Advnace Mocking Scenarios With Active Record (using Rhino Mocks)
My recent post sparked some discussion in the Castle Mailing List, with some question of how to handle more complex scenarios. I managed to code those without much problem, as you can see below, but a few words first.
This method essentially mocks NHibernate for Active Record. This means that you have to understand what is happening (which is not a bad idea). I'm intimately familiar with both Active Record and NHibernate, and I had to look at the source to see what was happening. If you intend to use this method, I highly recommend that you'll not put the expectations in the test itself, but move the expectation building to the MockScope, so you will be able to do something like:
Update: Added examples for both 2.0 and 1.1
Here are the examples (.Net 2.0):
[TestFixture]
public class Usage
{
MockRepository mocks;
ISession session;
[TestFixtureSetUp]
public void Initialize()
{
IConfigurationSource source = System.Configuration.ConfigurationManager.GetSection("activerecord") as IConfigurationSource; //this for .net 2.0
ActiveRecordStarter.Initialize(typeof(Blog).Assembly, source);
}
[SetUp]
public void SetUp()
{
mocks = new MockRepository();
session = mocks.CreateMock<ISession>();
}
[TearDown]
public void TearDown()
{
mocks.VerifyAll();
}
[Test]
public void UsingMockedScope()
{
Blog mockedBlog = new Blog();
Expect.Call(session.Load(typeof(Blog), 30)).Return(mockedBlog); ;
mocks.ReplayAll();
using (new MockScope(session))
{
Blog blogFromDatabase = Blog.Find(30);
Assert.AreSame(mockedBlog, blogFromDatabase);
}
}
[Test]
public void UsingMockedScope_WithFindAll()
{
Blog mockedBlog = new Blog();
IList returnedList = new ArrayList();
returnedList.Add(mockedBlog);
ICriteria criteria = mocks.CreateMock<ICriteria>();
Expect.Call(session.CreateCriteria(typeof(Blog))).Return(criteria);
Expect.Call(criteria.List()).Return(returnedList);
mocks.ReplayAll();
using (new MockScope(session))
{
Blog[] blogs = Blog.FindAll();
Assert.AreEqual(1, blogs.Length);
Assert.AreSame(mockedBlog, blogs[0]);
}
}
[Test]
public void UsingMockedScope_WithFindByProperty()
{
Blog mockedBlog = new Blog();
IList returnedList = new ArrayList();
returnedList.Add(mockedBlog);
ICriteria criteria = mocks.CreateMock<ICriteria>();
Expect.Call(session.CreateCriteria(typeof(Blog))).Return(criteria);
Expect.Call(criteria.Add(null)).Constraints(
Property.Value("Value", "Ayende @ Blog") & Property.Value("PropertyName", "Name")
).Return(criteria);
Expect.Call(criteria.List()).Return(returnedList);
mocks.ReplayAll();
using (new MockScope(session))
{
Blog[] blogs = Blog.FindAllByProperty("Name", "Ayende @ Blog");
Assert.AreEqual(1, blogs.Length);
Assert.AreSame(mockedBlog, blogs[0]);
}
}
[Test]
public void UsingMockedScope_WithSimpleQuery()
{
Blog mockedBlog = new Blog();
IList returnedList = new ArrayList();
returnedList.Add(mockedBlog);
IQuery query = mocks.CreateMock<IQuery>();
Expect.Call(session.CreateQuery("from Blog b where b.Name = ?")).Return(query);
Expect.Call(query.SetParameter(0, "Ayende @ Blog")).Return(query);
Expect.Call(query.List()).Return(returnedList);
mocks.ReplayAll();
using (new MockScope(session))
{
SimpleQuery<Blog> q = new SimpleQuery<Blog>("from Blog b where b.Name = ?", "Ayende @ Blog");
Blog[] blogs = q.Execute();
Assert.AreEqual(1, blogs.Length);
Assert.AreSame(mockedBlog, blogs[0]);
}
}
}
And here are the examples for .Net 1.1:
[TestFixture]
public class Usage
{
MockRepository mocks;
ISession session;
[TestFixtureSetUp]
public void Initialize()
{
IConfigurationSource source = System.Configuration.ConfigurationManager.GetSection("activerecord") as IConfigurationSource; //this for .net 2.0
ActiveRecordStarter.Initialize(typeof(Blog).Assembly, source);
}
[SetUp]
public void SetUp()
{
mocks = new MockRepository();
session = (ISession)mocks.CreateMock(typeof(ISession));
}
[TearDown]
public void TearDown()
{
mocks.VerifyAll();
}
[Test]
public void UsingMockedScope()
{
Blog mockedBlog = new Blog();
Expect.Call(session.Load(typeof(Blog), 30)).Return(mockedBlog); ;
mocks.ReplayAll();
using (new MockScope(session))
{
Blog blogFromDatabase = Blog.Find(30);
Assert.AreSame(mockedBlog, blogFromDatabase);
}
}
[Test]
public void UsingMockedScope_WithFindAll()
{
Blog mockedBlog = new Blog();
IList returnedList = new ArrayList();
returnedList.Add(mockedBlog);
ICriteria criteria = (ICriteria)mocks.CreateMock(typeof(ICriteria));
Expect.Call(session.CreateCriteria(typeof(Blog))).Return(criteria);
Expect.Call(criteria.List()).Return(returnedList);
mocks.ReplayAll();
using (new MockScope(session))
{
Blog[] blogs = Blog.FindAll();
Assert.AreEqual(1, blogs.Length);
Assert.AreSame(mockedBlog, blogs[0]);
}
}
[Test]
public void UsingMockedScope_WithFindByProperty()
{
Blog mockedBlog = new Blog();
IList returnedList = new ArrayList();
returnedList.Add(mockedBlog);
ICriteria criteria = (ICriteria) mocks.CreateMock(typeof(ICriteria));
Expect.Call(session.CreateCriteria(typeof(Blog))).Return(criteria);
Expect.Call(criteria.Add(null)).Constraints(
Property.Value("Value", "Ayende @ Blog") & Property.Value("PropertyName", "Name")
).Return(criteria);
Expect.Call(criteria.List()).Return(returnedList);
mocks.ReplayAll();
using (new MockScope(session))
{
Blog[] blogs = Blog.FindAllByProperty("Name", "Ayende @ Blog");
Assert.AreEqual(1, blogs.Length);
Assert.AreSame(mockedBlog, blogs[0]);
}
}
[Test]
public void UsingMockedScope_WithSimpleQuery()
{
Blog mockedBlog = new Blog();
IList returnedList = new ArrayList();
returnedList.Add(mockedBlog);
IQuery query = (IQuery)mocks.CreateMock(typeof(IQuery));
Expect.Call(session.CreateQuery("from Blog b where b.Name = ?")).Return(query);
Expect.Call(query.SetParameter(0, "Ayende @ Blog")).Return(query);
Expect.Call(query.List()).Return(returnedList);
mocks.ReplayAll();
using (new MockScope(session))
{
IActiveRecordQuery q = new SimpleQuery(typeof(Blog),"from Blog b where b.Name = ?", "Ayende @ Blog");
Blog[] blogs = (Blog[])q.Execute(session);
Assert.AreEqual(1, blogs.Length);
Assert.AreSame(mockedBlog, blogs[0]);
}
}
}
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