public void GetPairWithMaximumDifference_ThrowsException_ForNullSequence()
{
Assert.Throws <ArgumentNullException>(
() => Pairing.GetPairWithMaximumDifference(null, Comparer <int> .Default));
}
public void GetPairWithMaximumDifference_WorksForNegative()
{
var result = Pairing.GetPairWithMaximumDifference(new[] { 0, -100, 100 }, Comparer <int> .Default);
Assert.AreEqual((-100, 100), result);
}
public void GetPairWithMaximumDifference_ThrowsException_ForNullComparer()
{
Assert.Throws <ArgumentNullException>(
() => Pairing.GetPairWithMaximumDifference(new int[] { }, null));
}
public void GetPairWithMaximumDifference_TakesComparerIntoAccount()
{
var result = Pairing.GetPairWithMaximumDifference(new[] { -1, 0, 1 }, Comparer <int> .Create((l, r) => r - l));
Assert.AreEqual((1, -1), result);
}
public void GetPairWithMaximumDifference_ReturnsThePair_ForTwoElements_2()
{
var result = Pairing.GetPairWithMaximumDifference(new[] { 2, 1 }, Comparer <int> .Default);
Assert.AreEqual((1, 2), result);
}
public void GetPairWithMaximumDifference_ReturnsNull_ForOneElement()
{
var result = Pairing.GetPairWithMaximumDifference(new[] { 1 }, Comparer <int> .Default);
Assert.IsNull(result);
}
public void GetPairWithMaximumDifference_ReturnsNull_ForEmptySequence()
{
var result = Pairing.GetPairWithMaximumDifference(new int[] { }, Comparer <int> .Default);
Assert.IsNull(result);
}
