license import { Observable , of } from 'rxjs' ; import { tap } from 'rxjs/operators' ; describe ( 'Observable.tap' , ( ) => { let log ; let observable1 ; beforeEach ( ( ) => { log = [ ] ; } ) ; it ( 'do func callback should run in the correct zone' , ( ) => { const constructorZone1 = Zone . current . fork ( { name : 'Constructor Zone1' } ) ; const doZone1 = Zone . current . fork ( { name : 'Do Zone1' } ) ; const subscriptionZone = Zone . current . fork ( { name : 'Subscription Zone' } ) ; const error = new Error ( 'test' ) ; observable1 = constructorZone1 . run ( ( ) => { return of ( 1 ) ; } ) ; observable1 = doZone1 . run ( ( ) => { return observable1 . pipe ( tap ( ( v ) => { log . push ( v ) ; expect ( Zone . current . name ) . toEqual ( doZone1 . name ) ; } ) ) ; } ) ; subscriptionZone . run ( ( ) => { observable1 . subscribe ( ( result ) => { log . push ( 'result' + result ) ; expect ( Zone . current . name ) . toEqual ( subscriptionZone . name ) ; } , ( err ) => { fail ( 'should not call error' ) ; } , ( ) => { log . push ( 'completed' ) ; expect ( Zone . current . name ) . toEqual ( subscriptionZone . name ) ; expect ( log ) . toEqual ( [ 1 , 'result1' , 'completed' ] ) ; } ) ; } ) ; } ) ; } ) ;