I would strongly recommend against doing tests against a live exchange, because there are just too many failure modes (network down, exchange down, exchange hostname changed, etc.) as well as the possibility to execute trades and lose money.
What I usually do is this: * create stub requests/responses produced by the system you're integrating with - either in separate textfiles or generated with simple-check (now test.check) * use the defined requests/responses when testing the code which integrates with the system * create a mock system for use in repl environment (uses same requests/responses as the tests) This requires some effort to set up, but really pays of with getting rid of a live dependency. If you're worried about API changes, you can still have a very minimal live testcase which compares exchange's responses with your stubs, although it shouldn't test for any logic, only structure. On Wednesday, 26 March 2014 09:18:40 UTC+2, JPH wrote: > > Hi all. I'm still relatively new to Clojure and I haven't spent much > time on testing before. I've recently written some libraries to talk to > Bitcoin exchanges (clj-havelock, clj-btce, cryptick), and I'd like to > add tests to them. > > I'd like some advice around how to test against a live service (there is > not test service available) where there's a financial impact if > something goes wrong (someone buys/sells by accident). > > My manual REPL-testing usually involve creating several orders with > price spreads that are unlikely to execute. For instance, selling 1 > Litecoin for 1 Bitcoin. Buying 1 Bitcoin for $5 USD. > > My concern is if someone runs the tests with bad inputs, resulting in > real orders being executed. > > I can write tests that pull in API credentials from a file in my home > directory, and define price ranges for orders outside the normal spread. > These could then be fed into the tests. However, would it be better to > try and mock the trading API responses rather than do it live? Or > perhaps require a flag to run dangerous tests? > > Ultimately I want to be able to demonstrate the libraries are mature > with good test coverage, but I'm worried about the right approach. Any > advice would be appreciated. > > Thanks in advance, > JPH > > > > > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
