Function hasProviderWithToken

packages/core/test/acceptance/di_spec.ts:78–79

(providers: Provider[], token: InjectionToken<unknown>)

): Provider[] => providers.filter((provider) => (provider as any).provide === token);

const hasProviderWithToken = (providers: Provider[], token: InjectionToken<unknown>): boolean =>
  getProvidersByToken(providers, token).length > 0;

const collectEnvironmentInitializerProviders = (providers: Provider[]) =>
  getProvidersByToken(providers, ENVIRONMENT_INITIALIZER);