1 files changed, 124 insertions, 0 deletions
diff --git a/lib/stdlib/test/sets_test_lib.erl b/lib/stdlib/test/sets_test_lib.erl
new file mode 100644
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+++ b/lib/stdlib/test/sets_test_lib.erl
@@ -0,0 +1,124 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2004-2009. All Rights Reserved.
+%% 
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%% 
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%% 
+%% %CopyrightEnd%
+%%
+
+-module(sets_test_lib, [Mod,Equal]).
+
+-export([module/0,equal/2,empty/0,from_list/1,to_list/1,singleton/1,
+	 add_element/2,del_element/2,size/1,is_empty/1,is_set/1,
+	 intersection/1,intersection/2,subtract/2,
+	 union/1,union/2,is_subset/2,fold/3,filter/2]).
+
+module() ->
+    Mod.
+
+equal(X, Y) ->
+    Equal(X, Y).
+
+empty() ->
+    Mod:new().
+
+from_list(L) ->
+    Mod:from_list(L).
+
+to_list(S) ->
+    Mod:to_list(S).
+
+singleton(E) ->
+    case erlang:function_exported(Mod, singleton, 1) of
+	true -> Mod:singleton(E);
+	false -> from_list([E])
+    end.
+
+add_element(El, S0) ->
+    S = Mod:add_element(El, S0),
+    true = Mod:is_element(El, S),
+    false = is_empty(S),
+    true = Mod:is_set(S),
+    S.
+
+del_element(El, S0) ->
+    S = Mod:del_element(El, S0),
+    false = Mod:is_element(El, S),
+    true = Mod:is_set(S),
+    S.
+
+size(S) ->
+    Mod:size(S).
+
+is_empty(S) ->
+    true = Mod:is_set(S),
+    case erlang:function_exported(Mod, is_empty, 1) of
+	true -> Mod:is_empty(S);
+	false -> Mod:size(S) == 0
+    end.
+
+is_set(S) ->
+    Mod:is_set(S).
+
+intersection(S1, S2) ->
+    S = Mod:intersection(S1, S2),
+    true = Equal(S, Mod:intersection(S2, S1)),
+    Disjoint = is_empty(S),
+    Disjoint = Mod:is_disjoint(S1, S2),
+    Disjoint = Mod:is_disjoint(S2, S1),
+    S.
+
+intersection(Ss) ->
+    S = Mod:intersection(Ss),
+    true = Equal(S, Mod:intersection(lists:reverse(Ss))),
+    S.
+
+subtract(S1, S2) ->
+    S = Mod:subtract(S1, S2),
+    true = Mod:is_set(S),
+    true = Mod:size(S) =< Mod:size(S1),
+    S.
+	    
+union(S1, S2) ->
+    S = Mod:union(S1, S2),
+    true = Equal(S, Mod:union(S2, S1)),
+    true = Mod:is_set(S),
+    S.
+
+union(Ss) ->
+    S = Mod:union(Ss),
+    true = Equal(S, Mod:union(lists:reverse(Ss))),
+    S.
+		 
+is_subset(S, Set) ->
+    case Mod:is_subset(S, Set) of
+	false -> false;
+	true ->
+	    case Mod:is_subset(Set, S) of
+		false -> ok;
+		true ->
+		    %% The sets are subsets of each other.
+		    %% They must be equal.
+		    true = Equal(S, Set)
+	    end,
+	    true
+    end.
+
+fold(F, A, S) ->
+    true = Mod:is_set(S),
+    Mod:fold(F, A, S).
+
+filter(F, S) ->
+    true = Mod:is_set(S),
+    Mod:filter(F, S).