public void Add7ItemsDuplicates_Remove3Items_Max2Items()
{
// Arrange
var items = FirstLastListFactory.Create <Product>();
items.Add(new Product(0.50m, "coffee"));
items.Add(new Product(1.20m, "mint drops"));
items.Add(new Product(1.20m, "beer"));
items.Add(new Product(2.22m, "chocolate"));
items.Add(new Product(0.50m, "candy"));
items.Add(new Product(0.01m, "cent"));
items.Add(new Product(1.20m, "cola"));
// Act
var countRemoved = items.RemoveAll(new Product(1.20m, null));
var returnedItems = items.Max(3).Select(p => p.Title).ToList();
// Assert
Assert.AreEqual(3, countRemoved);
var expectedItems = new string[] { "chocolate", "coffee", "candy" };
CollectionAssert.AreEqual(expectedItems, returnedItems);
}
public void ComplexTest_AllOperationsProducts()
{
var items = FirstLastListFactory.Create <Product>();
Assert.AreEqual(0, items.Count);
items.Add(new Product(0.50m, "coffee"));
Assert.AreEqual(1, items.Count);
var first = items.First(1).FirstOrDefault();
var last = items.Last(1).FirstOrDefault();
var min = items.Min(1).FirstOrDefault();
var max = items.Max(1).FirstOrDefault();
Assert.AreEqual("coffee", first.Title);
Assert.AreEqual("coffee", last.Title);
Assert.AreEqual("coffee", min.Title);
Assert.AreEqual("coffee", max.Title);
items.Add(new Product(0.50m, "candy"));
Assert.AreEqual(2, items.Count);
first = items.First(1).FirstOrDefault();
last = items.Last(1).FirstOrDefault();
min = items.Min(1).FirstOrDefault();
max = items.Max(1).FirstOrDefault();
Assert.AreEqual("coffee", first.Title);
Assert.AreEqual("candy", last.Title);
Assert.AreEqual("coffee", min.Title);
Assert.AreEqual("coffee", max.Title);
items.Add(new Product(2.99m, "chocolate"));
Assert.AreEqual(3, items.Count);
first = items.First(1).FirstOrDefault();
last = items.Last(1).FirstOrDefault();
min = items.Min(1).FirstOrDefault();
max = items.Max(1).FirstOrDefault();
Assert.AreEqual("coffee", first.Title);
Assert.AreEqual("chocolate", last.Title);
Assert.AreEqual("coffee", min.Title);
Assert.AreEqual("chocolate", max.Title);
items.Add(new Product(0.50m, "candy"));
Assert.AreEqual(4, items.Count);
first = items.First(1).FirstOrDefault();
last = items.Last(1).FirstOrDefault();
min = items.Min(1).FirstOrDefault();
max = items.Max(1).FirstOrDefault();
Assert.AreEqual("coffee", first.Title);
Assert.AreEqual("candy", last.Title);
Assert.AreEqual("coffee", min.Title);
Assert.AreEqual("chocolate", max.Title);
var countRemoved =
items.RemoveAll(new Product(0.50m, "some product"));
Assert.AreEqual(3, countRemoved);
Assert.AreEqual(1, items.Count);
first = items.First(1).FirstOrDefault();
last = items.Last(1).FirstOrDefault();
min = items.Min(1).FirstOrDefault();
max = items.Max(1).FirstOrDefault();
Assert.AreEqual("chocolate", first.Title);
Assert.AreEqual("chocolate", last.Title);
Assert.AreEqual("chocolate", min.Title);
Assert.AreEqual("chocolate", max.Title);
items.Add(new Product(0.50m, "candy"));
Assert.AreEqual(2, items.Count);
first = items.First(1).FirstOrDefault();
last = items.Last(1).FirstOrDefault();
min = items.Min(1).FirstOrDefault();
max = items.Max(1).FirstOrDefault();
Assert.AreEqual("chocolate", first.Title);
Assert.AreEqual("candy", last.Title);
Assert.AreEqual("candy", min.Title);
Assert.AreEqual("chocolate", max.Title);
items.Clear();
Assert.AreEqual(0, items.Count);
items.Add(new Product(2.50m, "beer"));
items.Add(new Product(7.35m, "vodka"));
items.Add(new Product(0.50m, "coffee"));
items.Add(new Product(0.50m, "candy"));
Assert.AreEqual(4, items.Count);
var first2 = items.First(2).Select(p => p.Title).ToList();
var last2 = items.Last(2).Select(p => p.Title).ToList();
var min2 = items.Min(2).Select(p => p.Title).ToList();
var max2 = items.Max(2).Select(p => p.Title).ToList();
CollectionAssert.AreEqual(new string[] { "beer", "vodka" }, first2);
CollectionAssert.AreEqual(new string[] { "candy", "coffee" }, last2);
CollectionAssert.AreEqual(new string[] { "coffee", "candy" }, min2);
CollectionAssert.AreEqual(new string[] { "vodka", "beer" }, max2);
var removedCount = items.RemoveAll(new Product(12345, null));
Assert.AreEqual(0, removedCount);
removedCount = items.RemoveAll(new Product(7.35m, null));
Assert.AreEqual(1, removedCount);
removedCount = items.RemoveAll(new Product(2.50m, null));
Assert.AreEqual(1, removedCount);
Assert.AreEqual(2, items.Count);
first2 = items.First(2).Select(p => p.Title).ToList();
last2 = items.Last(2).Select(p => p.Title).ToList();
min2 = items.Min(2).Select(p => p.Title).ToList();
max2 = items.Max(2).Select(p => p.Title).ToList();
CollectionAssert.AreEqual(new string[] { "coffee", "candy" }, first2);
CollectionAssert.AreEqual(new string[] { "candy", "coffee" }, last2);
CollectionAssert.AreEqual(new string[] { "coffee", "candy" }, min2);
CollectionAssert.AreEqual(new string[] { "coffee", "candy" }, max2);
removedCount = items.RemoveAll(new Product(0.50m, null));
Assert.AreEqual(2, removedCount);
Assert.AreEqual(0, items.Count);
items.Add(new Product(0.50m, "milk"));
items.Add(new Product(1.20m, "amstel"));
items.Add(new Product(1.20m, "xxx"));
Assert.AreEqual(3, items.Count);
first2 = items.First(2).Select(p => p.Title).ToList();
last2 = items.Last(2).Select(p => p.Title).ToList();
min2 = items.Min(2).Select(p => p.Title).ToList();
max2 = items.Max(2).Select(p => p.Title).ToList();
CollectionAssert.AreEqual(new string[] { "milk", "amstel" }, first2);
CollectionAssert.AreEqual(new string[] { "xxx", "amstel" }, last2);
CollectionAssert.AreEqual(new string[] { "milk", "amstel" }, min2);
CollectionAssert.AreEqual(new string[] { "amstel", "xxx" }, max2);
removedCount = items.RemoveAll(new Product(0.50m, null));
Assert.AreEqual(1, removedCount);
Assert.AreEqual(2, items.Count);
removedCount = items.RemoveAll(new Product(1.20m, null));
Assert.AreEqual(2, removedCount);
Assert.AreEqual(0, items.Count);
items.Add(new Product(0.50m, "coffee"));
Assert.AreEqual(1, items.Count);
first = items.First(1).FirstOrDefault();
last = items.Last(1).FirstOrDefault();
min = items.Min(1).FirstOrDefault();
max = items.Max(1).FirstOrDefault();
Assert.AreEqual("coffee", first.Title);
Assert.AreEqual("coffee", last.Title);
Assert.AreEqual("coffee", min.Title);
Assert.AreEqual("coffee", max.Title);
}
