public void MapTest() { // Given var a = new[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 }; // When var b = a.Map(x => x.ToString()); var c = a.Map(x => System.Math.Sqrt(x)); // Then Assert.AreEqual(b.Length, a.Length); Assert.AreEqual(c.Length, a.Length); Assert.AreEqual("1", b[0]); Assert.AreEqual(3, c[c.Length - 1]); }