public void SingleNumber_WhenGivenInput_ReturnsExpectedResult(int[] input, int result)
        {
            var actual = SingleNumber.Solution(input);

            Assert.AreEqual(result, actual);
        }
 public void SingleNumber_WhenNullInput_Returns_0()
 {
     Assert.AreEqual(0, SingleNumber.Solution(null));
 }
 public void SingleNumber_WhenGivenInputOfLength1_Returns_Expected()
 {
     Assert.AreEqual(25, SingleNumber.Solution(new int[] { 25 }));
 }