JRuby 1.6.2
rspec-core (2.6.4)
rspec-expectations (2.6.0)
rspec-mocks (2.6.0)
rspec-rails (2.6.1)
I'm sure this has more to do with the way JRuby wraps Java exceptions but I
figured I'd post here in case anyone here has any insight or pointers. In the
context of writing a spec for a model like thing that wraps legacy Java code, I
found myself attempting to stub a method on a Java Exception rescued in the
implementation.
eg.
describe '#valid?' do
....
it 'adds validation exceptions raised by service to #errors' do
ve = ValidationException #a java exception
ve.stub(:localized_message).and_return('a bunch of errors')
service.stub(:validateTaskForSave).and_raise(ve)
subject.valid?
subject.errors.should == ['a bunch of errors']
end
the above example fails because the :localize_message stub is ignored and
instead the real implementation receives the message. I know this typically
screams typo but not in this case. Here is a more boiled down version:
specify 'rescued exception message should be "bar" because I stubbed it' do
begin
e = Java::java.lang.NullPointerException.new('foo')
e.stub(:message).and_return('bar')
raise e
rescue Java::java.lang.NullPointerException => e
e.message.should == 'bar'
end
end
Failure/Error: e.message.should == 'bar'
expected: "bar"
got: "foo" (using ==)
That seemed odd to me but maybe moot anyway since in reality I would be need to
rescue a NativeException masquerading as my target exception.
e.g. This code
def valid?
begin
service.validateTaskForSave(task)
rescue ValidationException => e
puts "rescued exception: #{e.class.name}"
.....
prints "rescued exception: NativeException" when hit through the console.
So how would one simulate a NativeException if needed (i.e. you want to stub
methods on it)?
-lenny
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