I am a newcomer to writing automated unit tests using Rhino Mocks and
I'd appreciate any help I can get here.
I’m testing a class called ClientSearchPresenter. The
ClientSearchPresenter class has a property of type IClientSearchView,
which has two private events.
I’m stuck testing the OnViewLoaded method. It wires up two methods in
the presenter as event handlers to the View property’s events, then
calls a private method.
I want to test whether the event handlers have been successfully
attached. I have no freakin' idea how to do this, unfortunately.
Does anyone know of a way to access the property, get its events and
see whether there are any event handlers attached?
Alternatively, I could just call the events and then test whether the
code that they run has executed. I don’t know how to do this from my
test code, either, though. Does anyone have any ideas?
The following is
- code for the class being tested
- code for the interface that the property I want to access (the one
with the private events)
- my test code so far.
Public Class ClientSearchPresenter
Inherits Presenter(Of IClientSearchView)
Public Sub New(<Dependency()> ByVal controller As
IClientSearchController)
_controller = controller
End Sub
Private _controller As IClientSearchController
Public ReadOnly Property Controller() As
IClientSearchController
Get
Return _controller
End Get
End Property
Public Overrides Sub OnViewLoaded()
AddHandler View.ClearClicked, AddressOf View_ClearClicked
AddHandler View.SearchClicked, AddressOf
View_SearchClicked
LoadKeyOnView()
End Sub
Private Sub View_ClearClicked(ByVal sender As Object, ByVal e
As EventArgs)
Controller.ClearSearch()
LoadKeyOnView()
End Sub
Private Sub View_SearchClicked(ByVal sender As Object, ByVal e
As DataEventArgs(Of ClientSearchKeyDocument))
Controller.SearchForClient(e.Data)
LoadKeyOnView()
End Sub
Private Sub LoadKeyOnView()
View.Key = Controller.SelectForSearch()
End Sub
End Class
Public Interface IClientSearchView
Event ClearClicked As EventHandler
Event SearchClicked As EventHandler(Of DataEventArgs(Of
ClientSearchKeyDocument))
WriteOnly Property Key() As ClientSearchKeyDocument
End Interface
''<summary>
''A test for OnViewLoaded
''</summary>
<TestMethod()> _
Public Sub ClientSearchPresenter_OnViewLoadedTest()
mocks = New MockRepository()
mockState = New PrePostMockState()
mockNavigator = New NavigatorMock(mockState)
Dim controller As ClientSearchController
' Have RhinoMocks dynamically generate a controller for use in
the presenter's constructor
controller = mocks.Stub(Of ClientSearchController)
(mockNavigator)
' The onViewLoaded method will access a method on the
presenter's View property, so
' we need to mock one up.
Dim mockView As IClientSearchView
mockView = mocks.Stub(Of IClientSearchView)()
Dim fakeKey As New ClientSearchKeyDocument()
mockView.Key = fakeKey
Dim target As ClientSearchPresenter = New ClientSearchPresenter
(controller)
' target.View is instantiated as Nothing, so need to set a
view for it to access
target.View = mockView
target.OnViewLoaded()
' TODO – I want to access the events in the target.View object
and see if they
' have event handlers attached here - How?
' TODO – alternatively, I want to raise an event that should
be handled by the
' target.View and see if it hits the method in the presenter –
how?
End Sub
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