public void IfEmptyTest()
{
int[] list = { 1, 2, 3, 4 };
list = list.IfEmpty(() => KAssert.Fail("Empty action should not be triggered.")).ToArray();
Assert.Throws <ArgumentNullException>(() => list.IfEmpty(null !).ToList());
list = null;
Assert.Throws <ArgumentNullException>(() => list !.IfEmpty(() => { }).ToList());
list = Array.Empty <int>();
Assert.Throws <ArgumentException>(() => list.IfEmpty(() => throw new ArgumentException()).ToList());
Assert.Empty(list.IfEmpty(() => { }));
}
await Assert.ThrowsAsync <ArgumentException>(() => Faulted().Then(_ => KAssert.Fail()));
