%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*- %% ex: ts=4 sw=4 et %% ------------------------------------------------------------------- %% %% rebar: Erlang Build Tools %% %% Copyright (c) 2009, 2010 Dave Smith (dizzyd@dizzyd.com) %% %% Permission is hereby granted, free of charge, to any person obtaining a copy %% of this software and associated documentation files (the "Software"), to deal %% in the Software without restriction, including without limitation the rights %% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell %% copies of the Software, and to permit persons to whom the Software is %% furnished to do so, subject to the following conditions: %% %% The above copyright notice and this permission notice shall be included in %% all copies or substantial portions of the Software. %% %% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR %% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, %% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE %% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER %% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, %% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN %% THE SOFTWARE. %% ------------------------------------------------------------------- %% @author Dave Smith %% @doc rebar_eunit supports the following commands: %% %% The following Global options are supported: %% %% Additionally, for projects that have separate folders for the core %% implementation, and for the unit tests, then the following %% rebar.config option can be provided: %% {eunit_compile_opts, [{src_dirs, ["src", "dir"]}]}.. %% @copyright 2009, 2010 Dave Smith %% ------------------------------------------------------------------- -module(rebar_eunit). -export([eunit/2, clean/2]). %% for internal use only -export([info/2]). -include("rebar.hrl"). -define(EUNIT_DIR, ".eunit"). %% =================================================================== %% Public API %% =================================================================== eunit(Config, _AppFile) -> ok = ensure_dirs(), %% Save code path CodePath = setup_code_path(), CompileOnly = rebar_utils:get_experimental_global(Config, compile_only, false), {ok, SrcErls} = rebar_erlc_compiler:test_compile(Config, "eunit", ?EUNIT_DIR), case CompileOnly of "true" -> true = code:set_path(CodePath), ?CONSOLE("Compiled modules for eunit~n", []); false -> run_eunit(Config, CodePath, SrcErls) end. clean(_Config, _File) -> rebar_file_utils:rm_rf(?EUNIT_DIR). %% =================================================================== %% Internal functions %% =================================================================== info(help, eunit) -> info_help("Run eunit tests"); info(help, clean) -> Description = ?FMT("Delete eunit test dir (~s)", [?EUNIT_DIR]), info_help(Description). info_help(Description) -> ?CONSOLE( "~s.~n" "~n" "Valid rebar.config options:~n" " ~p~n" " ~p~n" " ~p~n" " ~p~n" " ~p~n" " ~p~n" "Valid command line options:~n" " suites=\"foo,bar\" (Run tests in foo.erl, test/foo_tests.erl and~n" " tests in bar.erl, test/bar_tests.erl)~n" " tests=\"baz\" (For every existing suite, run the first test whose~n" " name starts with bar and, if no such test exists,~n" " run the test whose name starts with bar in the~n" " suite's _tests module)~n", [ Description, {eunit_opts, []}, {eunit_compile_opts, []}, {eunit_first_files, []}, {cover_enabled, false}, {cover_print_enabled, false}, {cover_export_enabled, false} ]). run_eunit(Config, CodePath, SrcErls) -> %% Build a list of all the .beams in ?EUNIT_DIR -- use this for %% cover and eunit testing. Normally you can just tell cover %% and/or eunit to scan the directory for you, but eunit does a %% code:purge in conjunction with that scan and causes any cover %% compilation info to be lost. AllBeamFiles = rebar_utils:beams(?EUNIT_DIR), {BeamFiles, TestBeamFiles} = lists:partition(fun(N) -> string:str(N, "_tests.beam") =:= 0 end, AllBeamFiles), OtherBeamFiles = TestBeamFiles -- [filename:rootname(N) ++ "_tests.beam" || N <- AllBeamFiles], ModuleBeamFiles = BeamFiles ++ OtherBeamFiles, %% Get modules to be run in eunit AllModules = [rebar_utils:beam_to_mod(?EUNIT_DIR, N) || N <- AllBeamFiles], {SuitesProvided, FilteredModules} = filter_suites(Config, AllModules), %% Get matching tests Tests = get_tests(Config, SuitesProvided, ModuleBeamFiles, FilteredModules), SrcModules = [rebar_utils:erl_to_mod(M) || M <- SrcErls], {ok, CoverLog} = cover_init(Config, ModuleBeamFiles), StatusBefore = status_before_eunit(), EunitResult = perform_eunit(Config, Tests), perform_cover(Config, FilteredModules, SrcModules), cover_close(CoverLog), case proplists:get_value(reset_after_eunit, get_eunit_opts(Config), true) of true -> reset_after_eunit(StatusBefore); false -> ok end, %% Stop cover to clean the cover_server state. This is important if we want %% eunit+cover to not slow down when analyzing many Erlang modules. ok = cover:stop(), case EunitResult of ok -> ok; _ -> ?ABORT("One or more eunit tests failed.~n", []) end, %% Restore code path true = code:set_path(CodePath), ok. ensure_dirs() -> %% Make sure ?EUNIT_DIR/ and ebin/ directory exists (append dummy module) ok = filelib:ensure_dir(filename:join(eunit_dir(), "dummy")), ok = filelib:ensure_dir(filename:join(rebar_utils:ebin_dir(), "dummy")). eunit_dir() -> filename:join(rebar_utils:get_cwd(), ?EUNIT_DIR). setup_code_path() -> %% Setup code path prior to compilation so that parse_transforms %% and the like work properly. Also, be sure to add ebin_dir() %% to the END of the code path so that we don't have to jump %% through hoops to access the .app file CodePath = code:get_path(), true = code:add_patha(eunit_dir()), true = code:add_pathz(rebar_utils:ebin_dir()), CodePath. %% %% == filter suites == %% filter_suites(Config, Modules) -> RawSuites = rebar_config:get_global(Config, suites, ""), SuitesProvided = RawSuites =/= "", Suites = [list_to_atom(Suite) || Suite <- string:tokens(RawSuites, ",")], {SuitesProvided, filter_suites1(Modules, Suites)}. filter_suites1(Modules, []) -> Modules; filter_suites1(Modules, Suites) -> [M || M <- Suites, lists:member(M, Modules)]. %% %% == get matching tests == %% get_tests(Config, SuitesProvided, ModuleBeamFiles, FilteredModules) -> Modules = case SuitesProvided of false -> %% No specific suites have been provided, use %% ModuleBeamFiles which filters out "*_tests" modules %% so eunit won't doubly run them and cover only %% calculates coverage on production code. However, %% keep "*_tests" modules that are not automatically %% included by eunit. %% %% From 'Primitives' in the EUnit User's Guide %% http://www.erlang.org/doc/apps/eunit/chapter.html %% "In addition, EUnit will also look for another %% module whose name is ModuleName plus the suffix %% _tests, and if it exists, all the tests from that %% module will also be added. (If ModuleName already %% contains the suffix _tests, this is not done.) E.g., %% the specification {module, mymodule} will run all %% tests in the modules mymodule and mymodule_tests. %% Typically, the _tests module should only contain %% test cases that use the public interface of the main %% module (and no other code)." [rebar_utils:beam_to_mod(?EUNIT_DIR, N) || N <- ModuleBeamFiles]; true -> %% Specific suites have been provided, return the %% filtered modules FilteredModules end, get_matching_tests(Config, Modules). get_matching_tests(Config, Modules) -> RawFunctions = rebar_utils:get_experimental_global(Config, tests, ""), Tests = [list_to_atom(F1) || F1 <- string:tokens(RawFunctions, ",")], case Tests of [] -> Modules; Functions -> case get_matching_tests1(Modules, Functions, []) of [] -> []; RawTests -> make_test_primitives(RawTests) end end. get_matching_tests1([], _Functions, TestFunctions) -> TestFunctions; get_matching_tests1([Module|TModules], Functions, TestFunctions) -> %% Get module exports ModuleStr = atom_to_list(Module), ModuleExports = get_beam_test_exports(ModuleStr), %% Get module _tests exports TestModuleStr = string:concat(ModuleStr, "_tests"), TestModuleExports = get_beam_test_exports(TestModuleStr), %% Build tests {M, F} list Tests = get_matching_tests2(Functions, {Module, ModuleExports}, {list_to_atom(TestModuleStr), TestModuleExports}), get_matching_tests1(TModules, Functions, lists:merge([TestFunctions, Tests])). get_matching_tests2(Functions, {Mod, ModExports}, {TestMod, TestModExports}) -> %% Look for matching functions into ModExports ModExportsStr = [atom_to_list(E1) || E1 <- ModExports], TestModExportsStr = [atom_to_list(E2) || E2 <- TestModExports], get_matching_exports(Functions, {Mod, ModExportsStr}, {TestMod, TestModExportsStr}, []). get_matching_exports([], _, _, Matched) -> Matched; get_matching_exports([Function|TFunctions], {Mod, ModExportsStr}, {TestMod, TestModExportsStr}, Matched) -> FunctionStr = atom_to_list(Function), %% Get matching Function in module, otherwise look in _tests module NewMatch = case get_matching_export(FunctionStr, ModExportsStr) of [] -> {TestMod, get_matching_export(FunctionStr, TestModExportsStr)}; MatchingExport -> {Mod, MatchingExport} end, case NewMatch of {_, []} -> get_matching_exports(TFunctions, {Mod, ModExportsStr}, {TestMod, TestModExportsStr}, Matched); _ -> get_matching_exports(TFunctions, {Mod, ModExportsStr}, {TestMod, TestModExportsStr}, [NewMatch|Matched]) end. get_matching_export(_FunctionStr, []) -> []; get_matching_export(FunctionStr, [ExportStr|TExportsStr]) -> case string:str(ExportStr, FunctionStr) of 1 -> list_to_atom(ExportStr); _ -> get_matching_export(FunctionStr, TExportsStr) end. get_beam_test_exports(ModuleStr) -> FilePath = filename:join(eunit_dir(), string:concat(ModuleStr, ".beam")), case filelib:is_regular(FilePath) of true -> {beam_file, _, Exports0, _, _, _} = beam_disasm:file(FilePath), Exports1 = [FunName || {FunName, FunArity, _} <- Exports0, FunArity =:= 0], F = fun(FName) -> FNameStr = atom_to_list(FName), re:run(FNameStr, "_test(_)?") =/= nomatch end, lists:filter(F, Exports1); _ -> [] end. make_test_primitives(RawTests) -> %% Use {test,M,F} and {generator,M,F} if at least R15B02. Otherwise, %% use eunit_test:function_wrapper/2 fallback. %% eunit_test:function_wrapper/2 was renamed to eunit_test:mf_wrapper/2 %% in R15B02; use that as >= R15B02 check. %% TODO: remove fallback and use only {test,M,F} and {generator,M,F} %% primitives once at least R15B02 is required. {module, eunit_test} = code:ensure_loaded(eunit_test), MakePrimitive = case erlang:function_exported(eunit_test, mf_wrapper, 2) of true -> fun eunit_primitive/3; false -> fun pre15b02_eunit_primitive/3 end, ?CONSOLE(" Running test function(s):~n", []), F = fun({M, F2}, Acc) -> ?CONSOLE(" ~p:~p/0~n", [M, F2]), FNameStr = atom_to_list(F2), NewFunction = case re:run(FNameStr, "_test_") of nomatch -> %% Normal test MakePrimitive(test, M, F2); _ -> %% Generator MakePrimitive(generator, M, F2) end, [NewFunction|Acc] end, lists:foldl(F, [], RawTests). eunit_primitive(Type, M, F) -> {Type, M, F}. pre15b02_eunit_primitive(test, M, F) -> eunit_test:function_wrapper(M, F); pre15b02_eunit_primitive(generator, M, F) -> {generator, eunit_test:function_wrapper(M, F)}. %% %% == run tests == %% perform_eunit(Config, Tests) -> EunitOpts = get_eunit_opts(Config), %% Move down into ?EUNIT_DIR while we run tests so any generated files %% are created there (versus in the source dir) Cwd = rebar_utils:get_cwd(), ok = file:set_cwd(?EUNIT_DIR), EunitResult = (catch eunit:test(Tests, EunitOpts)), %% Return to original working dir ok = file:set_cwd(Cwd), EunitResult. get_eunit_opts(Config) -> %% Enable verbose in eunit if so requested.. BaseOpts = case rebar_config:is_verbose(Config) of true -> [verbose]; false -> [] end, BaseOpts ++ rebar_config:get_list(Config, eunit_opts, []). %% %% == code coverage == %% perform_cover(Config, BeamFiles, SrcModules) -> perform_cover(rebar_config:get(Config, cover_enabled, false), Config, BeamFiles, SrcModules). perform_cover(false, _Config, _BeamFiles, _SrcModules) -> ok; perform_cover(true, Config, BeamFiles, SrcModules) -> cover_analyze(Config, BeamFiles, SrcModules). cover_analyze(_Config, [], _SrcModules) -> ok; cover_analyze(Config, FilteredModules, SrcModules) -> %% Generate coverage info for all the cover-compiled modules Coverage = lists:flatten([cover_analyze_mod(M) || M <- FilteredModules, cover:is_compiled(M) =/= false]), %% Write index of coverage info cover_write_index(lists:sort(Coverage), SrcModules), %% Write coverage details for each file lists:foreach(fun({M, _, _}) -> {ok, _} = cover:analyze_to_file(M, cover_file(M), [html]) end, Coverage), Index = filename:join([rebar_utils:get_cwd(), ?EUNIT_DIR, "index.html"]), ?CONSOLE("Cover analysis: ~s\n", [Index]), %% Export coverage data, if configured case rebar_config:get(Config, cover_export_enabled, false) of true -> cover_export_coverdata(); false -> ok end, %% Print coverage report, if configured case rebar_config:get(Config, cover_print_enabled, false) of true -> cover_print_coverage(lists:sort(Coverage)); false -> ok end. cover_close(not_enabled) -> ok; cover_close(F) -> ok = file:close(F). cover_init(false, _BeamFiles) -> {ok, not_enabled}; cover_init(true, BeamFiles) -> %% Attempt to start the cover server, then set its group leader to %% .eunit/cover.log, so all cover log messages will go there instead of %% to stdout. If the cover server is already started, we'll kill that %% server and start a new one in order not to inherit a polluted %% cover_server state. {ok, CoverPid} = case whereis(cover_server) of undefined -> cover:start(); _ -> cover:stop(), cover:start() end, {ok, F} = OkOpen = file:open( filename:join([?EUNIT_DIR, "cover.log"]), [write]), group_leader(F, CoverPid), ?INFO("Cover compiling ~s\n", [rebar_utils:get_cwd()]), Compiled = [{Beam, cover:compile_beam(Beam)} || Beam <- BeamFiles], case [Module || {_, {ok, Module}} <- Compiled] of [] -> %% No modules compiled successfully...fail ?ERROR("Cover failed to compile any modules; aborting.~n", []), ?FAIL; _ -> %% At least one module compiled successfully %% It's not an error for cover compilation to fail partially, %% but we do want to warn about them PrintWarning = fun(Beam, Desc) -> ?CONSOLE("Cover compilation warning for ~p: ~p", [Beam, Desc]) end, _ = [PrintWarning(Beam, Desc) || {Beam, {error, Desc}} <- Compiled], OkOpen end; cover_init(Config, BeamFiles) -> cover_init(rebar_config:get(Config, cover_enabled, false), BeamFiles). cover_analyze_mod(Module) -> case cover:analyze(Module, coverage, module) of {ok, {Module, {Covered, NotCovered}}} -> %% Modules that include the eunit header get an implicit %% test/0 fun, which cover considers a runnable line, but %% eunit:test(TestRepresentation) never calls. Decrement %% NotCovered in this case. [align_notcovered_count(Module, Covered, NotCovered, is_eunitized(Module))]; {error, Reason} -> ?ERROR("Cover analyze failed for ~p: ~p ~p\n", [Module, Reason, code:which(Module)]), [] end. is_eunitized(Mod) -> has_eunit_test_fun(Mod) andalso has_header(Mod, "include/eunit.hrl"). has_eunit_test_fun(Mod) -> [F || {exports, Funs} <- Mod:module_info(), {F, 0} <- Funs, F =:= test] =/= []. has_header(Mod, Header) -> Mod1 = case code:which(Mod) of cover_compiled -> {file, File} = cover:is_compiled(Mod), File; non_existing -> Mod; preloaded -> Mod; L -> L end, {ok, {_, [{abstract_code, {_, AC}}]}} = beam_lib:chunks(Mod1, [abstract_code]), [F || {attribute, 1, file, {F, 1}} <- AC, string:str(F, Header) =/= 0] =/= []. align_notcovered_count(Module, Covered, NotCovered, false) -> {Module, Covered, NotCovered}; align_notcovered_count(Module, Covered, NotCovered, true) -> {Module, Covered, NotCovered - 1}. cover_write_index(Coverage, SrcModules) -> {ok, F} = file:open(filename:join([?EUNIT_DIR, "index.html"]), [write]), ok = file:write(F, "\n" "" "Coverage Summary\n" "\n"), IsSrcCoverage = fun({Mod,_C,_N}) -> lists:member(Mod, SrcModules) end, {SrcCoverage, TestCoverage} = lists:partition(IsSrcCoverage, Coverage), cover_write_index_section(F, "Source", SrcCoverage), cover_write_index_section(F, "Test", TestCoverage), ok = file:write(F, ""), ok = file:close(F). cover_write_index_section(_F, _SectionName, []) -> ok; cover_write_index_section(F, SectionName, Coverage) -> %% Calculate total coverage {Covered, NotCovered} = lists:foldl(fun({_Mod, C, N}, {CAcc, NAcc}) -> {CAcc + C, NAcc + N} end, {0, 0}, Coverage), TotalCoverage = percentage(Covered, NotCovered), %% Write the report ok = file:write(F, ?FMT("

~s Summary

\n", [SectionName])), ok = file:write(F, ?FMT("

Total: ~s

\n", [TotalCoverage])), ok = file:write(F, "\n"), FmtLink = fun(Module, Cov, NotCov) -> ?FMT("\n", [Module, Module, percentage(Cov, NotCov)]) end, lists:foreach(fun({Module, Cov, NotCov}) -> ok = file:write(F, FmtLink(Module, Cov, NotCov)) end, Coverage), ok = file:write(F, "
ModuleCoverage %
~s~s
\n"). cover_print_coverage(Coverage) -> {Covered, NotCovered} = lists:foldl(fun({_Mod, C, N}, {CAcc, NAcc}) -> {CAcc + C, NAcc + N} end, {0, 0}, Coverage), TotalCoverage = percentage(Covered, NotCovered), %% Determine the longest module name for right-padding Width = lists:foldl(fun({Mod, _, _}, Acc) -> case length(atom_to_list(Mod)) of N when N > Acc -> N; _ -> Acc end end, 0, Coverage) * -1, %% Print the output the console ?CONSOLE("~nCode Coverage:~n", []), lists:foreach(fun({Mod, C, N}) -> ?CONSOLE("~*s : ~3s~n", [Width, Mod, percentage(C, N)]) end, Coverage), ?CONSOLE("~n~*s : ~s~n", [Width, "Total", TotalCoverage]). cover_file(Module) -> filename:join([?EUNIT_DIR, atom_to_list(Module) ++ ".COVER.html"]). cover_export_coverdata() -> ExportFile = filename:join(eunit_dir(), "eunit.coverdata"), case cover:export(ExportFile) of ok -> ?CONSOLE("Coverdata export: ~s~n", [ExportFile]); {error, Reason} -> ?ERROR("Coverdata export failed: ~p~n", [Reason]) end. percentage(0, 0) -> "not executed"; percentage(Cov, NotCov) -> integer_to_list(trunc((Cov / (Cov + NotCov)) * 100)) ++ "%". %% %% == reset_after_eunit == %% status_before_eunit() -> Apps = get_app_names(), AppEnvs = [{App, application:get_all_env(App)} || App <- Apps], {erlang:processes(), erlang:is_alive(), AppEnvs, ets:tab2list(ac_tab)}. get_app_names() -> [AppName || {AppName, _, _} <- application:loaded_applications()]. reset_after_eunit({OldProcesses, WasAlive, OldAppEnvs, _OldACs}) -> IsAlive = erlang:is_alive(), if not WasAlive andalso IsAlive -> ?DEBUG("Stopping net kernel....\n", []), erl_epmd:stop(), _ = net_kernel:stop(), pause_until_net_kernel_stopped(); true -> ok end, OldApps = [App || {App, _} <- OldAppEnvs], Apps = get_app_names(), _ = [begin _ = case lists:member(App, OldApps) of true -> ok; false -> application:stop(App) end, ok = application:unset_env(App, K) end || App <- Apps, App /= rebar, {K, _V} <- application:get_all_env(App), K =/= included_applications], reconstruct_app_env_vars(Apps), Processes = erlang:processes(), _ = kill_extras(Processes -- OldProcesses), ok. kill_extras(Pids) -> %% Killing any of the procs below will either: %% 1. Interfere with stuff that we don't want interfered with, or %% 2. May/will force the 'kernel' app to shutdown, which *will* %% interfere with rebar's ability To Do Useful Stuff(tm). %% This list may require changes as OTP versions and/or %% rebar use cases change. KeepProcs = [cover_server, eunit_server, eqc, eqc_license, eqc_locked, %% inet_gethost_native is started on demand, when %% doing name lookups. It is under kernel_sup, under %% a supervisor_bridge. inet_gethost_native], Killed = [begin Info = case erlang:process_info(Pid) of undefined -> []; Else -> Else end, Keep1 = case proplists:get_value(registered_name, Info) of undefined -> false; Name -> lists:member(Name, KeepProcs) end, Keep2 = case proplists:get_value(dictionary, Info) of undefined -> false; Ds -> case proplists:get_value('$ancestors', Ds) of undefined -> false; As -> lists:member(kernel_sup, As) end end, if Keep1 orelse Keep2 -> ok; true -> ?DEBUG("Kill ~p ~p\n", [Pid, Info]), exit(Pid, kill), Pid end end || Pid <- Pids], case lists:usort(Killed) -- [ok] of [] -> ?DEBUG("No processes to kill\n", []), []; Else -> lists:foreach(fun(Pid) -> wait_until_dead(Pid) end, Else), Else end. reconstruct_app_env_vars([App|Apps]) -> CmdLine0 = proplists:get_value(App, init:get_arguments(), []), CmdVars = [{list_to_atom(K), list_to_atom(V)} || {K, V} <- CmdLine0], AppFile = (catch filename:join([code:lib_dir(App), "ebin", atom_to_list(App) ++ ".app"])), AppVars = case file:consult(AppFile) of {ok, [{application, App, Ps}]} -> proplists:get_value(env, Ps, []); _ -> [] end, %% App vars specified in config files override those in the .app file. %% Config files later in the args list override earlier ones. AppVars1 = case init:get_argument(config) of {ok, ConfigFiles} -> {App, MergedAppVars} = lists:foldl(fun merge_app_vars/2, {App, AppVars}, ConfigFiles), MergedAppVars; error -> AppVars end, AllVars = CmdVars ++ AppVars1, ?DEBUG("Reconstruct ~p ~p\n", [App, AllVars]), lists:foreach(fun({K, V}) -> application:set_env(App, K, V) end, AllVars), reconstruct_app_env_vars(Apps); reconstruct_app_env_vars([]) -> ok. merge_app_vars(ConfigFile, {App, AppVars}) -> File = ensure_config_extension(ConfigFile), FileAppVars = app_vars_from_config_file(File, App), Dict1 = dict:from_list(AppVars), Dict2 = dict:from_list(FileAppVars), Dict3 = dict:merge(fun(_Key, _Value1, Value2) -> Value2 end, Dict1, Dict2), {App, dict:to_list(Dict3)}. ensure_config_extension(File) -> %% config files must end with .config on disk but when specifying them %% via the -config option the extension is optional BaseFileName = filename:basename(File, ".config"), DirName = filename:dirname(File), filename:join(DirName, BaseFileName ++ ".config"). app_vars_from_config_file(File, App) -> case file:consult(File) of {ok, [Env]} -> proplists:get_value(App, Env, []); _ -> [] end. wait_until_dead(Pid) when is_pid(Pid) -> Ref = erlang:monitor(process, Pid), receive {'DOWN', Ref, process, _Obj, Info} -> Info after 10*1000 -> exit({timeout_waiting_for, Pid}) end; wait_until_dead(_) -> ok. pause_until_net_kernel_stopped() -> pause_until_net_kernel_stopped(10). pause_until_net_kernel_stopped(0) -> exit(net_kernel_stop_failed); pause_until_net_kernel_stopped(N) -> case node() of 'nonode@nohost' -> ?DEBUG("Stopped net kernel.\n", []), ok; _ -> timer:sleep(100), pause_until_net_kernel_stopped(N - 1) end.