aboutsummaryrefslogtreecommitdiffstats
path: root/lib/eunit/src/eunit_lib.erl
blob: f0fd26eb5d57d1d94369b30cd138967561628f8b (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
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
%% This library is free software; you can redistribute it and/or modify
%% it under the terms of the GNU Lesser General Public License as
%% published by the Free Software Foundation; either version 2 of the
%% License, or (at your option) any later version.
%%
%% This library is distributed in the hope that it will be useful, but
%% WITHOUT ANY WARRANTY; without even the implied warranty of
%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
%% Lesser General Public License for more details.
%%
%% You should have received a copy of the GNU Lesser General Public
%% License along with this library; if not, write to the Free Software
%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
%% USA
%%
%% @copyright 2004-2007 Micka�l R�mond, Richard Carlsson
%% @author Micka�l R�mond <[email protected]>
%%   [http://www.process-one.net/]
%% @author Richard Carlsson <[email protected]>
%% @private
%% @see eunit
%% @doc Utility functions for eunit

-module(eunit_lib).

-include("eunit.hrl").
-include("eunit_internal.hrl").


-export([dlist_next/1, uniq/1, fun_parent/1, is_string/1, command/1,
	 command/2, command/3, trie_new/0, trie_store/2, trie_match/2,
	 split_node/1, consult_file/1, list_dir/1, format_exit_term/1,
	 format_exception/1, format_exception/2, format_error/1,
         is_not_test/1]).


%% Type definitions for describing exceptions
%%
%% @type exception() = {exceptionClass(), Reason::term(), stackTrace()}
%%
%% @type exceptionClass() = error | exit | throw
%%
%% @type stackTrace() = [{moduleName(), functionName(),
%%			  arity() | argList()}]
%%
%% @type moduleName() = atom()
%% @type functionName() = atom()
%% @type arity() = integer()
%% @type mfa() = {moduleName(), functionName(), arity()}
%% @type argList() = [term()]
%% @type fileName() = string()


%% ---------------------------------------------------------------------
%% Formatting of error descriptors
format_exception(Exception) ->
    format_exception(Exception, 20).

format_exception({Class,Term,Trace}, Depth)
  when is_atom(Class), is_list(Trace) ->
    case is_stacktrace(Trace) of
	true ->
	    io_lib:format("~s**~w:~s",
			  [format_stacktrace(Trace), Class,
                           format_term(Term, Depth)]);
	false ->
	    format_term(Term, Depth)
    end;
format_exception(Term, Depth) ->
    format_term(Term, Depth).

format_term(Term, Depth) ->
    io_lib:format("~P\n", [Term, Depth]).

format_exit_term(Term) ->
    {Reason, Trace} = analyze_exit_term(Term),
    io_lib:format("~P~s", [Reason, 15, Trace]).

analyze_exit_term({Reason, [_|_]=Trace}=Term) ->
    case is_stacktrace(Trace) of
	true ->
	    {Reason, format_stacktrace(Trace)};
	false ->
	    {Term, ""}
    end;
analyze_exit_term(Term) ->
    {Term, ""}.

is_stacktrace([]) ->
    true;
is_stacktrace([{M,F,A,L}|Fs])
  when is_atom(M), is_atom(F), is_integer(A), is_list(L) ->
    is_stacktrace(Fs);
is_stacktrace([{M,F,As,L}|Fs])
  when is_atom(M), is_atom(F), is_list(As), is_list(L) ->
    is_stacktrace(Fs);
is_stacktrace([{M,F,A}|Fs]) when is_atom(M), is_atom(F), is_integer(A) ->
    is_stacktrace(Fs);
is_stacktrace([{M,F,As}|Fs]) when is_atom(M), is_atom(F), is_list(As) ->
    is_stacktrace(Fs);
is_stacktrace(_) ->
    false.

format_stacktrace(Trace) ->
    format_stacktrace(Trace, "in function", "in call from").

format_stacktrace([{M,F,A,L}|Fs], Pre, Pre1) when is_integer(A) ->
    [io_lib:fwrite("~s ~w:~w/~w~s\n",
                   [Pre, M, F, A, format_stacktrace_location(L)])
     | format_stacktrace(Fs, Pre1, Pre1)];
format_stacktrace([{M,F,As,L}|Fs], Pre, Pre1) when is_list(As) ->
    A = length(As),
    C = case is_op(M,F,A) of
	    true when A =:= 1 ->
		[A1] = As,
		io_lib:fwrite("~s ~s", [F,format_arg(A1)]);
	    true when A =:= 2 ->
		[A1, A2] = As,
		io_lib:fwrite("~s ~s ~s",
			      [format_arg(A1),F,format_arg(A2)]);
	    false ->
		io_lib:fwrite("~w(~s)", [F,format_arglist(As)])
	end,
    [io_lib:fwrite("~s ~w:~w/~w~s\n  called as ~s\n",
		   [Pre,M,F,A,format_stacktrace_location(L),C])
     | format_stacktrace(Fs,Pre1,Pre1)];
format_stacktrace([{M,F,As}|Fs], Pre, Pre1) ->
    format_stacktrace([{M,F,As,[]}|Fs], Pre, Pre1);
format_stacktrace([],_Pre,_Pre1) ->
    "".

format_stacktrace_location(Location) ->
    File = proplists:get_value(file, Location),
    Line = proplists:get_value(line, Location),
    if File =/= undefined, Line =/= undefined ->
            io_lib:format(" (~s, line ~w)", [File, Line]);
       true ->
            ""
    end.

format_arg(A) ->
    io_lib:format("~P",[A,15]).

format_arglist([A]) ->
    format_arg(A);
format_arglist([A|As]) ->
    [io_lib:format("~P,",[A,15]) | format_arglist(As)];
format_arglist([]) ->
    "".

is_op(erlang, F, A) ->
    erl_internal:arith_op(F, A)
	orelse erl_internal:bool_op(F, A)
	orelse erl_internal:comp_op(F, A)
	orelse erl_internal:list_op(F, A)
	orelse erl_internal:send_op(F, A);
is_op(_M, _F, _A) ->
    false.

format_error({bad_test, Term}) ->
    error_msg("bad test descriptor", "~P", [Term, 15]);
format_error({bad_generator, {{M,F,A}, Term}}) ->
    error_msg(io_lib:format("result from generator ~w:~w/~w is not a test",
                            [M,F,A]),
              "~P", [Term, 15]);
format_error({generator_failed, {{M,F,A}, Exception}}) ->
    error_msg(io_lib:format("test generator ~w:~w/~w failed",[M,F,A]),
              "~s", [format_exception(Exception)]);
format_error({no_such_function, {M,F,A}})
  when is_atom(M), is_atom(F), is_integer(A) ->
    error_msg(io_lib:format("no such function: ~w:~w/~w", [M,F,A]),
	      "", []);
format_error({module_not_found, M}) ->
    error_msg("test module not found", "~p", [M]);
format_error({application_not_found, A}) when is_atom(A) ->
    error_msg("application not found", "~w", [A]);
format_error({file_read_error, {_R, Msg, F}}) ->
    error_msg("error reading file", "~s: ~s", [Msg, F]);
format_error({setup_failed, Exception}) ->
    error_msg("context setup failed", "~s",
	      [format_exception(Exception)]);
format_error({cleanup_failed, Exception}) ->
    error_msg("context cleanup failed", "~s",
	      [format_exception(Exception)]);
format_error({{bad_instantiator, {{M,F,A}, Term}}, _DummyException}) ->
    error_msg(io_lib:format("result from instantiator ~w:~w/~w is not a test",
                            [M,F,A]),
              "~P", [Term, 15]);
format_error({instantiation_failed, Exception}) ->
    error_msg("instantiation of subtests failed", "~s",
	      [format_exception(Exception)]).

error_msg(Title, Fmt, Args) ->
    Msg = io_lib:format("**"++Fmt, Args),    % gets indentation right
    io_lib:fwrite("*** ~s ***\n~s\n\n", [Title, Msg]).

-ifdef(TEST).
format_exception_test_() ->
    [?_assertMatch(
        "\nymmud:rorre"++_,
        lists:reverse(lists:flatten(
          format_exception(try erlang:error(dummy)
                           catch C:R -> {C, R, erlang:get_stacktrace()}
                           end)))),
     ?_assertMatch(
        "\nymmud:rorre"++_,
        lists:reverse(lists:flatten(
          format_exception(try erlang:error(dummy, [a])
                           catch C:R -> {C, R, erlang:get_stacktrace()}
                           end))))].
-endif.

%% ---------------------------------------------------------------------
%% detect common return values that are definitely not tests

is_not_test(T) ->
    case T of
        ok -> true;
        error -> true;
        true -> true;
        false -> true;
        undefined -> true;
        {ok, _} -> true;
        {error, _} -> true;
        {'EXIT', _} -> true;
        N when is_number(N) -> true;
        [N|_] when is_number(N) -> true;
        X when is_binary(X) -> true;
        X when is_pid(X) -> true;
        X when is_port(X) -> true;
        X when is_reference(X) -> true;
        _ -> false
    end.

%% ---------------------------------------------------------------------
%% Deep list iterator; accepts improper lists/sublists, and also accepts
%% non-lists on the top level. Nonempty strings (not deep strings) are
%% recognized as separate elements, even on the top level. (It is not
%% recommended to include integers in the deep list, since a list of
%% integers is likely to be interpreted as a string.). The result is
%% always presented as a list (which may be improper), which is either
%% empty or otherwise has a non-list head element.

dlist_next([X | Xs] = Xs0) when is_list(X) ->
    case is_nonempty_string(X) of
	true -> Xs0;
	false -> dlist_next(X, Xs)
    end;
dlist_next([_|_] = Xs) ->
    case is_nonempty_string(Xs) of
	true -> [Xs];
	false -> Xs
    end;
dlist_next([]) ->
    [];
dlist_next(X) ->
    [X].

%% the first two clauses avoid pushing empty lists on the stack
dlist_next([X], Ys) when is_list(X) ->
    case is_nonempty_string(X) of
	true -> [X | Ys];
	false -> dlist_next(X, Ys)
    end;
dlist_next([X], Ys) ->
    [X | Ys];
dlist_next([X | Xs], Ys) when is_list(X) ->
    case is_nonempty_string(X) of
	true -> [X | [Xs | Ys]];
	false -> dlist_next(X, [Xs | Ys])
    end;
dlist_next([X | Xs], Ys) ->
    [X | [Xs | Ys]];
dlist_next([], Xs) ->
    dlist_next(Xs).


-ifdef(TEST).
dlist_test_() ->
    {"deep list traversal",
     [{"non-list term -> singleton list",
       ?_test([any] = dlist_next(any))},
      {"empty list -> empty list",
       ?_test([] = dlist_next([]))},
      {"singleton list -> singleton list",
       ?_test([any] = dlist_next([any]))},
      {"taking the head of a flat list",
       ?_test([a,b,c] = dlist_next([a,b,c]))},
      {"skipping an initial empty list",
       ?_test([a,b,c] = dlist_next([[],a,b,c]))},
      {"skipping nested initial empty lists",
       ?_test([a,b,c] = dlist_next([[[[]]],a,b,c]))},
      {"skipping a final empty list",
       ?_test([] = dlist_next([[]]))},
      {"skipping nested final empty lists",
       ?_test([] = dlist_next([[[[]]]]))},
      {"the first element is in a sublist",
       ?_test([a,b,c] = dlist_next([[a],b,c]))},
      {"recognizing a naked string",
       ?_test(["abc"] = dlist_next("abc"))},
      {"recognizing a wrapped string",
       ?_test(["abc"] = dlist_next(["abc"]))},
      {"recognizing a leading string",
       ?_test(["abc",a,b,c] = dlist_next(["abc",a,b,c]))},
      {"recognizing a nested string",
       ?_test(["abc"] = dlist_next([["abc"]]))},
      {"recognizing a leading string in a sublist",
       ?_test(["abc",a,b,c] = dlist_next([["abc"],a,b,c]))},
      {"traversing an empty list",
       ?_test([] = dlist_flatten([]))},
      {"traversing a flat list",
       ?_test([a,b,c] = dlist_flatten([a,b,c]))},
      {"traversing a deep list",
       ?_test([a,b,c] = dlist_flatten([[],[a,[b,[]],c],[]]))},
      {"traversing a deep but empty list",
       ?_test([] = dlist_flatten([[],[[[]]],[]]))}
     ]}.

%% test support
dlist_flatten(Xs) ->
    case dlist_next(Xs) of
	[X | Xs1] -> [X | dlist_flatten(Xs1)];
	[] -> []
    end.
-endif.


%% ---------------------------------------------------------------------
%% Check for proper Unicode-stringness.

is_string([C | Cs]) when is_integer(C), C >= 0, C =< 16#10ffff ->
    is_string(Cs);
is_string([_ | _]) ->
    false;
is_string([]) ->
    true;
is_string(_) ->
    false.

is_nonempty_string([]) -> false;
is_nonempty_string(Cs) -> is_string(Cs).

-ifdef(TEST).
is_string_test_() ->
    {"is_string",
     [{"no non-lists", ?_assert(not is_string($A))},
      {"no non-integer lists", ?_assert(not is_string([true]))},
      {"empty string", ?_assert(is_string(""))},
      {"ascii string", ?_assert(is_string(lists:seq(0, 127)))},
      {"latin-1 string", ?_assert(is_string(lists:seq(0, 255)))},
      {"unicode string",
       ?_assert(is_string([0, $A, 16#10fffe, 16#10ffff]))},
      {"not above unicode range",
       ?_assert(not is_string([0, $A, 16#110000]))},
      {"no negative codepoints", ?_assert(not is_string([$A, -1, 0]))}
     ]}.
-endif.


%% ---------------------------------------------------------------------
%% Splitting a full node name into basename and hostname,
%% using 'localhost' as the default hostname

split_node(N) when is_atom(N) -> split_node(atom_to_list(N));
split_node(Cs) -> split_node_1(Cs, []).

split_node_1([$@ | Cs], As) -> split_node_2(As, Cs);
split_node_1([C | Cs], As) -> split_node_1(Cs, [C | As]);
split_node_1([], As) ->  split_node_2(As, "localhost").

split_node_2(As, Cs) ->
    {list_to_atom(lists:reverse(As)), list_to_atom(Cs)}.

%% ---------------------------------------------------------------------
%% Get the name of the containing function for a fun. (This is encoded
%% in the name of the generated function that implements the fun.)
fun_parent(F) ->
    {module, M} = erlang:fun_info(F, module),
    {name, N} = erlang:fun_info(F, name),
    case erlang:fun_info(F, type) of
	{type, external} ->
	    {arity, A} = erlang:fun_info(F, arity),
	    {M, N, A};
	{type, local} ->
	    [$-|S] = atom_to_list(N),
	    C1 = string:chr(S, $/),
	    C2 = string:chr(S, $-),
	    {M, list_to_atom(string:sub_string(S, 1, C1 - 1)),
	     list_to_integer(string:sub_string(S, C1 + 1, C2 - 1))}
    end.

-ifdef(TEST).
fun_parent_test() ->
    {?MODULE,fun_parent_test,0} = fun_parent(fun () -> ok end).
-endif.

%% ---------------------------------------------------------------------
%% Ye olde uniq function

uniq([X, X | Xs]) -> uniq([X | Xs]);    
uniq([X | Xs]) -> [X | uniq(Xs)];
uniq([]) -> [].

-ifdef(TEST).
uniq_test_() ->
    {"uniq",
     [?_assertError(function_clause, uniq(ok)),
      ?_assertError(function_clause, uniq([1|2])),
      ?_test([] = uniq([])),
      ?_test([1,2,3] = uniq([1,2,3])),
      ?_test([1,2,3] = uniq([1,2,2,3])),
      ?_test([1,2,3,2,1] = uniq([1,2,2,3,2,2,1])),
      ?_test([1,2,3] = uniq([1,1,1,2,2,2,3,3,3])),
      ?_test(["1","2","3"] = uniq(["1","1","2","2","3","3"]))
     ]}.
-endif.

%% ---------------------------------------------------------------------
%% Replacement for os:cmd

%% TODO: Better cmd support, especially on Windows (not much tested)
%% TODO: Can we capture stderr separately somehow?

command(Cmd) ->
    command(Cmd, "").

command(Cmd, Dir) ->
    command(Cmd, Dir, []).

command(Cmd, Dir, Env) ->
    CD = if Dir =:= "" -> [];
	    true -> [{cd, Dir}]
	 end,
    SetEnv = if Env =:= [] -> []; 
		true -> [{env, Env}]
	     end,
    Opt = CD ++ SetEnv ++ [stream, exit_status, use_stdio,
			   stderr_to_stdout, in, eof],
    P = open_port({spawn, Cmd}, Opt),
    get_data(P, []).

get_data(P, D) ->
    receive
	{P, {data, D1}} ->
	    get_data(P, [D1|D]);
	{P, eof} ->
	    port_close(P),    
	    receive
		{P, {exit_status, N}} ->
		    {N, normalize(lists:flatten(lists:reverse(D)))}
	    end
    end.

normalize([$\r, $\n | Cs]) ->
    [$\n | normalize(Cs)];
normalize([$\r | Cs]) ->
    [$\n | normalize(Cs)];
normalize([C | Cs]) ->
    [C | normalize(Cs)];
normalize([]) ->
    [].

-ifdef(TEST).

cmd_test_() ->
    ([?_test({0, "hello\n"} = ?_cmd_("echo hello"))]
     ++ case os:type() of
	    {unix, _} ->
		unix_cmd_tests();
	    {win32, _} ->
		win32_cmd_tests();
	    _ ->
		[]
	end).

unix_cmd_tests() ->
    [{"command execution, status, and output",
      [?_cmd("echo hello"),
       ?_assertCmdStatus(0, "true"),
       ?_assertCmdStatus(1, "false"),
       ?_assertCmd("true"),
       ?_assertCmdOutput("hello\n", "echo hello"),
       ?_assertCmdOutput("hello", "echo -n hello")
      ]},
     {"file setup and cleanup",
      setup,
      fun () -> ?cmd("mktemp tmp.XXXXXXXX") end,
      fun (File) -> ?cmd("rm " ++ File) end,
      fun (File) ->
	      [?_assertCmd("echo xyzzy >" ++ File),
	       ?_assertCmdOutput("xyzzy\n", "cat " ++ File)]
      end}
    ].

win32_cmd_tests() ->
    [{"command execution, status, and output",
      [?_cmd("echo hello"),
       ?_assertCmdOutput("hello\n", "echo hello")
      ]}
    ].

-endif. % TEST


%% ---------------------------------------------------------------------
%% Wrapper around file:path_consult

%% @throws {file_read_error, {Reason::atom(), Message::string(),
%%                            fileName()}}

consult_file(File) ->
    case file:path_consult(["."]++code:get_path(), File) of
	{ok, Data, _Path} ->
	    Data;
	{error, Reason} ->
	    Msg = file:format_error(Reason),
	    throw({file_read_error, {Reason, Msg, File}})
    end.

%% ---------------------------------------------------------------------
%% Wrapper around file:list_dir

%% @throws {file_read_error, {Reason::atom(), Message::string(),
%%                            fileName()}}

list_dir(Dir) ->
    case file:list_dir(Dir) of
	{ok, Fs} ->
	    Fs;
	{error, Reason} ->
	    Msg = file:format_error(Reason),
	    throw({file_read_error, {Reason, Msg, Dir}})
    end.

%% ---------------------------------------------------------------------
%% A trie for remembering and checking least specific cancelled events
%% (an empty list `[]' simply represents a stored empty list, i.e., all
%% events will match, while an empty tree means that no events match).

trie_new() ->
    gb_trees:empty().

trie_store([_ | _], []) ->
    [];
trie_store([E | Es], T) ->
    case gb_trees:lookup(E, T) of
	none ->
	    if Es =:= [] ->
		    gb_trees:insert(E, [], T);
	       true ->
		    gb_trees:insert(E, trie_store(Es, gb_trees:empty()),
				    T)
	    end;
	{value, []} ->
	    T;  %% prefix already stored
	{value, T1} ->
	    gb_trees:update(E, trie_store(Es, T1), T)
    end;
trie_store([], _T) ->
    [].

trie_match([_ | _], []) ->
    prefix;
trie_match([E | Es], T) ->
    case gb_trees:lookup(E, T) of
	none ->
	    no;
	{value, []} ->
	    if Es =:= [] -> exact;
	       true -> prefix
	    end;
	{value, T1} ->
	    trie_match(Es, T1)
    end;
trie_match([], []) ->
    exact;
trie_match([], _T) ->
    no.

-ifdef(TEST).

trie_test_() ->
    [{"basic representation",
      [?_assert(trie_new() =:= gb_trees:empty()),
       ?_assert(trie_store([1], trie_new())
		=:= gb_trees:insert(1, [], gb_trees:empty())),
       ?_assert(trie_store([1,2], trie_new())
		=:= gb_trees:insert(1,
				    gb_trees:insert(2, [],
						    gb_trees:empty()),
				    gb_trees:empty())),
       ?_assert([] =:= trie_store([1], [])),
       ?_assert([] =:= trie_store([], gb_trees:empty()))
      ]},
     {"basic storing and matching",
      [?_test(no = trie_match([], trie_new())),
       ?_test(exact = trie_match([], trie_store([], trie_new()))),
       ?_test(no = trie_match([], trie_store([1], trie_new()))),
       ?_test(exact = trie_match([1], trie_store([1], trie_new()))),
       ?_test(prefix = trie_match([1,2], trie_store([1], trie_new()))),
       ?_test(no = trie_match([1], trie_store([1,2], trie_new()))),
       ?_test(no = trie_match([1,3], trie_store([1,2], trie_new()))),
       ?_test(exact = trie_match([1,2,3,4,5],
				 trie_store([1,2,3,4,5], trie_new()))),
       ?_test(prefix = trie_match([1,2,3,4,5],
				  trie_store([1,2,3], trie_new()))),
       ?_test(no = trie_match([1,2,2,4,5],
			       trie_store([1,2,3], trie_new())))
      ]},
     {"matching with partially overlapping patterns",
      setup,
      fun () ->
	      trie_store([1,3,2], trie_store([1,2,3], trie_new()))
      end,
      fun (T) ->
	      [?_test(no = trie_match([], T)),
	       ?_test(no = trie_match([1], T)),
	       ?_test(no = trie_match([1,2], T)),
	       ?_test(no = trie_match([1,3], T)),
	       ?_test(exact = trie_match([1,2,3], T)),
	       ?_test(exact = trie_match([1,3,2], T)),
	       ?_test(no = trie_match([1,2,2], T)),
	       ?_test(no = trie_match([1,3,3], T)),
	       ?_test(prefix = trie_match([1,2,3,4], T)),
	       ?_test(prefix = trie_match([1,3,2,1], T))]
      end},
     {"matching with more general pattern overriding less general",
      setup,
      fun () -> trie_store([1], trie_store([1,2,3], trie_new())) end,
      fun (_) -> ok end,
      fun (T) ->
   	      [?_test(no = trie_match([], T)),
	       ?_test(exact = trie_match([1], T)),
 	       ?_test(prefix = trie_match([1,2], T)),
 	       ?_test(prefix = trie_match([1,2,3], T)),
 	       ?_test(prefix = trie_match([1,2,3,4], T))]
      end}
    ].

-endif.  % TEST