[erlang-questions] Eunit question...

[Bryan Hughes]

Hi Everyone,

Hoping someone might be able to help me understand how to set up a unit test with EUnit which needs both timeout and fixture setup/cleanup.  I find the documentation a bit challenging on this particular aspec.

For example, according to the documentation for using the fixture pattern:

{setup, Setup, Tests | Instantiator}

{setup, Setup, Cleanup, Tests | Instantiator}

{setup, Where, Setup, Tests | Instantiator}

{setup, Where, Setup, Cleanup, Tests | Instantiator}

So my normal tests look like:

my_test_() ->
    {setup,
     fun setup/0,
     fun cleanup/1,
     ?_test(begin
                ...
            end)}.

For using adjusting the timeout, the documentation describes this pattern:

{timeout, Time::number(), Tests}

I have not been able to figure out how to craft my test.  Unfortunately my variations just fail, or just quietly end without running any of the remaining tests for the module.


Thanks!!!

Cheers,
Bryan

[Gianfranco Alongi]

You put the timeout in the Tests.

-module(demo_tests).
-include_lib("eunit/include/eunit.hrl").
timeout_setup_test_() ->
{setup,
fun() -> ok end,
fun(_) -> ok end,
{timeout,20,
fun() -> ok = demo:a() end}}.

-module(demo_tests).
-include_lib("eunit/include/eunit.hrl").
timeout_setup_test_() ->
{setup,
fun() -> ok end,
fun(_) -> ok end,
{timeout,20,
fun() -> ok = demo:a() end}}.

erlc *.erl
erl
eunit:test(demo).

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[Gianfranco Alongi]

Sorry, seems like I got double paste in there, second paste should
have been demo.erl

-module(demo).
-export([a/0]).
a() ->
timer:sleep(10000),
ok.

[Bryan Hughes]

This is perfect! Thank you. I was trying to get the setup fixture
pattern inside the timeout tuple, which just quietly ended tests.

It's really great to have such a helpful and active community - very
much appreciated!

Regards,
Bryan