public void ComputesLowestGrade()
{
GradeBook book = new GradeBook();
book.AddGrades(10);
book.AddGrades(90);
GradeStatistics result = book.ComputeStatistics();
Assert.AreEqual(10, result.LowestGrade);
}
public void IsDescriptionGradeNameCorrect()
{
GradeBook book = new GradeBook();
book.AddGrades(91);
book.AddGrades(89.5f);
book.AddGrades(75);
GradeStatistics result = book.ComputeStatistics();
Assert.AreEqual("Good", result.Description);
}
public void ComputesAvarageGrade()
{
GradeBook book = new GradeBook();
book.AddGrades(91);
book.AddGrades(89.5f);
book.AddGrades(75);
GradeStatistics result = book.ComputeStatistics();
Assert.AreEqual(85.16, result.AvareGrade, 0.01);
}
public void ComputesLetterGrade()
{
GradeBook book = new GradeBook();
book.AddGrades(91);
book.AddGrades(89.5f);
book.AddGrades(75);
book.WriteGrades(Console.Out);
GradeStatistics result = book.ComputeStatistics();
Assert.AreEqual("B", result.LetterGrade);
}
public void TestWriteGradesWithStreamWriter()
{
using (StreamWriter outputFile = File.CreateText("grades.txt"))
{
GradeBook book = new GradeBook();
book.AddGrades(91);
book.WriteGrades(outputFile);
Assert.IsNotNull(outputFile);
}
}
public void TestWriteGrades()
{
using (StringWriter sw = new StringWriter())
{
Console.SetOut(sw);
GradeBook book = new GradeBook();
book.AddGrades(91);
book.WriteGrades(Console.Out);
string expected = string.Format("91{0}", Environment.NewLine);
Assert.AreEqual <string>(expected, sw.ToString());
}
}