using System; using Xunit; using GradeBook; namespace GradeBook.Tests { public class BookTests { [Fact] public void Test1() { // arrange var book = new Book(""); book.AddGrade(89.1); book.AddGrade(90.5); book.AddGrade(77.3); // act var result = book.GetStatistics(); // assert Assert.Equal(85.6, result.Average, 1); Assert.Equal(90.5, result.highGrade); Assert.Equal(77.3, result.lowGrade); } } }