public void ClockGroupCollectionTest_Clear() { var mf = new MainForm(); var df = mf.MyDataFile; var d = new ClockVMCollection.Model(df); ClockGroupMCollection c = d.Groups; d.AppliedFilter = new FilterM(d); var cl = new TimerData(df, mf.MultiAudioPlayer) { GroupName = "g1" }; d.AddClock(cl); Assert.IsFalse(c.Add("g1")); Assert.IsTrue(c.Clear()); Assert.AreEqual(0, c.Count); Assert.AreEqual("", cl.GroupName); Assert.IsTrue(d.IsUnsaved); }