[Ns-developers] Trace based regression tests

[Pavel Boyko]

  Hi, 

  I'm trying to write simple pcap based regression (aka system) test using new 
framework. The only adequate example I have found is ns3tcp-interop-test-
suite.cc . It can operate in two modes -- write packet traces ("test vectors") 
or compare actual transmitted packets (sniffed at IP level) with given correct 
traces. I like this. But this behavior is implemented "by hand", both packet 
tracing and comparison are implemented in Ns3TcpInteroperabilityTestCase and 
can not be reused by other tests. Also it happens that fancy PcapFile doesn't 
know about old PcapWriter, used by my favorite *Helper::EnablePcapAll (). And 
I want to use device level sniffer instead of IP level one.

  Does anybody have any plans / ideas how to implement trace based regression 
test behavior in reusable way? I can easily implement custom pcap diff for my 
WiFi based tests, but problem looks general and deserves some general 
solution.

  Pavel