Merge pull request #375 from twalpole/allow_all_kwargs

Empty last hash matches allow any kwargs

Author: JonRowe

lib/rspec/support/method_signature_verifier.rb

@@ -82,7 +82,7 @@ def invalid_kw_args_from(given_kw_args)
         def has_kw_args_in?(args)
           Hash === args.last &&
             could_contain_kw_args?(args) &&
-            args.last.keys.any? { |x| x.is_a?(Symbol) }
+            (args.last.empty? || args.last.keys.any? { |x| x.is_a?(Symbol) })
         end
 
         # Without considering what the last arg is, could it

spec/rspec/support/method_signature_verifier_spec.rb

@@ -732,6 +732,7 @@ def arity_kw_arg_splat(x, **rest); end
               expect(valid?(nil, :x => 1)).to eq(true)
               expect(valid?(nil, :x => 1, :y => 2)).to eq(true)
               expect(valid?(:x => 1)).to eq(true)
+              expect(valid?(nil, {})).to eq(true)
 
               expect(valid?).to eq(false)
               expect(valid?(nil, nil)).to eq(false)