Add admin zone specs

#475

spec/requests/admin/dns/zones/update_spec.rb

@@ -0,0 +1,40 @@
+require 'rails_helper'
+
+RSpec.describe 'admin zone update' do
+  before :example do
+    sign_in_to_admin_area
+  end
+
+  text_attributes = %i[origin email master_nameserver]
+  integer_attributes = %i[ttl refresh retry expire minimum_ttl]
+
+  text_attributes.each do |attr_name|
+    it "updates #{attr_name}" do
+      zone = create(:zone, attr_name => 'test')
+
+      patch admin_zone_path(zone), zone: attributes_for(:zone, attr_name => 'new-test')
+      zone.reload
+
+      expect(zone.send(attr_name)).to eq('new-test')
+    end
+  end
+
+  integer_attributes.each do |attr_name|
+    it "updates #{attr_name}" do
+      zone = create(:zone, attr_name => '1')
+
+      patch admin_zone_path(zone), zone: attributes_for(:zone, attr_name => '2')
+      zone.reload
+
+      expect(zone.send(attr_name)).to eq(2)
+    end
+  end
+
+  it 'redirects to :index' do
+    zone = create(:zone)
+
+    patch admin_zone_path(zone), { zone: attributes_for(:zone) }
+
+    expect(response).to redirect_to admin_zones_url
+  end
+end