Basic contact check command implementation

spec/epp/contact_spec.rb

@@ -45,6 +45,16 @@ describe 'EPP Contact', epp: true do
       expect(response[:msg]).to eq('Object does not exist')
     end
 
+    it 'checks contacts' do
+      Fabricate(:contact)
+      Fabricate(:contact, id:'sh8914')
+      
+      response = epp_request('contacts/check.xml')
+      expect(response[:result_code]).to eq('1000')
+      expect(response[:msg]).to eq('Command completed successfully')
+
+    end
+
   end
 
 end

spec/epp/requests/contacts/check.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+  <epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+    <command>
+      <check>
+        <contact:check
+         xmlns:contact="urn:ietf:params:xml:ns:contact-1.0">
+          <contact:id>sh8913</contact:id>
+          <contact:id>sh8914</contact:id>
+        </contact:check>
+      </check>
+      <clTRID>ABC-12345</clTRID>
+    </command>
+  </epp>