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perf(platform-browser): avoid including Testability by default in bootstrapApplication (#45885)

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The Testability-related logic was refactored in https://github.com/angular/angular/pull/45657 to become tree-shaking-friendly: it was decoupled from the core providers of the `BrowserModule`. This commit updates the newly-introduced `bootstrapApplication` function to exclude Testability-providers by default (note: the Testability is still included in the NgModule-based bootstrap).

In order to add the Testability to the app bootstrapped via `bootstrapApplication`, the `provideProtractorTestingSupport` function is introduced.

PR Close #45885
This commit is contained in:
Andrew Kushnir
2022-05-04 18:01:14 -07:00
parent e441ff44b4
commit 3165fa3f4e
7 changed files with 60 additions and 53 deletions
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packages/core/src/testability/testability.ts
+16 -2
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@@ -66,8 +66,22 @@ export const TESTABILITY_GETTER = new InjectionToken<GetTestability>('');
/**
* The Testability service provides testing hooks that can be accessed from
* the browser. Each bootstrapped Angular application on the page will have
* an instance of Testability.
* the browser.
*
* 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:
*
* ```typescript
* import {provideProtractorTestingSupport} from '@angular/platform-browser';
*
* await bootstrapApplication(RootComponent, providers: [provideProtractorTestingSupport()]);
* ```
*
* @publicApi
*/
@Injectable()