Handle children errors

spec/epp/domain_spec.rb

@@ -78,6 +78,12 @@ describe 'EPP Domain', epp: true do
         expect(response[:result_code]).to eq('2306')
         expect(response[:msg]).to eq('Domain must have 1-13 nameservers')
       end
+
+      it 'returns error when invalid nameservers are present' do
+        response = epp_request('domains/create_w_invalid_nameservers.xml')
+        expect(response[:result_code]).to eq('2005')
+        expect(response[:msg]).to eq('Hostname is invalid')
+      end
     end
 
     context 'with juridical persion as an owner' do

spec/epp/requests/domains/create_w_invalid_nameservers.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <create>
+      <domain:create
+       xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:name>example.ee</domain:name>
+        <domain:period unit="y">1</domain:period>
+        <domain:ns>
+          <domain:hostObj>invalid1-</domain:hostObj>
+          <domain:hostObj>-invalid2</domain:hostObj>
+        </domain:ns>
+        <domain:registrant>jd1234</domain:registrant>
+        <domain:contact type="admin">sh8013</domain:contact>
+        <domain:contact type="tech">sh8013</domain:contact>
+        <domain:contact type="tech">sh801333</domain:contact>
+        <domain:authInfo>
+          <domain:pw>2fooBAR</domain:pw>
+        </domain:authInfo>
+      </domain:create>
+    </create>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>