public void ShouldBackupNow_MoreThan7DaysAway_ReturnsTrue()
{
TestableMyTimeBasedClass backup = new TestableMyTimeBasedClass();
backup.LastBackup = new DateTime(2000,1,1);
backup.CurrentTime = new DateTime(2000,1,9);
bool backupNow = backup.ShouldBackupNow();
Assert.IsTrue(backupNow);
}