AddNullDocumentTest
waitForElementPresent link=Document Library Test Page
clickAtAndWait link=Document Library Test Page
clickAtAndWait //b
clickAtAndWait //b
clickAtAndWait //input[@value='Add Document']
click link=Use the classic uploader.
waitForElementPresent _20_title
type _20_title Null File Test
type _20_description Null File Test
clickAtAndWait //input[@value='Save']
assertTextPresent You have entered invalid data. Please try again.
click link=Use the classic uploader.
assertTextPresent Please enter a file with a valid file size.