Bad error message using rspec's #=~ on hashes

output

pete@balloon:~/projects/rspec-expectations$ rspec rspec_test.rb 
FF

Failures:

  1) Hash #=~ displays confusing error message when hashes are equal
     Failure/Error: actual.should =~ actual
       expected: {:foo=>"bar"}
            got: {:foo=>"bar"} (using =~)
       Diff:{:foo=>"bar"}.==({:foo=>"bar"}) returned false even though the diff between {:foo=>"bar"} and {:foo=>"bar"} is empty. Check the implementation of {:foo=>"bar"}.==.
     # ./lib/rspec/expectations/fail_with.rb:33:in `fail_with'
     # ./lib/rspec/matchers/operator_matcher.rb:47:in `fail_with_message'
     # ./lib/rspec/matchers/operator_matcher.rb:69:in `__delegate_operator'
     # ./lib/rspec/matchers/operator_matcher.rb:59:in `eval_match'
     # ./lib/rspec/matchers/operator_matcher.rb:28:in `block in use_custom_matcher_or_delegate'
     # ./rspec_test.rb:5:in `block (2 levels) in <top (required)>'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example.rb:114:in `instance_eval'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example.rb:114:in `block in run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example.rb:254:in `with_around_each_hooks'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example.rb:111:in `run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example_group.rb:388:in `block in run_examples'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example_group.rb:384:in `map'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example_group.rb:384:in `run_examples'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example_group.rb:369:in `run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/command_line.rb:28:in `block (2 levels) in run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/command_line.rb:28:in `map'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/command_line.rb:28:in `block in run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/reporter.rb:34:in `report'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/command_line.rb:25:in `run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/runner.rb:80:in `run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/runner.rb:17:in `block in autorun'

  2) Hash #=~ displays correct error message when hashes differ
     Failure/Error: actual.should =~ expected
       expected: {:bar=>"baz"}
            got: {:foo=>"bar"} (using =~)
       Diff:
       @@ -1,2 +1,2 @@
       -:bar => "baz"
       +:foo => "bar"
     # ./lib/rspec/expectations/fail_with.rb:33:in `fail_with'
     # ./lib/rspec/matchers/operator_matcher.rb:47:in `fail_with_message'
     # ./lib/rspec/matchers/operator_matcher.rb:69:in `__delegate_operator'
     # ./lib/rspec/matchers/operator_matcher.rb:59:in `eval_match'
     # ./lib/rspec/matchers/operator_matcher.rb:28:in `block in use_custom_matcher_or_delegate'
     # ./rspec_test.rb:12:in `block (2 levels) in <top (required)>'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example.rb:114:in `instance_eval'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example.rb:114:in `block in run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example.rb:254:in `with_around_each_hooks'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example.rb:111:in `run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example_group.rb:388:in `block in run_examples'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example_group.rb:384:in `map'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example_group.rb:384:in `run_examples'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/example_group.rb:369:in `run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/command_line.rb:28:in `block (2 levels) in run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/command_line.rb:28:in `map'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/command_line.rb:28:in `block in run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/reporter.rb:34:in `report'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/command_line.rb:25:in `run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/runner.rb:80:in `run'
     # /home/pete/.rvm/gems/ruby-1.9.3-p327@rspec-expectations/bundler/gems/rspec-core-e227bb4bf288/lib/rspec/core/runner.rb:17:in `block in autorun'

Finished in 0.00081 seconds
2 examples, 2 failures

Failed examples:

rspec ./rspec_test.rb:2 # Hash #=~ displays confusing error message when hashes are equal
rspec ./rspec_test.rb:8 # Hash #=~ displays correct error message when hashes differ

rspec_test.rb

describe Hash do     
  it "#=~_match displays confusing error message when hashes are equal" do     
    actual = {:foo => 'bar'}    
     
    actual.should =~ actual    
  end     
     
  it "#=~ displays correct error message when hashes differ" do     
    actual = {:foo => 'bar'}    
    expected = {:bar => 'baz'}    
     
    actual.should =~ expected    
  end     
end