anchor.diff:  """
           let projectFileName = fullPathBasedOnSourceDir "../data/TypeProviderTests/TypeProviderTests.fsproj"
           let fileName = fullPathBasedOnSourceDir "../data/TypeProviderTests/TypeProviderTests.fs"
  -        let buffer = createMockTextBuffer content fileName        
  +        let buffer = createMockTextBuffer content fileName
           helper.SetUpProjectAndCurrentDocument(ExternalProjectProvider(projectFileName), fileName)
           let classifier = helper.GetClassifier(buffer)
           testEvent classifier.ClassificationChanged "Timed out before classification changed" timeout <| fun _ -> 
  
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: 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
          dummyFileName <- fileName
          File.WriteAllText(dummyFileName, "")
          helper.SetUpProjectAndCurrentDocument(createVirtualProject(buffer, fileName), fileName)
          let classifier = helper.GetClassifier(buffer)
  
  