anchor.diff:      t.CalculateStatisticsTest_3 ()
       t.CalculateStatisticsTest_4 ()
       t.CalculateStatisticsTest_5 ()
  +    t.CalculateStatisticsTest_6 ()
  +    t.CalculateStatisticsTest_7 ()
       0
   
  
positive.code:     else*) System.IO.Directory.CreateDirectory directoryPath |> ignore
      let t = new CommonAstTest () 
  
      tree_4.AstToDot numToString tokenToNumber (Some tokenData) leftSide path
  
      t.FindNonterminalsByIndTest ()
      t.FindNonterminalsByStringTest ()
  
negative.code:         Assert.AreEqual(1, max)
          Assert.AreEqual(0, min)
          Assert.AreEqual(0.5, average)
  
  
      [<Test>]
      member this.CalculateStatisticsTest_6 () =
          let (max, min, average) = tree_5.CalculateStatistics "e"
          Assert.AreEqual(2, max)
          Assert.AreEqual(1, min)
          Assert.AreEqual(1.5, average)
  
      [<Test>]
      member this.CalculateStatisticsTest_7 () =
          let (max, min, average) = tree_5.CalculateStatistics "s"
          Assert.AreEqual(4, max)
          Assert.AreEqual(3, min)
          Assert.AreEqual(3.5, average)
  
      [<Test>]
      member this.GetTypeOfExpressionTest_4 () =
  