public void PowerOfTwoMatchesFloatingPointPower64()
{
for (int i = 0; i < 63; i++)
{
Assert.AreEqual(Math.Round(Math.Pow(2, i)), IntegerTheory.PowerOfTwo((long)i));
}
}
public void PowerOfTwoThrowsWhenOutOfRange64()
{
Assert.Throws(
typeof(ArgumentOutOfRangeException),
() => IntegerTheory.PowerOfTwo((long)-1));
Assert.Throws(
typeof(ArgumentOutOfRangeException),
() => IntegerTheory.PowerOfTwo((long)63));
Assert.Throws(
typeof(ArgumentOutOfRangeException),
() => IntegerTheory.PowerOfTwo(Int64.MinValue));
Assert.Throws(
typeof(ArgumentOutOfRangeException),
() => IntegerTheory.PowerOfTwo(Int64.MaxValue));
Assert.DoesNotThrow(
() => IntegerTheory.PowerOfTwo((long)62));
Assert.DoesNotThrow(
() => IntegerTheory.PowerOfTwo((long)0));
}
public void PowerOfTwoThrowsWhenOutOfRange32()
{
Assert.Throws(
typeof(ArgumentOutOfRangeException),
() => IntegerTheory.PowerOfTwo(-1));
Assert.Throws(
typeof(ArgumentOutOfRangeException),
() => IntegerTheory.PowerOfTwo(31));
Assert.Throws(
typeof(ArgumentOutOfRangeException),
() => IntegerTheory.PowerOfTwo(Int32.MinValue));
Assert.Throws(
typeof(ArgumentOutOfRangeException),
() => IntegerTheory.PowerOfTwo(Int32.MaxValue));
Assert.DoesNotThrow(
() => IntegerTheory.PowerOfTwo(30));
Assert.DoesNotThrow(
() => IntegerTheory.PowerOfTwo(0));
}