}
@Test
public void testArgumentValueConverter() throws Exception {
final ModelNode node = new HeadersArgumentValueConverter(new MockCommandContext()).fromString("{ rollout " +
"groupA(rolling-to-servers=true,max-failure-percentage=20) ^ groupB, groupC," +
"groupD(rolling-to-servers=true,max-failed-servers=1) ^ groupE rollback-across-groups}");
final ModelNode expectedHeaders = new ModelNode();
final ModelNode rolloutPlan = expectedHeaders.get(Util.ROLLOUT_PLAN);