Some of my specs fail after adding the rails "memoize" feature to model some
model methods, producing the error "Can't modify frozen class/module" (these
specs all passed before). This only happens if I try to use "and_return"
within my spec, and those returned values affect the output of the method.
I am not trying to change frozen values in my own code; the error is coming
from the spec trying to change a frozen value. Below is an example of the
type of spec for which this problem occurs. (This example is very
simplified and somewhat contrived just to show the issue). Is there a known
problem using memoize when you have message expectations? Any solutions/
best practices here?
Thanks..
Item model contains an attribute called "description" and contains this
method:
def name
if x = description.to_s.match(/User_(\d+)/)
u = User.find(x[1])
description.gsub(x[0], u.username)
else
description
end
end
spec:
it "should substitute user's username into the right place when fetching the
item name" do
i = Item.new(:description => 'foo User_1 bar')
User.stub!(:find).with('1').and_return( mock_model(User, :name => 'a
name') )
i.name.should == 'foo a name bar'
end
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