fix: correct generators import and update specs

lib/pact/provider/request.rb

@@ -61,7 +61,7 @@ def reified_body
         end
 
         def generated_body
-          result = Pact::Provider::Generators.apply_generators(expected_request, "body", reified_body, @state_params)
+          result = Pact::Generators.apply_generators(expected_request, "body", reified_body, @state_params)
 
           case result
           when Hash

spec/lib/pact/provider/generators_spec.rb

@@ -63,6 +63,6 @@
       }
     })
     request = Pact::Provider::Request::Replayable.new(expected_request)
-    expect(request.body['result'][0].length).to eq(8)
+    expect(JSON.parse(request.body)['result'][0].length).to eq(8)
   end
 end

spec/lib/pact/provider/request_spec.rb

@@ -75,9 +75,10 @@
       context "and it uses generators" do
         let(:body) { { a: 'body', b: '2025-04-08' } }
         let(:generators) { {"body"=>{"b"=>{"type"=>"Date"}}} }
+        let(:expected_body) { { a: 'body', b: Date.today.to_s } }
 
         it "returns the object as a json string" do
-          expect(subject.body).to eq body.to_json
+          expect(subject.body).to eq expected_body.to_json
         end
       end
     end