# test a simple schema that uses attribute refs

--- |
  <?xml version="1.0" encoding="UTF-8"?>
  <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
     <xs:simpleType name="color">
       <xs:restriction base="xs:string">
         <xs:enumeration value="red" />
         <xs:enumeration value="white" />
         <xs:enumeration value="blue" />
       </xs:restriction>
     </xs:simpleType>
     <xs:attribute name="color" type="color" />
     <xs:element name="foo">
      <xs:complexType>
       <xs:simpleContent>
          <xs:extension base="xs:string">
             <xs:attribute ref="color" use="required"/>
          </xs:extension>
       </xs:simpleContent>
     </xs:complexType>
   </xs:element>
  </xs:schema>

--- |
 <foo color="red">bar</foo>
--- >
PASS

--- |
 <foo color="yellow">bar</foo>
--- >
FAIL /[iI]llegal value/

--- |
 <foo>bar</foo>
--- >
FAIL /[mM]issing required/