public void Repeat0Parser()
{
var emptyStream = new MemoryStream <char>(string.Empty.AsMemory());
var nonEmptyStream = new MemoryStream <char>("aaa".AsMemory());
var p = Combinator.Rep0(Combinator.Char('a'));
var r1 = p.Parse(emptyStream);
var r2 = p.Parse(nonEmptyStream);
Assert.True(r1.IsOk);
Assert.True(r2.IsOk);
Assert.Equal(0, r1.Ok.Value.Count);
Assert.Equal(3, r2.Ok.Value.Count);
Assert.Equal('a', r2.Ok.Value[0]);
Assert.Equal('a', r2.Ok.Value[1]);
Assert.Equal('a', r2.Ok.Value[2]);
}