public void TripleEntryEnumerable()
{
var list = new List <string> {
"x", "y", "z"
};
var subject = new MetaEnumerable <string>(list);
using (IEnumerator <MetaEnumerable <string> .Entry> iterator = subject.GetEnumerator())
{
Assert.IsTrue(iterator.MoveNext());
Assert.IsTrue(iterator.Current.IsFirst);
Assert.IsFalse(iterator.Current.IsLast);
Assert.AreEqual("x", iterator.Current.Value);
Assert.AreEqual(0, iterator.Current.Index);
Assert.IsTrue(iterator.MoveNext());
Assert.IsFalse(iterator.Current.IsFirst);
Assert.IsFalse(iterator.Current.IsLast);
Assert.AreEqual("y", iterator.Current.Value);
Assert.AreEqual(1, iterator.Current.Index);
Assert.IsTrue(iterator.MoveNext());
Assert.IsFalse(iterator.Current.IsFirst);
Assert.IsTrue(iterator.Current.IsLast);
Assert.AreEqual("z", iterator.Current.Value);
Assert.AreEqual(2, iterator.Current.Index);
Assert.IsFalse(iterator.MoveNext());
}
}
public void SingleEntryEnumerableViaCreate()
{
var list = new List <string> {
"x"
};
TestSingleEntry(MetaEnumerable.Create(list));
}
public void EmptyEnumerable()
{
var emptyList = new List <string>();
var subject = new MetaEnumerable <string>(emptyList);
using (IEnumerator <MetaEnumerable <string> .Entry> iterator = subject.GetEnumerator())
{
Assert.IsFalse(iterator.MoveNext());
}
}
private static void TestSingleEntry(MetaEnumerable <string> subject)
{
using (IEnumerator <MetaEnumerable <string> .Entry> iterator = subject.GetEnumerator())
{
Assert.IsTrue(iterator.MoveNext());
Assert.IsTrue(iterator.Current.IsFirst);
Assert.IsTrue(iterator.Current.IsLast);
Assert.AreEqual("x", iterator.Current.Value);
Assert.AreEqual(0, iterator.Current.Index);
Assert.IsFalse(iterator.MoveNext());
}
}
public void SingleEntryUntypedEnumerable()
{
var list = new List <string> {
"x"
};
IEnumerable subject = new MetaEnumerable <string>(list);
int index = 0;
foreach (MetaEnumerable <string> .Entry item in subject)
{ // only expecting 1
Assert.AreEqual(0, index++);
Assert.AreEqual("x", item.Value);
Assert.IsTrue(item.IsFirst);
Assert.IsTrue(item.IsLast);
Assert.AreEqual(0, item.Index);
}
Assert.AreEqual(1, index);
}
