessHost {
hash() {
return this._hash;
}
didFail() {
return this._didFail;
}
}