resteasy-jaxrs-2.1.0.GA/examples/oreilly-workbook/ex04_1 example is not working

The PatchTest.java class is not working, running mvn clean install or mvn install provides this result:

Running com.restfully.shop.test.PatchTest

• • • Create a new Customer ***
      15.01.2011 16:23:46 org.jboss.resteasy.spi.ResteasyDeployment
      INFO: Deploying javax.ws.rs.core.Application: class com.restfully.shop.services.ShoppingApplication
      15.01.2011 16:23:46 org.jboss.resteasy.spi.ResteasyDeployment
      INFO: Adding singleton resource com.restfully.shop.services.CustomerResource from Application javax.ws.rs.core.Application
      Created customer 1
      Location: Location: http://localhost:9095/customers/1
      15.01.2011 16:23:46 org.apache.http.impl.conn.SingleClientConnManager revokeConnection
      WARNING: Invalid use of SingleClientConnManager: connection still allocated.
      Make sure to release the connection before allocating another one.
      • After Update ***
        Content-Type: Content-Type: application/xml
        <customer id="1">
        <first-name>William</first-name>
        <last-name>null</last-name>
        <street>null</street>
        <city>Boston</city>
        <state>null</state>
        <zip>null</zip>
        <country>null</country>
        </customer>
        Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.511 sec

After update above should not be showing "null" for those fields, but there actual values.
Also, the WARNING above may be indicating another problem with this test case.