public void ComputesAverageGradeFile()
{
Gradebook book = new Gradebook();
book.AddGrade(70);
book.AddGrade(78);
book.AddGrade(90);
//book.AddGrade(92);
//book.AddGrade(93);
//this is just to test "using". you can delete this test method
using (StreamWriter ouputFile = File.CreateText("unitMetin" + "3" + ".txt"))
{
book.WriteGrades(ouputFile);
}
//ouputFile.Close();
GradeStatistics stats = book.ComputeStatistics();
Assert.AreEqual(79.33, stats.AverageGrade, 0.01);
}
