public void Should_behave_correctly()
{
var items = new[] { 1, 2, 3 };
var subject = new ReadAheadEnumerable <int>(items);
var enumerator = (ReadAheadEnumerable <int> .ReadAheadEnumerator)subject.GetEnumerator();
Action act = () => { int temp = enumerator.Current; };
act.ShouldThrow <InvalidOperationException>();
enumerator.MoveNext().Should().BeTrue();
enumerator.Current.Should().Be(1);
enumerator.HasNext.Should().BeTrue();
enumerator.MoveNext().Should().BeTrue();
enumerator.Current.Should().Be(2);
enumerator.HasNext.Should().BeTrue();
enumerator.MoveNext().Should().BeTrue();
enumerator.Current.Should().Be(3);
enumerator.HasNext.Should().BeFalse();
enumerator.MoveNext().Should().BeFalse();
act = () => { int temp = enumerator.Current; };
act.ShouldThrow <InvalidOperationException>();
}
public void Should_return_all_items()
{
var items = new[] { 1, 2, 3 };
var subject = new ReadAheadEnumerable <int>(items);
var list = subject.ToList();
list.Count.Should().Be(3);
list.Should().ContainInOrder(1, 2, 3);
}