public void FunctionTest()
{
Assert.Equal(4, CalculatePow.Power(2, 2));
Assert.Equal(625, CalculatePow.Power(5, 4));
Assert.Equal(0.25, CalculatePow.Power(2, -2));
Assert.Equal(0.04, CalculatePow.Power(0.2, 2), 15);// 需要指定舍入精度(这也印证了double用==判断的隐藏问题)
Assert.Equal(0, CalculatePow.Power(0, 3));
Assert.Equal(1, CalculatePow.Power(3, 0));
Assert.Equal(-8, CalculatePow.Power(-2, 3));
Assert.Equal(16, CalculatePow.Power(-2, 4));
}
public void BorderTest()
{
Assert.Equal(double.PositiveInfinity, CalculatePow.Power(2, Int32.MaxValue));
Assert.Equal(0, CalculatePow.Power(2, Int32.MinValue), 15);
}
public void ExceptionTest()
{
Assert.Throws <ArgumentException>(() => CalculatePow.Power(0, 0));
Assert.Throws <ArgumentException>(() => CalculatePow.Power(0, -2));
}