public void Exists() { var bag1 = new Bag <double>(new[] { 4.5, 187.4, 1.2, 7.6, -7.6, -0.04, 1.2, 1.78, 10.11, 187.4 }); Assert.IsTrue(bag1.Exists(d => d > 100)); Assert.IsTrue(bag1.Exists(d => Math.Abs(d) == 0.04)); Assert.IsFalse(bag1.Exists(d => d < -10.0)); bag1.Clear(); Assert.IsFalse(bag1.Exists(d => Math.Abs(d) == 0.04)); }