public void Division_EQ_Test()
{
var calculator = new NormalCalculator();
Assert.Equal(0.5, calculator.Division(1, 2));
Assert.Equal(double.NaN, calculator.Division(1, 0));
}
public void Division_NonEQ_Test()
{
var calculator = new NormalCalculator();
Assert.NotEqual(0.5, calculator.Division(1, 3));
}