public void WaveReturnsAnEmptyListIfThereAreNoStudentsInThatWave()
{
var school = new CodeSchool();
var actual = school.Grade(1);
Assert.Empty(actual);
}
public void WaveReturnsTheStudentsInThatWaveInAlphabeticalOrder()
{
var school = new CodeSchool();
school.Add("Franklin", 5);
school.Add("Bradley", 5);
school.Add("Jeff", 1);
var actual = school.Grade(5);
var expected = new[] { "Bradley", "Franklin" };
Assert.Equal(expected, actual);
}