public void ToReadOnly_Empty() { var xs = new List <int>(); var e1 = CollectionExtensions.ToReadOnly <int>(enumerable: null); AssertEmpty(e1); var e2 = Array.Empty <int>().ToReadOnly(); AssertEmpty(e2); var e3 = xs.ToReadOnly(); AssertEmpty(e3); xs.Add(1); AssertEmpty(e3); Assert.AreSame(e1, e2); Assert.AreSame(e2, e3); var e4 = CollectionExtensions.ToReadOnly <int>(enumerable: null); var e5 = Array.Empty <int>().ToReadOnly(); var e6 = new List <int>().ToReadOnly(); Assert.AreSame(e3, e4); Assert.AreSame(e4, e5); Assert.AreSame(e5, e6); }
public void AsCollection_Null() { var xs = default(int[]); var ys = CollectionExtensions.AsCollection(xs); Assert.AreEqual(0, ys.Count); }
public void AsCollection_Array() { var xs = new[] { 2, 3, 5 }; var ys = CollectionExtensions.AsCollection(xs); Assert.AreSame(xs, ys); }
public void AsCollection_Enumerable() { var xs = new[] { 2, 3, 5 }.Select(x => x); var ys = CollectionExtensions.AsCollection(xs); Assert.IsTrue(xs.SequenceEqual(ys)); }
public void AsArray_Null() { var xs = default(int[]); var ys = CollectionExtensions.AsArray(xs); Assert.AreEqual(0, ys.Length); }