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| Author |
Message |
< Erlang bugs mailing list ~ Eunit test process killed when unloading module with tests |
| Guest |
 Posted: Mon Jun 07, 2010 12:37 pm |
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Guest
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Hi!
We've encountered a rare eunit bug related to test
generators and code loading.
Erlang version: R13B04 (reproduced in R13B03 as well).
OS: Mac OS X 10.5, 10.6, Ubuntu 8.1 (probably all platforms).
How to reproduce (minimal):
* Create two modules: a_mod.erl and b_mod.erl, with the
content as seen below
* In an Erlang shell:
c(a_mod), c(b_mod).
eunit:test([a_mod, b_mod]).
*unexpected termination of test process*
::killed
It seems that after running the a_mod test module,
eunit leaves a process that is executing inside it
(or that is what we believe).
This causes the test process to be killed when
the second test runs code:purge(a_mod).
* This only occurs when the module that is unloaded
has a test generator (first_test_ in this example),
not if it has a 'normal' test function.
Now, you may wonder why anyone would want to do this.
Well, in this minimal example it is not apparent, but
we have white-box unit tests in header files that we
conditionally include in our modules. Sometimes
we mock other modules in the same application, and
then we hit this bug.
a_mod.erl:
-------------------------------------------------
-module(a_mod).
-include_lib("eunit/include/eunit.hrl").
first_test_() ->
{foreach, fun setup/0, fun teardown/1,
[
fun first_/0
]}.
setup() ->
ok.
teardown(_) ->
ok.
first_() ->
ok.
-------------------------------------------------
b_mod.erl:
----------------------
-module(b_mod).
-include_lib("eunit/include/eunit.hrl").
second_test() ->
code:delete(a_mod),
code:purge(a_mod),
ok.
----------------------
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| wailian |
| Posted: Tue Mar 20, 2012 2:16 am |
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| i/p transducer requires a standard input and is for use with linear pneumatic actuators and has high air capacity. It can be easy change of the output signal from. electro pneumatic transducer is used, for example, in the biomedical field for the pneumatic control of a cardiac module, or artificial heart. |
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