The Testability service provides testing hooks that can be accessed from the browser.

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class Testability implements PublicTestability {
  increasePendingRequestCount(): number
  decreasePendingRequestCount(): number
  isStable(): boolean
  whenStable(doneCb: Function, timeout?: number, updateCb?: Function): void
  getPendingRequestCount(): number
  findProviders(using: any, provider: string, exactMatch: boolean): any[]
}

Description

Angular applications bootstrapped using an NgModule (via @NgModule.bootstrap field) will also instantiate Testability by default (in both development and production modes).

For applications bootstrapped using the bootstrapApplication function, Testability is not included by default. You can include it into your applications by getting the list of necessary providers using the provideProtractorTestingSupport() function and adding them into the options.providers array. Example:

import {provideProtractorTestingSupport} from '@angular/platform-browser';

await bootstrapApplication(RootComponent, providers: [provideProtractorTestingSupport()]);

Methods

increasePendingRequestCount() Deprecated
Increases the number of pending request
increasePendingRequestCount(): number Deprecated pending requests are now tracked with zones. Parameters There are no parameters. Returns number

decreasePendingRequestCount() Deprecated
Decreases the number of pending request
decreasePendingRequestCount(): number Deprecated pending requests are now tracked with zones Parameters There are no parameters. Returns number

isStable()
Whether an associated application is stable
isStable(): boolean Parameters There are no parameters. Returns boolean

whenStable()
Wait for the application to be stable with a timeout. If the timeout is reached before that happens, the callback receives a list of the macro tasks that were pending, otherwise null.
whenStable(doneCb: Function, timeout?: number, updateCb?: Function): void Parameters doneCb Function The callback to invoke when Angular is stable or the timeout expires whichever comes first. timeout number Optional. The maximum time to wait for Angular to become stable. If not specified, whenStable() will wait forever. Optional. Default is undefined. updateCb Function Optional. If specified, this callback will be invoked whenever the set of pending macrotasks changes. If this callback returns true doneCb will not be invoked and no further updates will be issued. Optional. Default is undefined. Returns void

getPendingRequestCount() Deprecated
Get the number of pending requests
getPendingRequestCount(): number Deprecated pending requests are now tracked with zones Parameters There are no parameters. Returns number

findProviders()
Find providers by name
findProviders(using: any, provider: string, exactMatch: boolean): any[] Parameters using any The root element to search from provider string The name of binding variable exactMatch boolean Whether using exactMatch Returns any[]