Examples of org.apache.helix.HelixAdmin.removeConstraint()

        tool.getConstraints(clusterName, ConstraintType.MESSAGE_CONSTRAINT);
    Assert.assertNull(constraints, "message-constraint should NOT exist for cluster: " + className);


    // remove non-exist constraint
    try {
      tool.removeConstraint(clusterName, ConstraintType.MESSAGE_CONSTRAINT, "constraint1");
      // will leave a null message-constraint znode on zk
    } catch (Exception e) {
      Assert.fail("Should not throw exception when remove a non-exist constraint.");
    }

    Assert.assertNotNull(item, "message-constraint for constraint1 should exist");
    Assert.assertEquals(item.getConstraintValue(), "1");
    Assert.assertEquals(item.getAttributeValue(ConstraintAttribute.RESOURCE), "MyDB");


    // remove a exist message-constraint
    tool.removeConstraint(clusterName, ConstraintType.MESSAGE_CONSTRAINT, "constraint1");
    constraints =
        accessor.getProperty(keyBuilder.constraint(ConstraintType.MESSAGE_CONSTRAINT.toString()));
    Assert.assertNotNull(constraints, "message-constraint should exist");
    item = constraints.getConstraintItem(ConstraintId.from("constraint1"));
    Assert.assertNull(item, "message-constraint for constraint1 should NOT exist");

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