Fix a problem when http.body is empty

CHANGELOG.md

@@ -1,3 +1,6 @@
+# 2.11.2 (2017-03-13)
+* Fix: [#800](https://github.com/savonrb/savon/pull/800) Fix a problem when http.body is empty
+
 # 2.11.1 (2015-05-27)
 
 * Replace dependency on [uuid](https://rubygems.org/gems/uuid), using SecureRandom.uuid instead.

lib/savon/soap_fault.rb

@@ -27,7 +27,7 @@ def to_s
 
     def to_hash
       parsed = nori.parse(xml || http.body)
-      nori.find(parsed, 'Envelope', 'Body')
+      nori.find(parsed, 'Envelope', 'Body') || {}
     end
 
     private

spec/savon/soap_fault_spec.rb

@@ -7,6 +7,7 @@
   let(:soap_fault_nc) { Savon::SOAPFault.new new_response(:body => Fixture.response(:soap_fault)), nori_no_convert }
   let(:soap_fault_nc2) { Savon::SOAPFault.new new_response(:body => Fixture.response(:soap_fault12)), nori_no_convert }
   let(:another_soap_fault) { Savon::SOAPFault.new new_response(:body => Fixture.response(:another_soap_fault)), nori }
+  let(:soap_fault_no_body) { Savon::SOAPFault.new new_response(:body => {}), nori }
   let(:no_fault) { Savon::SOAPFault.new new_response, nori }
 
   let(:nori) { Nori.new(:strip_namespaces => true, :convert_tags_to => lambda { |tag| tag.snakecase.to_sym }) }
@@ -119,6 +120,10 @@
 
       expect(soap_fault_nc2.to_hash).to eq(expected)
     end
+
+    it "returns empty hash" do
+      expect(soap_fault_no_body.to_hash).to eq({})
+    end
   end
 
   def new_response(options = {})