Allow Proc as comparison operator for :be_filtered

Author: claudiob

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    rspec-api-matchers (0.6.2)
+    rspec-api-matchers (0.6.3)
       activesupport
       rack
       rspec

lib/rspec-api/matchers/filter/matcher.rb

@@ -45,7 +45,13 @@ def has_one_object?
 
         def is_filtered?
           values = json.map{|item| item[field]}
-          values.all?{|v| v.send compare_with, value}
+          values.all? do |v|
+            if compare_with.is_a?(Proc)
+              compare_with.call value, v
+            elsif compare_with.is_a?(Symbol)
+              v.send compare_with, value
+            end
+          end
         end
 
         def reverse?

lib/rspec-api/matchers/version.rb

@@ -1,5 +1,5 @@
 module RSpecApi
   module Matchers
-    VERSION = '0.6.2'
+    VERSION = '0.6.3'
   end
 end

spec/rspec-api/matchers/be_filtered_spec.rb

@@ -33,10 +33,15 @@
     context 'given a JSON collection with 2 items with id < 5' do
       before { response.body = '[{"id":2},{"id":3,"name":"two"}]' }
 
-      it 'passes given the right comparison method' do
+      it 'passes given the right comparison method (symbol)' do
         expect(response).to be_filtered by: :id, value: 5, compare_with: :<
       end
 
+      it 'passes given the right comparison method (proc)' do
+        cmp = -> expected, actual {actual < expected}
+        expect(response).to be_filtered by: :id, value: 5, compare_with: cmp
+      end
+
       it 'fails given the wrong comparison method' do
         expect {
           expect(response).to be_filtered by: :id, value: 5, compare_with: :>