[add] added public mode

spec/requests/clients_request_spec.rb

@@ -587,4 +587,49 @@ RSpec.describe 'Clients', type: :request do
       end
     end
   end
+
+  describe 'POST /public/:name' do
+    # FIXME: rather have this automated than adding ENV by hand
+    if ENV['RAILS_API_PUBLIC']
+
+      context 'when request to write public client' do
+        before { post "/public/#{public_client.name}" }
+        it 'returns status code 200' do
+          expect(json_response['name']).to eq public_client.name
+          expect(json_response['ipv4']).to eq '127.0.0.1'
+          expect(response).to have_http_status(200)
+        end
+      end
+
+      context 'when requesting to write public client with body' do
+        before { post "/public/#{public_client.name}", params: { ipv4: '99.55.66.2' } }
+        it 'returns status code 200' do
+          expect(json_response['name']).to eq public_client.name
+          expect(json_response['ipv4']).to eq '99.55.66.2'
+          expect(response).to have_http_status(200)
+        end
+      end
+
+      context 'when requesting to write non existing client' do
+        before { post "/public/#{non_existing_client}" }
+        it 'returns status code 201' do
+          expect(json_response['name']).to eq non_existing_client
+          expect(json_response['ipv4']).to eq '127.0.0.1'
+          expect(response).to have_http_status(201)
+        end
+      end
+      # TODO: 406 and 429, check client count on 200
+    else
+
+      context 'when request to write public client' do
+        before { post "/public/#{public_client.name}" }
+        it 'returns status code 403' do
+          expect(response.body).to be_empty
+          expect(response).to have_http_status(403)
+        end
+      end
+      # TODO: check client count/modification
+
+    end
+  end
 end