Comment 2 for bug 532536

OK, thank you!

Note that the observation is not aligned with your
expectation (ExEx subclass not recognized at all).

  Cc.

-----Original Message-----
From: <email address hidden> [mailto:<email address hidden>] On Behalf Of Charlie Poole
Sent: Saturday, October 30, 2010 20:47
To: Petr Kužel
Subject: [Bug 532536] Re: ExpectedException specification

It is not possible to universally determine textual order of attributes based on the metadata alone. Since NUnit tests are driven by the metadata, and not the source code, there is no way to accomplish what you want. (Note: it could be done in a framework-dependent, version- dependent manner, but not across all frameworks and versions)

Further, NUnit expects and allows only _one_ ExpectedExceptionAttribute on a method. The approach of deriving a new attribute from ExpectedException does not cause the new attribute to recognized by NUnit at all.

Charlie

PS: Sorry for the delay, this was inadvertently marked Incomplete some time ago and I only now re-examined it.

** Changed in: nunitv2
       Status: Incomplete => Won't Fix

--
ExpectedException specification
https://bugs.launchpad.net/bugs/532536
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Status in NUnit V2 Test Framework: Won't Fix

Bug description:
I subclassed ExpectedException attribute passing to super constructor AssertionException type.

Now if I attibute my test method with both my subclass and ExpectedException(AssertionException) I get runner and attribute order dependent behaviour:

  - R# runner interpretes all attributes in sequence so a test method body that passes is toggled to failure by the first ExpectedException attribute then the failure is toggled back to pass by the next ExpectedException attribute.

  - Nunit 2.5.3 gui-runner seems to interpret just the first one

for:

    <Test()> <ObservedBehaviour("Code generator produces duplicates.")> <ExpectedException(GetType(AssertionException))> _
    Public Sub ObservedBehaviourAfterChangeTest()

yielding:

     Observed behaviour has been changed. Please balance the value of the change with compatibility breach costs.
     Originally observed behaviour: Code generator produces duplicates.
     NUnit.Framework.AssertionException was expected

while for

    <Test()> <ExpectedException(GetType(AssertionException))> <ObservedBehaviour("Code generator produces duplicates.")> _
    Public Sub ObservedBehaviourAfterChangeTest()

returning:

    NUnit.Framework.AssertionException was expected

The documentation deserves a clarification.

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