Add test

Author: blake

spec/openapi_3/deprecated_field_spec.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'deprecated endpoint' do
+  def app
+    Class.new(Grape::API) do
+      desc 'Deprecated endpoint', deprecated: true
+      get '/foobar' do
+        { foo: 'bar' }
+      end
+
+      add_swagger_documentation openapi_version: '3.0'
+    end
+  end
+
+  subject do
+    get '/swagger_doc.json'
+    JSON.parse(last_response.body)
+  end
+
+  it 'includes the deprecated field' do
+    expect(subject['paths']['/foobar']['get']['deprecated']).to eql(true)
+  end
+end