chore(toh-5): improve e2e test coverage and readability (use async/await) (#2092)
chore(toh-5): improve e2e test coverage and readability (use async/await) (#2092)

* chore(toh-5): improve e2e test coverage

Improved test coverage. Also updated tests to make use of async/await
(so tests are more readable).

* lint feedback

GuzmanPI/angular-es,realappie/angular.io,juleskremer/angular.io,GuzmanPI/angular-es,naomiblack/angular.io,naomiblack/angular.io,IdeaBlade/angular.io,angular/angular.io,rsreimer/angular.io,angular/angular-ko,chalin/angular.io,angular/angular-ko,onyoon7/angular-ko,GuzmanPI/angular-es,angular/angular-cn,onyoon7/angular-ko,Urigo/angular.io,SaloGala/angular-es,gyujincho/angular-ko,angular/angular-es,GuzmanPI/angular-es,Urigo/angular.io,angular/angular.io,angular/angular-ko,chalin/angular.io,kwalrath/angular.io,NoahLuftYang/angular-ko,slm-sum/angular-ja,SaloGala/angular-es,slm-sum/angular-ja,angular/angular-es,slm-sum/angular-ja,chalin/angular.io,NoahLuftYang/angular-ko,kwalrath/angular.io,gyujincho/angular-ko,kwalrath/angular.io,Urigo/angular.io,GuzmanPI/angular-es,rsreimer/angular.io,SaloGala/angular-es,juleskremer/angular.io,angular/angular.io,Urigo/angular.io,IdeaBlade/angular.io,angular/angular-cn,juleskremer/angular.io,Urigo/angular.io,SaloGala/angular-es,realappie/angular.io,onyoon7/angular-ko,slm-sum/angular-ja,IdeaBlade/angular.io,realappie/angular.io,angular/angular-cn,juleskremer/angular.io,rsreimer/angular.io,chalin/angular.io,naomiblack/angular.io,gyujincho/angular-ko,kwalrath/angular.io,rsreimer/angular.io,angular/angular.io,angular/angular-ko,NoahLuftYang/angular-ko,NoahLuftYang/angular-ko,SaloGala/angular-es,naomiblack/angular.io,kwalrath/angular.io,slm-sum/angular-ja,angular/angular-cn,angular/angular.io,naomiblack/angular.io,realappie/angular.io,realappie/angular.io,angular/angular-ko,chalin/angular.io,angular/angular-es,NoahLuftYang/angular-ko,rsreimer/angular.io,angular/angular-es,onyoon7/angular-ko,angular/angular-cn,angular/angular-es,juleskremer/angular.io,IdeaBlade/angular.io,onyoon7/angular-ko,IdeaBlade/angular.io,gyujincho/angular-ko,gyujincho/angular-ko