On Feb 1, 2011, at 3:40 AM, James OBrien wrote: > hey, thanks for reading: > > I have a problem which can be reduced to this, > > from within an example of mine I call the helper 'expect_call' which is > defined thus: > > def expect_call(hash) > obj.should_receive(:some_ > method).with(hash) > end > > and in one of my examples the 'expected' hash is strictly defined as follows > > expect_call({ > :some_key => [1,2,3] > }) > > however my spec fails because it is actually called with > > { > :some_key => [1,3,2] > } > > or maybe > > { > :some_key => [2,3,1] > } > > or > > { > :some_key => [2,1,3] > } > > i.e. the array part is not in the order i 'expect' BUT i don't actually care > about the order. So I would like to be able to change my one example to > something like this: > > expect_call({ > :some_key => [1,2,3].ignoring_order > }) > > does such a concept exist or do I have to change the implementation of > expect_call to use some sort of custom matcher - I am reluctant to do this > since this method is called in other cases where maybe (for arguments sake) I > DO care about array ordering within the hash.
rspec-expectations lets you do this: foo.bar.should =~ [1,2,3] This passes as long as the array contains exactly those three elements in any order. You can use this now in conjunction with rspec-mocks, like this: foo.should_receive(:bar) do |hash| hash[:some_key].should =~ [1,2,3] end It's a bit more verbose than what you're looking for, but it can get you there with rspec as/is today. Going forward, we might want to consider an array_including argument matcher for rspec-mocks. We already have a hash_including matcher that works like this: foo.should_receive(:bar).with(hash_including(:a => 'b')) Similarly we could have: foo.should_receive(:bar).with(array_including(1,2,3)) The only problem with this is the name: array_including could mean different things (ordered/unordered, only these elements or subset, etc). The hash_including matcher is specifically about a subset of a hash. But perhaps we could extend this with something like you proposed above: foo.should_receive(:bar).with(array_including(1,2,3)) foo.should_receive(:bar).with(array_including(1,2,3).ingoring_order) foo.should_receive(:bar).with(array_including(1,2,3).only.ingoring_order) The thing is, I'm not sure this is any better than the example I gave above, which is very precise and works today. Thoughts/opinions welcome. > Hope someone can solve this for me - MUCH appreciation. As an aside, when passing a hash as an argument you don't need to use curly braces, as long as the hash is the last argument to the method. These two are equivalent: expect_call(1, :a, {:some_key => 'some value'}) expect_call(1, :a, :some_key => 'some value') HTH, David
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