All,
I have been going back and form with the team at Telerik that put out
JustMock as I am evaluating several mocking frameworks right now. I spend
most of my day working in business layer logic in IIS hosted WCF services.
I am attempting to break my SQL server dependecy in my unit tests by
mocking out the db context. A Rhino Mocks users essentially achieved what I
am looking for here in 2009 using an old implementation of OpenAccess
here:
http://www.reversealchemy.net/blog/2009/03/17/exploring-telerik-openaccess-unit-testing-your-business-logic-using-rhino-mocks/.
The issue is several fold but the root of it is that OA
has fundamentally changed its implementation since then and I cannot seem
to get it to jive quite right with either JustMock or not Rhino Mocks. I
have emailed the original author of the article to see if he has an updated
example and will post his response here should he respond. Ultimately what
it boils down to is that I have methods that perform business logic that
may or may not add/update entities (hacked example code below). What I am
trying to achieve (and it simply may not be possible given my end goal and
I apologize as I am relatively new to mocking) is to break the dependency
on a DB on the other end while still leveraging the code as if it were (i.e
Add an entity to the context but not actually commit it OR when an add
occurs on an entity whose ID is a uniqueidentifier (guid), return a new
guid to simulate success which allows the update method to use that
entity's guid to perform the update operation).
Please let me know if you need a more extensive code example. I am hopeful
that Erik's post and the sample methods below will highlight what I am
trying to do, something that I have not yet successfully conveyed to
Telerik.
public static Guid AddUser(string name, int legacyId = -1)
{
try
{
using (var model = new VerifyModel())
{
User userEntity = GetUserEntity(name);
if (userEntity != null)
{
return userEntity.Guid;
}
var newUser = new User
{
Name = name,
LegacyId = legacyId
};
model.Add(newUser);
model.SaveChanges();
UserContainer.Instance.Refresh();
return newUser.Guid;
}
}
catch (Exception exception)
{
ErrorLogWriter.Write(MethodBase.GetCurrentMethod().Name,
exception);
}
return Guid.Empty;
}
Update method handles optimistic verification exceptions but at the end of
the day simply performs a sql update.
public static bool UpdateUserDetails(Guid userGuid,
IEnumerable<ElementAttributeValues> elementAttributeValues)
{
try
{
var historyEvents = new List<string>();
using (var model = new VerifyModel())
{
var user = model.Users.SingleOrDefault(p => p.Guid ==
userGuid);
if (user == null)
{
return false;
}
var enumeratedElementAttributeValues =
elementAttributeValues asList<ElementAttributeValues> ??
elementAttributeValues.ToList();
try
{
UpdateUserEntity(enumeratedElementAttributeValues,
ref user, refhistoryEvents);
model.SaveChanges();
}
catch (OptimisticVerificationException
optimisticVerificationException)
{
ErrorLogWriter.Write(string.Format("An optimistic
verification exception occured in {0} and the commit will be retried. The
error message is: {1}.",
MethodBase.GetCurrentMethod().Name,
optimisticVerificationException.Message));
model.Refresh(RefreshMode.OverwriteChangesFromStore,
user);
// retry update
UpdateUserEntity(enumeratedElementAttributeValues,
ref user, refhistoryEvents);
model.SaveChanges();
}
foreach (string historyEvent in historyEvents)
{
HistoryWriter.Write(userGuid, historyEvent);
}
return true;
}
}
catch (Exception exception)
{
ErrorLogWriter.Write(MethodBase.GetCurrentMethod().Name,
exception);
}
return false;
}
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