String protocol = "perlookup";

        Wagon one = wagonManager.getWagon(protocol);
        Wagon two = wagonManager.getWagon(protocol);

        assertNotSame(one, two);
    }

    private void assertWagon(String protocol) throws Exception {
        Wagon wagon = wagonManager.getWagon(protocol);

        assertNotNull(wagon, "Check wagon, protocol=" + protocol);
    }

  [[2]] Localhost (127.0.0.1) may also be unavailable if the whole
        network stack is offline.

  [[3]] "Remote" repositories referenced using the file:// protocol may
        be available. However, if that file:// url references a
        file-share, as in the case of an NFS or SMB mount, that will
        be unavailable.

        <field>
          <name>url</name>
          <version>4.0.0+</version>
          <required>true</required>
          <description>
            The url of the repository, in the form {@code protocol://hostname/path}.
          </description>
          <type>String</type>
        </field>
        <field>
          <name>layout</name>
          <version>4.0.0+</version>
          <description>

            @see #isActive()
          </description>
          <type>String</type>
        </field>
        <field>
          <name>protocol</name>
          <version>1.0.0+</version>
          <description>
            The proxy protocol.
          </description>
          <type>String</type>
          <defaultValue>http</defaultValue>
        </field>
        <field>