[erlang-questions] How to start application before all eunit cases

[Nathan Fiedler]

I don't have an explanation for the application sometimes failing to find
the config file, but I can say that when I tried to use EUnit for anything
slightly more complicated than the simplest of tests, it turned into a
frustrating experience. Instead, I changed my tests to Common Test, which
may be a bit like killing a fly with a baseball bat, but it sure does the
job. And you can ramp up slowly with CT; I'm just using the _data directory
to hold data files and the init_per_suite/end_per_suite hooks to set up and
tear down. The best part is I didn't have to change the tests themselves,
other than to receive a Config argument.

Short answer: use Common Test.

n


On Sun, Nov 23, 2014 at 11:06 PM, linbo liao <llbgurs@REDACTED> wrote:

> My Erlang project managed by rebar, it divides to different module.
>
> -pro
>   |-- rel
>   |-- src
>      |--- module1
>      |--- module2
>   |-- test
>      |--- module1_tests.erl
>      |--- module2_tests.erl
>
> and for each module*_tests.erl, Use Eunit Fixtures
> <http://www.erlang.org/doc/apps/eunit/chapter.html#Fixtures> to setup
> environment. For example,
>
> module1_test_() ->
>     {setup,
>         fun setup/0,
>         fun clean_up/1,
>         fun (SetupData) ->
>             [
>                 test_function(SetupData)
>             ]
>     end}.
>
> setup() ->
>     pro:start(),
>     ok.
>
> clean_up(_) ->
>     pro:stop().
>
> And Makefile is:
>
> test:
>     ERL_AFLAGS="-config rel/pro/etc/app.config"  $(REBAR)  compile eunit skip_deps=true
>
> Here I encounter a problem, since I have many test module in test/, each
> test module will start and stop application for whole executing flow.
> Sometimes start application will be failed, told not find app.config
> configure file, not sure why.
>
> So I think is there a way to start application before all test module?
>
> Thanks,
>
> Linbo
>
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