anchor.diff:      |> should equal "app.config"
   
   [<Test>]
  -let ``parse - move down nonexistent files ``() =
  +let ``ProjectSystem - parse - move down nonexistent files ``() =
       let pf = FsProject.parse astInput
       let pf' = FsProject.moveDown "dont_exist.fs" pf
       pf'.SourceFiles.AllFiles()
  
positive.code: //        |> should equal true
  
  [<Test>]
  let ``parse - list references``() =
      let pf = FsProject.parse astInput
      let refs = FsProject.listReferences pf
      refs.Length |> should be (equal 5)
  
  [<Test>]
  let ``parse - list files``() =
      let pf = FsProject.parse astInput
      let files = FsProject.listSourceFiles pf
      files.Length |> should be (equal 3)
  
negative.code: 
  // TODO: complete test code
  [<Test>]
  let ``ProjectSystem - parse - add above (?)``() =
      true |> should equal true
  
  // TODO: complete test code
  [<Test>]
  let ``ProjectSystem - parse - add below (?)``() =
      true |> should equal true
  
  [<Test>]
  let ``ProjectSystem - parse - remove dir``() =
      let pf = FsProject.parse projectWithDirs
      let pf' = FsProject.removeDirectory "OneDirectory" pf
      let files = pf'.SourceFiles.AllFiles()
  