using System.Collections;
using System.Collections.Generic;
using NUnit.Framework;

namespace Assets.Data
{
    [TestFixture]
    public class TestBitWise
    {
        [Test]
        [TestCaseSource(typeof(BitwiseCase), "BitwiseCombination")]
        public void TestBitwiseCombination(int n, int p, HashSet<long> expected)
        {
            HashSet<long> output = BitWise.GetAllPermutation(n, p);
            Assert.IsTrue(output.SetEquals(expected));
        }
    }

    public class BitwiseCase
    {
        public static IEnumerable BitwiseCombination
        {
            get
            {
                yield return new TestCaseData(
                    3,
                    5,
                    new HashSet<long>()
                    {
                        0b11100,
                        0b11010,
                        0b10110,
                        0b01110,
                        0b11001,
                        0b10101,
                        0b01101,
                        0b10011,
                        0b01011,
                        0b00111,
                    }
                );
                yield return new TestCaseData(
                    1,
                    1,
                    new HashSet<long>()
                    {
                        0b001
                    }
                );
                yield return new TestCaseData(
                    2,
                    3,
                    new HashSet<long>()
                    {
                        0b011,
                        0b110,
                        0b101
                    }
                );
                yield return new TestCaseData(
                    2,
                    4,
                    new HashSet<long>()
                    {
                        0b0011,
                        0b0101,
                        0b1001,
                        0b0110,
                        0b1010,
                        0b1100
                    }
                );
            }
        }
    }

}