public void TestAddHdd()
        {
            DriveMockers.SLDriveTuple = (DriveType_LocalHDD, _comObject.LocalHdds.First());
            _dService.AddDrive();
            Assert.AreEqual(FileSystemService.Current.MountedUnits.Count(), 1);
            Assert.AreEqual(CaseService.Current.CurrentCase.CaseEvidences.Count(), 1);

            //测试移除证据项;
            CaseService.Current.CurrentCase.RemoveCaseEvidence(CaseService.Current.CurrentCase.CaseEvidences.First());

            Assert.AreEqual(FileSystemService.Current.MountedUnits.Count(), 0);
            Assert.AreEqual(CaseService.Current.CurrentCase.CaseEvidences.Count(), 0);
        }