using Numbers.NumberFactory;

namespace Numbers.Test.NumberFactory;

public sealed class NumbersEnumeratorTests
{
    private readonly NumbersEnumerator _enumerator = new([1, 2, 3]);

    [Fact]
    public void MoveNext_StopWhenExhausted()
    {
        _enumerator.MoveNext().Should().BeTrue();
        _enumerator.MoveNext().Should().BeTrue();
        _enumerator.MoveNext().Should().BeTrue();
        _enumerator.MoveNext().Should().BeFalse();
    }

    [Fact]
    public void MoveNext_Simple()
    {
        _enumerator.MoveNext().Should().BeTrue("can move");
    }

    [Fact]
    public void Current()
    {
        _enumerator.MoveNext();
        _enumerator.Current.Should().Be(1);
        
        _enumerator.MoveNext();
        _enumerator.Current.Should().Be(2);
        
        _enumerator.MoveNext();
        _enumerator.Current.Should().Be(3);
    }

    [Fact]
    public void Reset()
    {
        _enumerator.MoveNext();
        _enumerator.MoveNext();
        
        _enumerator.Reset();
        _enumerator.Current.Should().Be(-1);
        
        _enumerator.MoveNext();
        _enumerator.Current.Should().Be(1);
    }
}