anchor.diff:                    { Classification = "FSharp.Function"; Span = (7, 59, 7, 67) }
                     { Classification = "FSharp.Operator"; Span = (7, 71, 7, 72) } 
                     { Classification = "FSharp.Function"; Span = (7, 74, 7, 79) } ]
  -            actual |> assertEqual expected+            actual |> assertEqual expected
  +
  +    [<TestFixtureTearDown>]
  +    let tearDownAll() =
  +        if File.Exists(dummyFileName) then
  +            File.Delete(dummyFileName)
  +        
positive.code: open System.Collections.Generic
  let internal f() = ()
  """
          let buffer = createMockTextBuffer content fileName        
          // IsSymbolUsedForProject seems to require a file to exist on disks
          // If not, type checking fails with some weird errors
          File.WriteAllText(fileName, "")
          helper.SetUpProjectAndCurrentDocument(createVirtualProject(buffer, fileName), fileName)
          let classifier = helper.GetClassifier(buffer)
  
  
negative.code:     
      let helper = new SyntaxConstructClassifierHelper()
      let mutable fileName = null 
      let mutable dummyFileName = null
  
      [<SetUp>]
      let setUp() = 
          fileName <- getTempFileName ".fsx"
  
      [<Test>]
      let ``should return a single operator symbol if the code doesn't contain any other symbols``() = 
  