//test a subcription with a physical and logical partition
DatabusSubscription sub4 =
new DatabusSubscription(PhysicalSource.MASTER_PHISYCAL_SOURCE,
new PhysicalPartition(101, "multBufferTest2"),
new LogicalSourceId(new LogicalSource(2, "srcName2"), (short)2)
);
DbusFilter filter4 = t._eventBuffer.constructFilters(Arrays.asList(sub4));
assertNotNull(filter4);
assertTrue(filter4 instanceof PhysicalPartitionDbusFilter);