Resource resource = Resource.newInstance(1023, 3);
ContainerResourceDecrease ctx = ContainerResourceDecrease.newInstance(
containerId, resource);
// get proto and recover to ctx
ContainerResourceDecreaseProto proto =
((ContainerResourceDecreasePBImpl) ctx).getProto();
ctx = new ContainerResourceDecreasePBImpl(proto);
// check values
Assert.assertEquals(ctx.getCapability(), resource);