delete in an Array with protractor

delete_array_test.js

  it "delete in an Array" , ->
    element.all(By.repeater('a in Array.list')).count()
      .then (@number_of_rows_before) ->
        element.all(By.css('i.fa.fa-chevron-up')).last().click()
        element.all(By.css('a.glyphicon.glyphicon-trash')).last().click()

      .then () ->
        waitForAlert()
        .then () ->
          browser.switchTo().alert().accept()
          .then ()->
            expect(element.all(By.repeater('a in claim_attachments.activities')).count()).toEqual(@number_of_rows_before - 1)