On Sun, Sep 8, 2013 at 12:35 PM, Marek Majkowski <[email protected]> wrote: > Tor ships with some testing facilities (tor/src/test/test), but they > are not comprehensive. (I'm aware there's an ongoing effort on > improving these tests). > > To test anything non trivial it is necessary to run a tor node as a > part of a tor network. There is another tool called chutney [1] that > can be used to set up a small testing Tor network: it generates plenty > of torrc configs and spawns a number of Tor servers locally. > > This is very handy, but it can take a while before the network starts > working - the Auth servers need to establish the consensus and do all > the things I have no clue about. > > Here's a simple shell script [2]: > - It uses chutney to start a testing tor network. > - It waits for it to work by trying to establish a connection to > localhost:22. > - Finally it tears down the network. > > Normally it takes around 5 minutes for the network to converge: > > $ time ./go.sh > real 4m8.330s > user 0m2.064s > sys 0m0.392s > > Of course, you don't have to set a completely fresh Tor network for > every single test, but that's what I often do. I'd be eager to hear > how people are reusing chutney networks. > > In past I wrote this thing called fluxcapacitor [3], it's a tool that > speeds up tests. After a few fixes I was able to run chutney on it: > > $ time /tmp/fluxcapacitor/fluxcapacitor ./go.sh > > real 0m11.450s > user 0m2.340s > sys 0m2.120s > > Running stuff under fluxcapacitor is not deterministic, sometimes it > takes 8 seconds, sometimes 15 but it generally works and should go > pretty quick. > > That's it. I thought someone may find it useful. > > Cheers, > Marek
Thanks, Marek! This looks quite useful. Can you talk a bit more about under what circumstances (if any) the fluxcapacitor code there might give incorrect results? Also, I had thought the quick-and-dirty chutney test we shipped (via ./src/test/test-network.sh) bootstrapped in faster than 5 minutes. Am I wrong there? Does it use any tricks that might be helpful in combination with fluxcapacitor? best wishes, -- Nick _______________________________________________ tor-dev mailing list [email protected] https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
