Protractor with benchpress runner gives TypeError: capsObject.forEach is not a function

[Autushka]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[x] Bug report  
[ ] Performance issue
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead see https://github.com/angular/angular/blob/master/CONTRIBUTING.md#question
[ ] Other... Please describe:

Current behavior

When try to run protractor e2e tests with benchpress runner
getting an error:
TypeError: capsObject.forEach is not a function

Expected behavior

Minimal reproduction of the problem with instructions

e2e spec sample:

import {browser} from 'protractor';
import {RegressionSlopeValidator} from "@angular/benchpress";

var benchpress = require('@angular/benchpress');
var runner = new benchpress.Runner([
//use protractor as Webdriver client
benchpress.SeleniumWebDriverAdapter.PROTRACTOR_PROVIDERS,
//use RegressionSlopeValidator to validate samples
{provide: benchpress.Validator, useExisting: benchpress.RegressionSlopeValidator},
//use 10 samples to calculate slope regression
{provide: benchpress.RegressionSlopeValidator.SAMPLE_SIZE, useValue: 1},
//use the script metric to calculate slope regression
{provide: benchpress.RegressionSlopeValidator.METRIC, useValue: 'scriptTime'},
{provide: benchpress.Options.FORCE_GC, useValue: true}
]);

describe('initial load performance', () => {
it('initial load performance', (done) => {
runner.sample({
execute: () => {
browser.get(/);
},
userMetrics: {
timeToBootstrap: 'The time in milliseconds to bootstrap'
},
providers: [
{provide: RegressionSlopeValidator.METRIC, useValue: 'timeToBootstrap'}
]
}).then(done, done.fail);
});
});

What is the motivation / use case for changing the behavior?

Environment

Angular version: "@angular/core": "^6.0.3"


Browser:
- [x] Chrome (desktop) version 67
- [ ] Chrome (Android) version XX
- [ ] Chrome (iOS) version XX
- [ ] Firefox version XX
- [ ] Safari (desktop) version XX
- [ ] Safari (iOS) version XX
- [ ] IE version XX
- [ ] Edge version XX
 
For Tooling issues:
- Node version: 9.8.0
- Platform:  Windows

Others:

[mboughaba]

I am getting the same error. @Autushka did you manage to solve it?

[benlesh]

I'm also hitting this trying to test RxJS 7 with benchpress.

[warpech]

I can see that this was fixed in #21399 and #21477 but a new version of Benchpress was not released since.

I guess #19442 should be followed about the next release.

[BioPhoton]

Any updates here?

[JoostK]

Closing as this appears to have been resolved in benchpress 0.2.0 (with 0.3.0 being latest at the moment)

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