public bool MoveNext()
{
if (copyManager.IsEndOfTheLine)
{
if (isEndOfTheLine)
{
return(false);
}
var hasAny = source.MoveNext();
if (hasAny)
{
copyManager.Add(source.Current);
}
else
{
isEndOfTheLine = true;
source.Dispose();
}
return(hasAny);
}
else
{
/* the return value must be ignored and "true" returned because the presence of
* of an item will be checked on next invocation of the current method.
* if there isn't any, it will attempt to read it from the source enumerable */
copyManager.MoveNext();
return(true);
}
}
public void IteratingOverItems__When_SourceIsNotEmpty_ShouldReturnAllItemsInTheSource(IList <string> values)
{
target = new WritingEnumerator <string>(values);
foreach (var value in values)
{
target.MoveNext();
Assert.AreEqual(value, target.Current);
}
}
public void Current__When_SourceIsNotEmptyInitially_WhenAnItemIsAdded_TheItemMustBeTheCurrentItem(
IList <string> source,
IList <string> values)
{
target = new WritingEnumerator <string>(values);
foreach (var value in values)
{
target.MoveNext();
Assert.AreEqual(value, target.Current);
}
}
public void FullEnumeration__When_SourceIsEmptyInitially_When_ItemsAreAdded__AndPositionIsReset__MustReturnEveryItem_InTheOriginalSequence(
IList <string> values)
{
var source = new List <string>();
target = new WritingEnumerator <string>(source);
foreach (var value in values)
{
target.Add(value);
}
target.ResetPosition();
foreach (var value in values)
{
target.MoveNext();
Assert.AreEqual(value, target.Current);
}
}
