public void FileDoesNotExistMock()
        {
            IFileServise iFile = new MockFileServise();

            Lab1UnitTesting.ReportViewer iReport = new Lab1UnitTesting.ReportViewer(iFile);
            Assert.Throws <FileNotFoundException>(() => iReport.Clean("D:\\ToRead.txt"));
        }
        public void FileExistMock()
        {
            IFileServise iFile = new MockFileServise();

            Lab1UnitTesting.ReportViewer iReport = new Lab1UnitTesting.ReportViewer(iFile);
            iReport.Clean("D:\\VisualStudio2019\\ToRead.txt");
            var tmp      = iReport.usedSize;
            var expected = 100;

            Assert.AreEqual(expected, tmp);
        }