public void ReadValueFromTimeIntervalTest_ValidCodes(string code)
        {
            ReadDataProvider readDataProvider = new ReadDataProvider();

            Assert.Throws <NullReferenceException>(() =>
            {
                readDataProvider.ReadValueFromTimeInterval(DateTime.Now, DateTime.Now, code);
            });
        }
        public void ReadLastValueTest_ValidCodes(string tempCode)
        {
            ReadDataProvider readDataProvider = new ReadDataProvider();

            // string expected = "test";
            //string actual = readDataProvider.ReadLastValue(tempCode);

            Assert.Throws <NullReferenceException>(() =>
            {
                readDataProvider.ReadLastValue(tempCode);
            });
        }