public void TestNextPowerOf2Int()
{
Assert.AreEqual(1, IntegerHelper.NextPowerOf2(0));
Assert.AreEqual(1, IntegerHelper.NextPowerOf2(1));
Assert.AreEqual(2, IntegerHelper.NextPowerOf2(2));
Assert.AreEqual(4, IntegerHelper.NextPowerOf2(3));
Assert.AreEqual(4, IntegerHelper.NextPowerOf2(4));
Assert.AreEqual(1073741824, IntegerHelper.NextPowerOf2(536870913));
Assert.AreEqual(1073741824, IntegerHelper.NextPowerOf2(1073741823));
Assert.AreEqual(1073741824, IntegerHelper.NextPowerOf2(1073741824));
}
public void TestNextPowerOf2UInt()
{
Assert.AreEqual(1U, IntegerHelper.NextPowerOf2(0U));
Assert.AreEqual(1U, IntegerHelper.NextPowerOf2(1U));
Assert.AreEqual(2U, IntegerHelper.NextPowerOf2(2U));
Assert.AreEqual(4U, IntegerHelper.NextPowerOf2(3U));
Assert.AreEqual(4U, IntegerHelper.NextPowerOf2(4U));
Assert.AreEqual(2147483648U, IntegerHelper.NextPowerOf2(1073741825U));
Assert.AreEqual(2147483648U, IntegerHelper.NextPowerOf2(2147483647U));
Assert.AreEqual(2147483648U, IntegerHelper.NextPowerOf2(2147483648U));
}
public void TestNextPowerOf2Long()
{
Assert.AreEqual(1L, IntegerHelper.NextPowerOf2(0L));
Assert.AreEqual(1L, IntegerHelper.NextPowerOf2(1L));
Assert.AreEqual(2L, IntegerHelper.NextPowerOf2(2L));
Assert.AreEqual(4L, IntegerHelper.NextPowerOf2(3L));
Assert.AreEqual(4L, IntegerHelper.NextPowerOf2(4L));
Assert.AreEqual(4611686018427387904L, IntegerHelper.NextPowerOf2(2305843009213693953L));
Assert.AreEqual(4611686018427387904L, IntegerHelper.NextPowerOf2(4611686018427387903L));
Assert.AreEqual(4611686018427387904L, IntegerHelper.NextPowerOf2(4611686018427387904L));
}
public void TestCountBitsInLongInteger()
{
Assert.AreEqual(0, IntegerHelper.CountBits(0L));
Assert.AreEqual(64, IntegerHelper.CountBits(-1L));
Assert.AreEqual(32, IntegerHelper.CountBits(0x5555555555555555));
Assert.AreEqual(32, IntegerHelper.CountBits(0xAAAAAAAAAAAAAAAA));
for (int bitIndex = 0; bitIndex < 64; ++bitIndex)
{
Assert.AreEqual(1, IntegerHelper.CountBits(1 << bitIndex));
}
}
public void TestCountBitsInInteger()
{
Assert.AreEqual(0, IntegerHelper.CountBits(0));
Assert.AreEqual(32, IntegerHelper.CountBits(-1));
Assert.AreEqual(16, IntegerHelper.CountBits(0x55555555));
Assert.AreEqual(16, IntegerHelper.CountBits(0xAAAAAAAA));
for (int bitIndex = 0; bitIndex < 32; ++bitIndex)
{
Assert.AreEqual(1, IntegerHelper.CountBits(1 << bitIndex));
}
}
public void TestNextPowerOf2ULong()
{
Assert.AreEqual(1UL, IntegerHelper.NextPowerOf2(0UL));
Assert.AreEqual(1UL, IntegerHelper.NextPowerOf2(1UL));
Assert.AreEqual(2UL, IntegerHelper.NextPowerOf2(2UL));
Assert.AreEqual(4UL, IntegerHelper.NextPowerOf2(3UL));
Assert.AreEqual(4UL, IntegerHelper.NextPowerOf2(4UL));
Assert.AreEqual(
9223372036854775808UL, IntegerHelper.NextPowerOf2(4611686018427387905UL)
);
Assert.AreEqual(
9223372036854775808UL, IntegerHelper.NextPowerOf2(9223372036854775807UL)
);
Assert.AreEqual(
9223372036854775808UL, IntegerHelper.NextPowerOf2(9223372036854775808UL)
);
}
