public void IfThenElse()
{
// arrange
const int NumElements = 4;
var conditionData = new[] { false, true, false, true };
var targetData = new int[NumElements];
var ifTrueData = new[] { 1, 2, 3, 4 };
var ifFalseData = new[] { 5, 6, 7, 8 };
var condition = new DataAndLayout <bool>(conditionData, new FastAccess(new Layout(new int[] { 4 }, 0, new int[] { 1 })));
var target = new DataAndLayout <int>(targetData, new FastAccess(new Layout(new int[] { 4 }, 0, new int[] { 1 })));
var ifTrue = new DataAndLayout <int>(ifTrueData, new FastAccess(new Layout(new int[] { 4 }, 0, new int[] { 1 })));
var ifFalse = new DataAndLayout <int>(ifFalseData, new FastAccess(new Layout(new int[] { 4 }, 0, new int[] { 1 })));
// action
ScalarOps.IfThenElse(target, condition, ifTrue, ifFalse);
// assert
CollectionAssert.AreEqual(new[] { 5, 2, 7, 4 }, targetData);
}