test(ui5-multi-combobox): integrate cypress tests

[elenastoyanovaa]

No description provided.

[ndeshev]

Overall the test migration looks comprehensive and well written, I only have a couple minor comments

[ndeshev]

There are leading spaces on empty lines - #1853 #1911 #1951

[ndeshev]

Locally the accessibility tests are failing with this error:

 2) Accessibility
       "after each" hook for "Should apply aria-controls and aria-haspopup":
     CypressError: Cypress detected that you returned a promise from a command while also invoking one or more cy commands in that promise.

The command that returned the promise was:

  > `cy.find()`

The cy command you invoked inside the promise was:

  > `cy.log()`

Because Cypress commands are already promise-like, you don't need to wrap them or return your own promise.

Cypress will resolve your command with whatever the final Cypress command yields.      

The reason this is an error instead of a warning is because Cypress internally queues commands serially whereas Promises execute as soon as they are invoked. Attempting to reconcile this would prevent Cypress from ever resolving.

https://on.cypress.io/returning-promise-and-commands-in-another-command

Because this error occurred during a `after each` hook we are skipping all of the remaining tests.

[elenastoyanovaa]

Locally the accessibility tests are failing with this error:

 2) Accessibility
       "after each" hook for "Should apply aria-controls and aria-haspopup":
     CypressError: Cypress detected that you returned a promise from a command while also invoking one or more cy commands in that promise.

The command that returned the promise was:

  > `cy.find()`

The cy command you invoked inside the promise was:

  > `cy.log()`

Because Cypress commands are already promise-like, you don't need to wrap them or return your own promise.

Cypress will resolve your command with whatever the final Cypress command yields.      

The reason this is an error instead of a warning is because Cypress internally queues commands serially whereas Promises execute as soon as they are invoked. Attempting to reconcile this would prevent Cypress from ever resolving.

https://on.cypress.io/returning-promise-and-commands-in-another-command

Because this error occurred during a `after each` hook we are skipping all of the remaining tests.

I am not able to reproduce it, maybe it was corrected after applying your comments.