Update tests

#660

test/integration/epp/domain/update/transfer_code_test.rb

@@ -0,0 +1,31 @@
+require 'test_helper'
+
+class EppDomainUpdateTest < ActionDispatch::IntegrationTest
+  def setup
+    login_as users(:api_bestnames)
+  end
+
+  def test_overwrites_existing
+    request_xml = <<-XML
+      <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+      <epp xmlns="https://epp.tld.ee/schema/epp-ee-1.0.xsd">
+        <command>
+          <update>
+            <domain:update xmlns:domain="https://epp.tld.ee/schema/domain-eis-1.0.xsd">
+              <domain:name>shop.test</domain:name>
+                <domain:chg>
+                  <domain:authInfo>
+                    <domain:pw>f0ff7d17b0</domain:pw>
+                  </domain:authInfo>
+                </domain:chg>
+            </domain:update>
+          </update>
+        </command>
+      </epp>
+    XML
+
+    session_id = epp_sessions(:api_bestnames).session_id
+    post '/epp/command/update', { frame: request_xml }, { 'HTTP_COOKIE' => "session=#{session_id}" }
+    assert_equal 'f0ff7d17b0', domains(:shop).transfer_code
+  end
+end