public void GetSmallestPair_ArrayWithLessThanTwoElements_ExceptionThrown()
{
var scanner = new SmallestPairScanner();
var firstCase = Assert.Throws <ArgumentException>(() => scanner.GetSmallestPair(new[] { 1 }));
Assert.That(firstCase.Message, Is.EqualTo("Not enough elements in array or array is null"));
var secondCase = Assert.Throws <ArgumentException>(() => scanner.GetSmallestPair(Array.Empty <int>()));
Assert.That(secondCase.Message, Is.EqualTo("Not enough elements in array or array is null"));
//third case
Assert.DoesNotThrow(() => scanner.GetSmallestPair(new [] { 1, 2, 3 }));
}
public void GetSmallestPair_ArrayWithMoreThanOneElement_ExpectedPair()
{
var scanner = new SmallestPairScanner();
var firstCase = new[] { 2, 3 };
var secondCase = new[] { 4, 0, 3, 19, 492, -10, 1 };
var thirdCase = new int[100000000];
var firstCaseResult = scanner.GetSmallestPair(firstCase);
var secondCaseResult = scanner.GetSmallestPair(secondCase);
var thirdCaseResult = scanner.GetSmallestPair(thirdCase);
Assert.AreEqual((2, 3), firstCaseResult);
Assert.AreEqual((-10, 0), secondCaseResult);
Assert.AreEqual((0, 0), thirdCaseResult);
}
