Question

I’m write a test with EUnit, but not anything exception detail output in console.

exp_test() ->
  ?assertEqual(0, 1/0).

Run this module:exp_test() in the Erlang Shell output following

** exception error: bad argument in an arithmetic expression
 in function  exp_test:'-exp_test/0-fun-0-'/1 (src/test/eunit/xxx_test.erl, line 8)

But in EUnit output following

> eunit:test(xxx).
> xxx_test: exp_test...*failed*
  ::badarith

EUnit not output anything exception trace info

Im trying the verbose config in eunit, but no effect.

I want to output some exception detail in eunit test result.

Thanks~

Answer 1

Eunit is quite old and while it is officially maintained by the OTP team at Ericsson, it is usually uncared for. Eunit currently has the bad habit of eating up stack traces, and hasn’t been updated for R15’s line numbers in exceptions.

I wouldn’t argue that “that’s how it’s supposed to work”. No sane test tool should hide exception details and line numbers for you.