feat: Set expected interactions on mock service but without writing t…

…hem to pact file (#210)

lib/pact/consumer/consumer_contract_builder.rb

@@ -25,6 +25,10 @@ def initialize(attributes)
         @mock_service_base_url = "http://#{attributes[:host]}:#{attributes[:port]}"
       end
 
+      def without_writing_to_pact
+        interaction_builder.without_writing_to_pact
+      end
+
       def given(provider_state)
         interaction_builder.given(provider_state)
       end

lib/pact/consumer/interaction_builder.rb

@@ -13,6 +13,12 @@ def initialize &block
         @callback = block
       end
 
+      def without_writing_to_pact
+        interaction.metadata ||= {}
+        interaction.metadata[:write_to_pact] = false
+        self
+      end
+
       def upon_receiving description
         @interaction.description = description
         self

spec/lib/pact/consumer/interaction_builder_spec.rb

@@ -88,6 +88,21 @@ module Consumer
           subject.will_respond_with response
         end
       end
+
+      describe "without_writing_to_pact" do
+        it "sets the write_to_pact key to false on metadata" do
+          mock_metadata = {}
+          expect(interaction).to receive(:metadata).and_return(nil, mock_metadata)
+
+          subject.without_writing_to_pact
+
+          expect(mock_metadata).to eq({ write_to_pact: false })
+        end
+
+        it "returns itself" do
+          expect(subject.without_writing_to_pact).to be(subject)
+        end
+      end
     end
   end
 end