public void TakeWhile4(int startFrom, int count)
{
Func <int, bool> takeWhilePredicate = i => i < 20;
Func <int, int> select1 = i => i * 3;
Func <int, int> select2 = i => i * 5;
Func <int, int> select3 = i => i * 7;
Func <int, int> select4 = i => i * 11;
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Select(select1).Select(select2).TakeWhile(takeWhilePredicate).Select(select3),
LowCostEnumerable.Range(startFrom, count).Select(select1).Select(select2).TakeWhile(takeWhilePredicate).Select(select3)
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Select(select1).Select(select2).TakeWhile(takeWhilePredicate).Select(select3),
LowCostEnumerable.Range(startFrom, count).Select(select1).Select(select2).TakeWhile(takeWhilePredicate).Select(select3).ToArray()
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Select(select1).Select(select2).TakeWhile(takeWhilePredicate).Select(select3).Select(select4),
LowCostEnumerable.Range(startFrom, count).Select(select1).Select(select2).TakeWhile(takeWhilePredicate).Select(select3).Select(select4)
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Select(select1).Select(select2).TakeWhile(takeWhilePredicate).Select(select3).Select(select4),
LowCostEnumerable.Range(startFrom, count).Select(select1).Select(select2).TakeWhile(takeWhilePredicate).Select(select3).Select(select4).ToArray()
);
}
public void Select(int startFrom, int count)
{
Func <int, int> select1 = i => i * 3;
Func <int, int> select2 = i => i * 5;
Func <int, int> select3 = i => i * 7;
Func <int, int> select4 = i => i * 11;
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Select(select1),
LowCostEnumerable.Range(startFrom, count).Select(select1)
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Select(select1),
LowCostEnumerable.Range(startFrom, count).Select(select1).ToArray()
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Select(select1).Select(select2),
LowCostEnumerable.Range(startFrom, count).Select(select1).Select(select2)
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Select(select1).Select(select2),
LowCostEnumerable.Range(startFrom, count).Select(select1).Select(select2).ToArray()
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Select(select1).Select(select2).Select(select3),
LowCostEnumerable.Range(startFrom, count).Select(select1).Select(select2).Select(select3)
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Select(select1).Select(select2).Select(select3),
LowCostEnumerable.Range(startFrom, count).Select(select1).Select(select2).Select(select3).ToArray()
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Select(select1).Select(select2).Select(select3).Select(select4),
LowCostEnumerable.Range(startFrom, count).Select(select1).Select(select2).Select(select3).Select(select4)
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Select(select1).Select(select2).Select(select3).Select(select4),
LowCostEnumerable.Range(startFrom, count).Select(select1).Select(select2).Select(select3).Select(select4).ToArray()
);
}
public void LowCostEnumerableMethods()
{
Assert.Throws <ArgumentOutOfRangeException>(() => LowCostEnumerable.Range(0, -1));
Assert.Throws <ArgumentOutOfRangeException>(() => LowCostEnumerable.Range(1, Int32.MaxValue));
Assert.Throws <ArgumentOutOfRangeException>(() => LowCostEnumerable.Range(10, Int32.MaxValue));
}
public void Where(int startFrom, int count)
{
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count),
LowCostEnumerable.Range(startFrom, count)
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count),
LowCostEnumerable.Range(startFrom, count).ToArray()
);
Assert.AreEqual(
Enumerable.Range(startFrom, count).FirstOrDefault(),
LowCostEnumerable.Range(startFrom, count).FirstOrDefault()
);
Func <int, bool> predicate1 = i => i != 1 && i != 2;
Func <int, bool> predicate2 = i => i != 3 && i != 4;
Func <int, bool> predicate3 = i => i != 5 && i != 6;
Func <int, bool> predicate4 = i => i != 7 && i != 8;
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Where(predicate1),
LowCostEnumerable.Range(startFrom, count).Where(predicate1)
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Where(predicate1),
LowCostEnumerable.Range(startFrom, count).Where(predicate1).ToArray()
);
Assert.AreEqual(
Enumerable.Range(startFrom, count).Where(predicate1).FirstOrDefault(),
LowCostEnumerable.Range(startFrom, count).Where(predicate1).FirstOrDefault()
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Where(predicate1).Where(predicate2),
LowCostEnumerable.Range(startFrom, count).Where(predicate1).Where(predicate2)
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Where(predicate1).Where(predicate2),
LowCostEnumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).ToArray()
);
Assert.AreEqual(
Enumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).FirstOrDefault(),
LowCostEnumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).FirstOrDefault()
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).Where(predicate3),
LowCostEnumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).Where(predicate3)
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).Where(predicate3),
LowCostEnumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).Where(predicate3).ToArray()
);
Assert.AreEqual(
Enumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).Where(predicate3).FirstOrDefault(),
LowCostEnumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).Where(predicate3).FirstOrDefault()
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).Where(predicate3).Where(predicate4),
LowCostEnumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).Where(predicate3).Where(predicate4)
);
CollectionAssert.AreEqual(
Enumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).Where(predicate3).Where(predicate4),
LowCostEnumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).Where(predicate3).Where(predicate4).ToArray()
);
Assert.AreEqual(
Enumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).Where(predicate3).Where(predicate4).FirstOrDefault(),
LowCostEnumerable.Range(startFrom, count).Where(predicate1).Where(predicate2).Where(predicate3).Where(predicate4).FirstOrDefault()
);
}
public void Range(int startFrom, int count)
{
LowCostEnumerable.Range(startFrom, count);
}
