Change logic test for GeojsonServiceSpec

spec/services/geojson_service_spec.rb

@@ -2,22 +2,13 @@ require 'spec_helper'
 
 describe GeojsonService do
   describe '.toGeoJsonPolygon' do
-
+    subject { JSON.parse(described_class.to_json_polygon coordinates) }
-    let(:to_polygon_return) {
-      {
-          geo: {
-              type: "Polygon",
-              coordinates: [coordinates]
-          }
-      }.to_json
-    }
-
-    subject { described_class.to_json_polygon coordinates }
 
     describe 'coordinates are empty' do
       let(:coordinates) { '' }
 
-      it { expect(subject).to eq(to_polygon_return) }
+      it { expect(subject['geo']['type']).to eq('Polygon') }
+      it { expect(subject['geo']['coordinates']).to eq([coordinates]) }
     end
 
     describe 'coordinates are informed' do
@@ -36,7 +27,8 @@ describe GeojsonService do
         ]
       }
 
-      it { expect(subject).to eq(to_polygon_return) }
+      it { expect(subject['geo']['type']).to eq('Polygon') }
+      it { expect(subject['geo']['coordinates']).to eq([coordinates]) }
     end
   end
 end