AddAtTagTest
waitForVisible link=Tags
clickAtAndWait link=Tags
clickAt add-tag-button
waitForVisible new-tag-name
type new-tag-name @test
clickAt //input[@value='Save']
waitForText tag-portlet-messages One of your fields contains invalid characters.
assertText tag-portlet-messages One of your fields contains invalid characters.
assertElementNotPresent link=@test