anchor.diff:      { Classification: string
         Span: int * int * int * int }
   
  -type SyntaxConstructClassifierHelper() =    
  +type SyntaxConstructClassifierHelper() =
       inherit VsTestBase()
       
       let classifierProvider = new SyntaxConstructClassifierProvider(
  
positive.code:     
      let helper = new SyntaxConstructClassifierHelper()
      let mutable fileName = null 
  
      [<SetUp>]
      let setUp() = fileName <- getTempFileName ".fsx"
  
      [<Test>]
      let ``should return a single operator symbol if the code doesn't contain any other symbols``() = 
  
negative.code:                   { 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
  
      [<TestFixtureTearDown>]
      let tearDownAll() =
          if File.Exists(dummyFileName) then
              File.Delete(dummyFileName)
          