test_lowest_bit.cpp

// Description: Testing for lowest bit.
// DocumentationOf: lowest_bit.h

#include "test/test_init.h"

#include <pastel/sys/integer/multi_integer.h>
#include <pastel/sys/bit/lowest_bit.h>
#include <pastel/sys/bit/highest_bit.h>
#include <pastel/sys/concept.h>

namespace
{

    template <typename Finite_Integer>
    void testCase()
    {
        REQUIRE(lowestBit(Finite_Integer(0)) == -1);
        REQUIRE(highestBit(Finite_Integer(0)) == -1);

        Finite_Integer a = 1;
        for (integer i = 0;i < bits(a);++i)
        {
            REQUIRE(lowestBit(a) == i);
            REQUIRE(highestBit(a) == i);
            a <<= 1;
        }
    }

}

TEST_CASE("lowest_bit (lowest_bit)")
{
    testCase<uint8>();
    testCase<uint16>();
    testCase<uint32>();
    testCase<uint64>();
    testCase<Signed_Integer<113, uint8>>();
    testCase<Unsigned_Integer<113, uint8>>();
}