How to test wash_out controller with Rspec in Rails 5 - ruby-on-rails

Question

I am using wash_out to create a soap webservice, this is my controller:
class SignerController < ApplicationController
soap_service
soap_action 'xmlSign', args: {
xml: :string,
certificate: :string
},
return: {
signed_xml: :string,
error: :string
},
to: :xml_sign
def xml_sign
render soap: {
signed_xml: "TODO"
}
rescue
render soap: {
error: $!.message
}
end
end
following http://blog.johnsonch.com/2013/04/18/rails-3-soap-and-testing-oh-my/ I wrote this test:
require 'rails_helper'
require 'savon'
RSpec.describe SignerController, type: :controller do
HTTPI.adapter = :rack
HTTPI::Adapter::Rack.mount 'app', Signer::Application
it 'signs an xml' do
application_base = "http://app"
client = Savon::Client.new({:wsdl => application_base + signer_wsdl_path })
result = client.call(:xmlSign, xml: 'xml', certificate: 'cert')
result.body[:xml_sign][:value].should_not be_nil
end
end
but rspec always throws this error:
NoMethodError:
undefined method `element_children' for nil:NilClass
# ./spec/controllers/signer_controller_spec.rb:12:in `block (2 levels) in <top (required)>'
I am using rails 5.1.5, wash_out 0.12, httpi 2.4.2 and savon 2.11.2
how can I fix this?

Answer 1

What worked for me was adding "render_views" to the controller spec. For example
RSpec.describe SoapController, type: controller do
render_views # added render_views
HTTPI.adapter = :rack
HTTPI::Adapter::Rack.mount 'application', PhoneDialogue::Application
it 'signs an xml' do
application_base = "http://app"
client = Savon::Client.new({:wsdl => application_base + soap_wsdl_path })
result = client.call(:xmlSign, xml: 'xml', certificate: 'cert')
result.body[:xml_sign][:value].should_not be_nil
end
end