// read -> compare -> change -> write -> read -> compare -> rollback -> write
public void ReadLine_WriteTest()
{
DatabaseStorage <int, string> storage = new DatabaseStorage <int, string>();
List <Word> words = storage.ReadLine(42, 5);
Word word42 = words[0];
Employee employee = (Employee)Util.ByteArrayToObject(word42.Buffer);
Assert.AreEqual(int.Parse(employee.UserID), 42);
Assert.IsTrue(employee.NationalIDNumber.SequenceEqual("339712426 "));
Assert.IsTrue(employee.LoginID.SequenceEqual(@"adventure-works\james0"));
Assert.AreEqual(employee.OrganizationLevel, 4);
Assert.IsTrue(employee.JobTitle.SequenceEqual("Production Technician - WC60 "));
Assert.AreEqual(employee.BirthDate, DateTime.Parse("1978-08-26"));
Assert.IsTrue(employee.MaritalStatus.SequenceEqual("M"));
Assert.IsTrue(employee.Gender.SequenceEqual("M"));
Assert.AreEqual(employee.HireDate, DateTime.Parse("2003-01-28"));
Assert.AreEqual(employee.VacationHours, 39);
Assert.AreEqual(employee.SickLeaveHours, 39);
// temporarily change values
employee.SickLeaveHours = 50;
employee.NationalIDNumber = "123456789 ";
byte[] buf = Util.ObjectToByteArray(employee);
storage.WriteWord(42, buf);
List <Word> wordsWritten = storage.ReadLine(42, 5);
Word word42Written = wordsWritten[0];
Employee employeeWritten = (Employee)Util.ByteArrayToObject(word42Written.Buffer);
Assert.AreEqual(int.Parse(employeeWritten.UserID), 42);
Assert.IsTrue(employeeWritten.NationalIDNumber.SequenceEqual("123456789 "));
Assert.IsTrue(employeeWritten.LoginID.SequenceEqual(@"adventure-works\james0"));
Assert.AreEqual(employeeWritten.OrganizationLevel, 4);
Assert.IsTrue(employeeWritten.JobTitle.SequenceEqual("Production Technician - WC60 "));
Assert.AreEqual(employeeWritten.BirthDate, DateTime.Parse("1978-08-26"));
Assert.IsTrue(employeeWritten.MaritalStatus.SequenceEqual("M"));
Assert.IsTrue(employeeWritten.Gender.SequenceEqual("M"));
Assert.AreEqual(employeeWritten.HireDate, DateTime.Parse("2003-01-28"));
Assert.AreEqual(employeeWritten.VacationHours, 39);
Assert.AreEqual(employeeWritten.SickLeaveHours, 50);
// rollback original values
employeeWritten.SickLeaveHours = 39;
employeeWritten.NationalIDNumber = "339712426 ";
buf = Util.ObjectToByteArray(employeeWritten);
storage.WriteWord(42, buf);
}