simply_savon_test.rb

require "savon"

client = Savon::Client.new "http://example.com"
client.login! { |soap| soap.body = { :username => 'un', :password => 'pw' } }

# Expected debug output:
#
# SOAP request: http://example.com
# SOAPAction: login, Content-Type: text/xml;charset=UTF-8
# <?xml version="1.0" encoding="UTF-8"?>
# <env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
#   <env:Body>
#     <wsdl:login>
#       <username>un</username>
#       <password>pw</password>
#     </wsdl:login>
#   </env:Body>
# </env:Envelope>