public void TwoSumTest()
{
var test = new ArrayQ();
Assert.AreEqual(null, test.TwoSum(new int[] { }, 10));
Assert.AreEqual(null, test.TwoSum(new int[] { 1 }, 10));
Assert.AreEqual(null, test.TwoSum(new int[] { 2, 3 }, 10));
Assert.AreEqual(string.Join(", ", new int[] { 0, 1 }).Trim(),
string.Join(", ", test.TwoSum(new int[] { 5, 5 }, 10)).Trim());
Assert.AreEqual(string.Join(", ", new int[] { 0, 1 }).Trim(),
string.Join(", ", test.TwoSum(new int[] { 2, 7, 11, 15 }, 9)).Trim());
Assert.AreEqual(string.Join(", ", new int[] { 0, 3 }).Trim(),
string.Join(", ", test.TwoSum(new int[] { 2, 11, 15, 7 }, 9)).Trim());
Assert.AreEqual(string.Join(", ", new int[] { 0, 3 }).Trim(),
string.Join(", ", test.TwoSum(new int[] { 7, 11, 15, 2, 7 }, 9)).Trim());
Assert.AreEqual(string.Join(", ", new int[] { 1, 2 }).Trim(),
string.Join(", ", test.TwoSum(new int[] { 3, 2, 4 }, 6)).Trim());
}