public void ContainsDuplicateHashSetNoDuplicateTest()
 {
     ContainsDuplicateProblem.ContainsDuplicateHashSet(new int[] { 1, 5, 3, 2, 8 }).Should().BeFalse();
 }
 public void ContainsDuplicateSortingNoDuplicateTest()
 {
     ContainsDuplicateProblem.ContainsDuplicateSorting(new int[] { 1, 5, 3, 2, 8 }).Should().BeFalse();
 }
        public void ContainsDuplicateProblemTest()
        {
            var solution = new ContainsDuplicateProblem();

            Assert.True(solution.ContainsDuplicate(new int[] { 4, 3, 2, 7, 8, 2, 3, 1 }));
        }