Make sure files from erl_opts->src_dirs are copied to .eunit for cover
inspection.
Without this patch cover failed to find source files which were in
src_dirs, and threw the following exception:
ERROR: eunit failed while processing
/path/to/project:
{'EXIT',{{badmatch,{error,no_source_code_found}},
[{rebar_eunit,'-cover_analyze/3-fun-0-',1,
[{file,"src/rebar_eunit.erl"},{line,280}]},
{lists,foreach,2,[{file,"lists.erl"},{line,1262}]},
{rebar_eunit,cover_analyze,3,
[{file,"src/rebar_eunit.erl"},{line,279}]},
{rebar_eunit,eunit,2,[{file,"src/rebar_eunit.erl"},{line,140}]},
{rebar_core,run_modules,4,[{file,"src/rebar_core.erl"},{line,425}]},
{rebar_core,execute,5,[{file,"src/rebar_core.erl"},{line,359}]},
{rebar_core,process_dir0,6,[{file,"src/rebar_core.erl"},{line,223}]},
{rebar_core,process_dir,4,
[{file,"src/rebar_core.erl"},{line,130}]}]}}
Now all source files are copied to .eunit.
Before copying the .erl files to the .eunit directory ensure that they
are deleted if they already exist. This prevents EACCES errors to happen
when trying to re-copy .erl files that are read-only.
Avoid error reports like this one:
prompt$ rebar eunit
==> dummy (eunit)
Test passed.
=ERROR REPORT==== 29-Dec-2011::23:22:11 ===
** Generic server inet_gethost_native_sup terminating
** Last message in was {'EXIT',<0.62.0>,killed}
** When Server state == {state,inet_gethost_native,undefined,<0.62.0>,
{local,inet_gethost_native_sup}}
** Reason for termination ==
** killed
Previously, it could happen if an eunit test did something that
required a name lookup, like in this example:
-module(dummy_tests).
-include_lib("eunit/include/eunit.hrl").
x_test() ->
{ok, _Hostent} = inet:gethostbyname(localhost).
The inet_gethost_native is a process, started on demand, under a
supervisor_bridge under the kernel_sup, but it is not a gen_server
process or the like, so it has nothing in '$ancestors' in its process
dictionary to indicate it is part of kernel.
This means that applications get a chance to shut down themselves,
before rebar will start killing their processes. This avoids ERROR
REPORTS from application supervisors.
Added new property to `eunit_opts` option list:
reset_after_eunit::boolean() - default = true.
If true, try to "reset" VM state to approximate state prior to
running the EUnit tests:
* Stop net_kernel if it was started
* Stop OTP applications not running before EUnit tests were run
* Kill processes not running before EUnit tests were run
* Reset OTP application environment variables
Previous patch erroneously assumed that cover:start() returned
{already_started,Pid} in the cases where cover was already started. We
now turn {error,{already_started,Pid}} into {ok, Pid} and return
{error, Reason} if we encounter an error we do not know about, this
will cause a nice and violent badmatch to stop everything.
The cover module calls io:format and io:fwrite directly for several types of
informational messages and warnings. When using meck to mock covered modules
these warnings are triggered and can cause severe polution of the test output.
We can avoid this by starting cover explicitly then setting the group_leader
of that process to a file handle.
