public void IncludesLastOnly()
{
var enumerator = new[] { 1, 3, 6 }.GetEnumerator();
var filter = new FilteringEnumerator(enumerator, new IsNumberEvenTest());
Assert.IsTrue(filter.MoveNext());
// Current element must be 6
Assert.AreEqual((int)filter.Current, 6);
}
public void MoveNextFirstCallTest()
{
var enumerator = new[] { 2, 4, 6 }.GetEnumerator();
var filter = new FilteringEnumerator(enumerator, new IsNumberEvenTest());
Assert.IsTrue(filter.MoveNext());
// Current element must be 2
Assert.AreEqual((int)filter.Current, 2);
}
public void ResetTest()
{
var enumerator = new[] { 2, 4, 6 }.GetEnumerator();
var filter = new FilteringEnumerator(enumerator, new IsNumberEvenTest());
Assert.IsTrue(filter.MoveNext());
Assert.IsTrue(filter.MoveNext());
filter.Reset();
Assert.IsTrue(filter.MoveNext() && (int)filter.Current == 2);
}
public void MoveNextPastEndTests()
{
var enumerator = new[] { 2, 4, 6 }.GetEnumerator();
var filter = new FilteringEnumerator(enumerator, new IsNumberEvenTest());
Assert.IsTrue(filter.MoveNext());
Assert.IsTrue(filter.MoveNext());
Assert.IsTrue(filter.MoveNext());
Assert.IsFalse(filter.MoveNext());
Assert.IsFalse(filter.MoveNext());
}
public void TestEvenNumbers()
{
var allNumbers = new List <object> {
2, 3, 4, 5, 6, 7
}.GetEnumerator();
var evenNum = new EvenNumber();
FilteringEnumerator filter = new FilteringEnumerator(allNumbers, evenNum);
filter.MoveNext();
Assert.AreEqual(2, filter.Current);
filter.MoveNext();
Assert.AreEqual(4, filter.Current);
}
