aboutsummaryrefslogtreecommitdiffstats
path: root/lib/test_server/src/test_server_gl.erl
blob: 356a3288b801d5f9080491e44209b5c6b9c9d55d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2012-2013. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%%     http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
%% This module implements group leader processes for test cases.
%% Each group leader process handles output to the minor log file for
%% a test case, and calls test_server_io to handle output to the common
%% log files. The group leader processes are created and destroyed
%% through the test_server_io module/process.

-module(test_server_gl).
-export([start_link/0,stop/1,set_minor_fd/3,unset_minor_fd/1,
	 get_tc_supervisor/1,print/4,set_props/2]).

-export([init/1,handle_call/3,handle_cast/2,handle_info/2,terminate/2]).

-record(st, {tc_supervisor :: 'none'|pid(),    %Test case supervisor
	     tc :: mfa(),		       %Current test case MFA
	     minor :: 'none'|pid(),	       %Minor fd
	     minor_monitor,		       %Monitor ref for minor fd
	     capture :: 'none'|pid(),	       %Capture output
	     reject_io :: boolean(),	       %Reject I/O requests...
	     permit_io,			       %... and exceptions
	     auto_nl=true :: boolean(),	       %Automatically add NL
	     levels			       %{Stdout,Major,Minor}
	    }).

%% start_link()
%%  Start a new group leader process. Only to be called by
%%  the test_server_io process.

start_link() ->
    case gen_server:start_link(?MODULE, [], []) of
	{ok,Pid} ->
	    {ok,Pid};
	Other ->
	    Other
    end.


%% stop(Pid)
%%  Stop a group leader process. Only to be called by
%%  the test_server_io process.

stop(GL) ->
    gen_server:cast(GL, stop).


%% set_minor_fd(GL, Fd, MFA)
%%  GL = Pid for the group leader process
%%  Fd = file descriptor for the minor log file
%%  MFA = {M,F,A} for the test case owning the minor log file
%%
%%  Register the file descriptor for the minor log file. Subsequent
%%  IO directed to the minor log file will be written to this file.
%%  Also register the currently executing process at the testcase
%%  supervisor corresponding to this group leader process.

set_minor_fd(GL, Fd, MFA) ->
    req(GL, {set_minor_fd,Fd,MFA,self()}).


%% unset_minor_fd(GL, Fd, MFA)
%%  GL = Pid for the group leader process
%%
%%  Unregister the file descriptor for minor log file (typically
%%  because the test case has ended the minor log file is about
%%  to be closed). Subsequent IO (for example, by a process spawned
%%  by the testcase process) will go to the unexpected_io log file.

unset_minor_fd(GL) ->
    req(GL, unset_minor_fd).


%% get_tc_supervisor(GL)
%%  GL = Pid for the group leader process
%%
%%  Return the Pid for the process that supervises the test case
%%  that has this group leader.

get_tc_supervisor(GL) ->
    req(GL, get_tc_supervisor).


%% print(GL, Detail, Format, Args) -> ok
%%  GL = Pid for the group leader process
%%  Detail = integer() | minor | major | html | stdout
%%  Msg = iodata()
%%  Printer = internal | pid()
%%
%%  Print a message to one of the log files. If Detail is an integer,
%%  it will be compared to the levels (set by set_props/2) to
%%  determine which log file(s) that are to receive the output. If
%%  Detail is an atom, the value of the atom will directly determine
%%  which log file to use.  IO to the minor log file will be handled
%%  directly by this group leader process (printing to the file set by
%%  set_minor_fd/3), and all other IO will be handled by calling
%%  test_server_io:print/3.

print(GL, Detail, Msg, Printer) ->
    req(GL, {print,Detail,Msg,Printer}).


%% set_props(GL, [PropertyTuple])
%%  GL = Pid for the group leader process
%%  PropertyTuple = {levels,{Show,Major,Minor}} |
%%                  {auto_nl,boolean()} |
%%                  {reject_io_reqs,boolean()}
%%
%%  Set properties for this group leader process.

set_props(GL, PropList) ->
    req(GL, {set_props,PropList}).

%%% Internal functions.

init([]) ->
    {ok,#st{tc_supervisor=none,
	    minor=none,
	    minor_monitor=none,
	    capture=none,
	    reject_io=false,
	    permit_io=gb_sets:empty(),
	    auto_nl=true,
	    levels={1,19,10}
	   }}.

req(GL, Req) ->
    gen_server:call(GL, Req, infinity).

handle_call(get_tc_supervisor, _From, #st{tc_supervisor=Pid}=St) ->
    {reply,Pid,St};
handle_call({set_minor_fd,Fd,MFA,Supervisor}, _From, St) ->
    Ref = erlang:monitor(process, Fd),
    {reply,ok,St#st{tc=MFA,minor=Fd,minor_monitor=Ref,
		    tc_supervisor=Supervisor}};
handle_call(unset_minor_fd, _From, St) ->
    {reply,ok,St#st{minor=none,tc_supervisor=none}};
handle_call({set_props,PropList}, _From, St) ->
    {reply,ok,do_set_props(PropList, St)};
handle_call({print,Detail,Msg,Printer}, {From,_}, St) ->
    output(Detail, Msg, Printer, From, St),
    {reply,ok,St}.

handle_cast(stop, St) ->
    {stop,normal,St}.

handle_info({'DOWN',Ref,process,_,Reason}=D, #st{minor_monitor=Ref}=St) ->
    case Reason of
	normal -> ok;
	_ ->
	    Data = io_lib:format("=== WARNING === TC: ~w\n"
				 "Got down from minor Fd ~w: ~w\n\n",
				 [St#st.tc,St#st.minor,D]),
	    test_server_io:print_unexpected(Data)
    end,
    {noreply,St#st{minor=none,minor_monitor=none}};
handle_info({permit_io,Pid}, #st{permit_io=P}=St) ->
    {noreply,St#st{permit_io=gb_sets:add(Pid, P)}};
handle_info({capture,Cap0}, St) ->
    Cap = case Cap0 of
	      false -> none;
	      Pid when is_pid(Cap0) -> Pid
	  end,
    {noreply,St#st{capture=Cap}};
handle_info({io_request,From,ReplyAs,Req}=IoReq, St) ->
    try	io_req(Req, From, St) of
	passthrough ->
	    group_leader() ! IoReq;
	Data ->
	    case is_io_permitted(From, St) of
		false ->
		    ok;
		true ->
		    case St of
			#st{capture=none} ->
			    ok;
			#st{capture=CapturePid} ->
			    CapturePid ! {captured,Data}
		    end,


		    %%! PROBLEM HERE! 
		    %%! Data could come html tagged from CT!!

		    %EscapedChars = test_server_ctrl:escape_chars(Data),
		    EscapedChars = Data,

		    output(minor, EscapedChars, From, From, St)
	    end,
	    From ! {io_reply,ReplyAs,ok}
    catch
	_:_ ->
	    From ! {io_reply,ReplyAs,{error,arguments}}
    end,
    {noreply,St};
handle_info({structured_io,ClientPid,{Detail,Str}}, St) ->
    output(Detail, Str, ClientPid, ClientPid, St),
    {noreply,St};
handle_info({printout,Detail,Format,Args}, St) ->
    Str = io_lib:format(Format, Args),
    output(Detail, Str, internal, none, St),
    {noreply,St};
handle_info(Msg, #st{tc_supervisor=Pid}=St) when is_pid(Pid) ->
    %% The process overseeing the testcase process also used to be
    %% the group leader; thus, it is widely expected that it can be
    %% reached by sending a message to the group leader. Therefore
    %% we'll need to forward any non-recognized messaged to the test
    %% case supervisor.
    Pid ! Msg,
    {noreply,St};
handle_info(_Msg, #st{}=St) ->
    %% There is no known supervisor process. Ignore this message.
    {noreply,St}.

terminate(_, _) ->
    ok.

do_set_props([{levels,Levels}|Ps], St) ->
    do_set_props(Ps, St#st{levels=Levels});
do_set_props([{auto_nl,AutoNL}|Ps], St) ->
    do_set_props(Ps, St#st{auto_nl=AutoNL});
do_set_props([{reject_io_reqs,Bool}|Ps], St) ->
    do_set_props(Ps, St#st{reject_io=Bool});
do_set_props([], St) -> St.

io_req({put_chars,Enc,Bytes}, _, _) when Enc =:= latin1; Enc =:= unicode  ->
    unicode:characters_to_list(Bytes, Enc);
io_req({put_chars,Encoding,Mod,Func,[Format,Args]}, _, _) ->
    Str = Mod:Func(Format, Args),
    unicode:characters_to_list(Str, Encoding);
io_req(_, _, _) -> passthrough.

output(Level, Str, Sender, From, St) when is_integer(Level) ->
    case selected_by_level(Level, stdout, St) of
	true -> output(stdout, Str, Sender, From, St);
	false -> ok
    end,
    case selected_by_level(Level, major, St) of
	true -> output(major, Str, Sender, From, St);
	false -> ok
    end,
    case selected_by_level(Level, minor, St) of
	true -> output(minor, Str, Sender, From, St);
	false -> ok
    end;
output(stdout, Str, _Sender, From, St) ->
    output_to_file(stdout, Str, From, St);
output(html, Str, _Sender, From, St) ->
    output_to_file(html, Str, From, St);
output(Level, Str, Sender, From, St) when is_atom(Level) ->
    output_to_file(Level, dress_output(Str, Sender, St), From, St).

output_to_file(minor, Data0, From, #st{tc={M,F,A},minor=none}) ->
    Data = [io_lib:format("=== ~w:~w/~w\n", [M,F,A]),Data0],
    test_server_io:print(From, unexpected_io, Data),
    ok;
output_to_file(minor, Data, From, #st{tc=TC,minor=Fd}) ->
    try
	io:put_chars(Fd, Data)
    catch
	Type:Reason ->
	    Data1 =
		[io_lib:format("=== ERROR === TC: ~w\n"
			       "Failed to write to minor Fd: ~w\n"
			       "Type: ~w\n"
			       "Reason: ~w\n",
			       [TC,Fd,Type,Reason]),
		 Data,"\n"],
	    test_server_io:print(From, unexpected_io, Data1)
    end;
output_to_file(Detail, Data, From, _) ->
    test_server_io:print(From, Detail, Data).

is_io_permitted(From, #st{reject_io=true,permit_io=P}) ->
    gb_sets:is_member(From, P);
is_io_permitted(_, #st{reject_io=false}) -> true.

selected_by_level(Level, stdout, #st{levels={Stdout,_,_}}) ->
    Level =< Stdout;
selected_by_level(Level, major, #st{levels={_,Major,_}}) ->
    Level =< Major;
selected_by_level(Level, minor, #st{levels={_,_,Minor}}) ->
    Level >= Minor.

dress_output([$=|_]=Str, internal, _) ->
    [Str,$\n];
dress_output(Str, internal, _) ->
    ["=== ",Str,$\n];
dress_output(Str, _, #st{auto_nl=AutoNL}) ->
    case AutoNL of
	true -> [Str,$\n];
	false -> Str
    end.