How to return different mocks for different ctors?

Hi,

If you want to use specific contractor you should use the overload of Fake.Instance that let you specify the constructor arguments.
Also note that inside WhenCalled you can't use "new SPSite", instead you should use the fakes you created with Isolate.Fake.Instance

Example

Guid g = Guid.NewGuid();
var fakeSite = Isolate.Fake.Instance<SPSite>(Members.ReturnRecursiveFakes, ConstructorWillBe.Called, "specific string");
var fakeSite2 = Isolate.Fake.Instance<SPSite>(Members.ReturnRecursiveFakes, ConstructorWillBe.Called, g);

Isolate.WhenCalled(() => fakeSite.SomeMethod()).IgnoreCall();
// ...

Please let me know if it helps.

Hi
thanks for quick response, however provided Fake overload with Constructor.WillBeCalled will call ctor of SPSite, which is not what i want (in fact, it will break tests on build machine, where Sharepoint is not installed).

What I want is to return different fakes when different ctors are invoked (with specific, exact arguments), just like when using Isolate.WhenCalled().WithExactArguments().

Can i achieve this with TypeMock, without actually calling original ctors (as is currently with Constructor.WillBeCalled).

Method under test looks something like this:

void F1()
{
new SPSite(url1).OpenWeb()
new SPSite(url1).OpenWeb()
}

I want to test this method and must set up different expectations on each returned SPSite, based on ctor arguments (and calling original objects even partually is not an option)

Correcting typo, of course strings passed to ctors are different:

void F1()
{
new SPSite(url1).OpenWeb()
new SPSite(url2).OpenWeb()
}

Hi,

You can fake the SPSite instances based on the order that they are called.
This is not the best solution but until we'll implement the feature the workaround should work.

[Test, Isolated]
public void TestSP()
{  
   var fake1 = Isolate.Fake.Instance<SPSite>();
   var fake2 = Isolate.Fake.Instance<SPSite>();
   
   Isolate.WhenCalled(()=> fake1.OpenWeb()).WillReturn(fakeWeb1);
   Isolate.WhenCalled(()=> fake2.OpenWeb()).WillReturn(fakeWeb2);
   
   Isolate.Swap.NextInstance<SPSite>().With(fake1);
   Isolate.Swap.NextInstance<SPSite>().With(fake2);
   
     //call SomeClass.F1() ...
}

Hi,

You can fake the SPSite instances based on the order that they are called.
This is not the best solution but until we'll implement the feature the workaround should work.

Ok, thank you for stright answer. Can you at least tell me estimated timewindow for that feature? I'd like to know if I can write such veeeeery fragile tests because in a month or two there will be fix or forget about it.

Hi,

Sorry I don't know the time frame for the feature as we just released a new version this week.
However we are releasing new versions quit frequently and I hope we'll implement it in one of our upcoming versions.

Sorry I don't know the time frame for the feature as we just released a new version this week.
However we are releasing new versions quit frequently and I hope we'll implement it in one of our upcoming versions.

Please let me know in this thread if you will know that some upcoming version of TypeMock supports returning different mocks based on ctor params.