public void ArrayPeekEnumerator_ShouldWorkForTwoElements()
{
var data = new int[] { 1, 2 };
var enumerator = new ArrayPeekEnumerator <int>(data);
Assert.IsTrue(enumerator.TryPeek(out var first));
Assert.AreEqual(1, first);
Assert.IsTrue(enumerator.TryPeek2(out first, out var second));
Assert.AreEqual(1, first);
Assert.AreEqual(2, second);
Assert.IsTrue(enumerator.MoveNext());
Assert.AreEqual(1, enumerator.Current);
Assert.IsTrue(enumerator.TryPeek(out second));
Assert.IsFalse(enumerator.TryPeek2(out _, out _));
Assert.AreEqual(2, second);
Assert.IsTrue(enumerator.MoveNext());
Assert.AreEqual(2, enumerator.Current);
Assert.IsFalse(enumerator.TryPeek(out _));
Assert.IsFalse(enumerator.MoveNext());
}
public void ArrayPeekEnumerator_ShouldWorkForEmptyEnumerator()
{
var data = new int[0];
var enumerator = new ArrayPeekEnumerator <int>(data);
Assert.IsFalse(enumerator.TryPeek(out _));
Assert.IsFalse(enumerator.TryPeek2(out _, out _));
Assert.IsFalse(enumerator.MoveNext());
Assert.IsFalse(enumerator.TryPeek(out _));
Assert.IsFalse(enumerator.TryPeek2(out _, out _));
}