Add test

Author: blake

spec/openapi_3/mount_override_api_spec.rb

@@ -0,0 +1,58 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'mount override api' do
+  def app
+    old_api = Class.new(Grape::API) do
+      desc 'old endpoint', success: { code: 200, message: 'old message' }
+      params do
+        optional :param, type: Integer, desc: 'old param'
+      end
+      get do
+        'old'
+      end
+    end
+
+    new_api = Class.new(Grape::API) do
+      desc 'new endpoint', success: { code: 200, message: 'new message' }
+      params do
+        optional :param, type: String, desc: 'new param'
+      end
+      get do
+        'new'
+      end
+    end
+
+    Class.new(Grape::API) do
+      mount new_api
+      mount old_api
+
+      add_swagger_documentation openapi_version: '3.0', format: :json
+    end
+  end
+
+  context 'actual api request' do
+    subject do
+      get '/'
+      last_response.body
+    end
+
+    it 'returns data from new endpoint' do
+      is_expected.to eq 'new'
+    end
+  end
+
+  context 'api documentation' do
+    subject do
+      get '/swagger_doc'
+      JSON.parse(last_response.body)['paths']['/']['get']
+    end
+
+    it 'shows documentation from new endpoint' do
+      expect(subject['parameters'][0]['description']).to eql('new param')
+      expect(subject['parameters'][0]['schema']['type']).to eql('string')
+      expect(subject['responses']['200']['description']).to eql('new message')
+    end
+  end
+end