Wrote specs for QueryType creation

spec/lib/graph_ql/type_creator_spec.rb

@@ -1,7 +1,40 @@
 require 'rails_helper'
 
 describe GraphQL::TypeCreator do
-  let(:type_creator) { GraphQL::TypeCreator.new({}) }
+  let(:api_type_definitions) { {} }
+  let(:type_creator) { GraphQL::TypeCreator.new(api_type_definitions) }
+
+  describe "::query_type" do
+    let(:api_type_definitions) do
+      {
+        ProposalNotification => { fields: { title: 'string' } },
+        Proposal => { fields: { id: 'integer', title: 'string' } }
+      }
+    end
+    let(:query_type) { type_creator.query_type }
+
+    it 'has fields to retrieve single objects whose model fields included an ID' do
+      field = query_type.fields['proposal']
+      proposal_type = type_creator.created_types[Proposal]
+
+      expect(field).to be_a(GraphQL::Field)
+      expect(field.type).to eq(proposal_type)
+      expect(field.name).to eq('proposal')
+    end
+
+    it 'does not have fields to retrieve single objects whose model fields did not include an ID' do
+      expect(query_type.fields['proposal_notification']).to be_nil
+    end
+
+    it "has connections to retrieve collections of objects" do
+      connection = query_type.fields['proposals']
+      proposal_type = type_creator.created_types[Proposal]
+
+      expect(connection).to be_a(GraphQL::Field)
+      expect(connection.type).to eq(proposal_type.connection_type)
+      expect(connection.name).to eq('proposals')
+    end
+  end
 
   describe "::create_type" do
     it "creates fields for Int attributes" do