I'm not sure how to write a subject for this, so sorry if it's confusing.
It's best to just show an example. I'm having the following problem with
RSpec 3.4.0 and Ruby 1.9.3.
*Given this RSpec config:*
RSpec.configure do |config|
config.mock_with :rspec
config.run_all_when_everything_filtered = true
config.filter_run :focus
end
*And these tests:*
it 'test1' do
test_obj = double
test_hash = { a: 3 }
expect(test_obj).to receive(:get).with(a_hash_including(test_hash)).
and_return(5)
test_hash[:a] = 4
expect(test_obj).to receive(:get).with(a_hash_including(test_hash)).
and_return(6)
expect(test_obj.get({ a: 3 })).to eq(5)
expect(test_obj.get({ a: 4 })).to eq(6)
end
it 'test2' do
test_obj = double
test_hash = { a: 3 }
expect(test_obj).to receive(:get).with(a_hash_including(test_hash)).
and_return(5)
test_hash_dup = test_hash.dup
test_hash_dup[:a] = 4
expect(test_obj).to receive(:get).with(a_hash_including(
test_hash_dup)).and_return(6)
expect(test_obj.get({ a: 3 })).to eq(5)
expect(test_obj.get({ a: 4 })).to eq(6)
end
*test1 fails with:*
Failure/Error: expect(test_obj.get({ a: 3 })).to eq(5)
#<Double (anonymous)> received :get with unexpected arguments
expected: (a hash including {:a => 4})
got: ({:a=>3})
Diff:
@@ -1,2 +1,2 @@
-["a hash including {:a => 4}"]
+[{:a=>3}]
*test2 succeeds.*
test2 is almost identical to test1, with the only difference being that I
make a copy of the hash I'm setting a constraint with before mutating it
and passing it to the matcher and constraint.
This was *very *unintuitive to me, and took a while to figure out (I got
lucky honestly).
Is this a bug? If not, is there a part of the documentation that explains
this?
Thanks!
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