1 files changed, 83 insertions, 0 deletions
diff --git a/lib/stdlib/test/dict_test_lib.erl b/lib/stdlib/test/dict_test_lib.erl
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+++ b/lib/stdlib/test/dict_test_lib.erl
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+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2008-2009. 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(dict_test_lib, [Mod,Equal]).
+
+-export([module/0,equal/2,empty/0,size/1,to_list/1,from_list/1,
+	 enter/3,delete/2,lookup/2]).
+
+module() ->
+    Mod.
+
+equal(X, Y) ->
+    Equal(X, Y).
+
+empty() ->
+    case erlang:function_exported(Mod, new, 0) of
+	false -> Mod:empty();
+	true -> Mod:new()
+    end.
+
+size(S) ->
+    Mod:size(S).
+
+to_list(S) ->
+    Mod:to_list(S).
+
+from_list(S) ->
+    case erlang:function_exported(Mod, from_orddict, 1) of
+	false ->
+	    Mod:from_list(S);
+	true ->
+	    %% The gb_trees module has no from_list/1 function.
+	    %%
+	    %% The keys in S are not unique. To make sure
+	    %% that we pick the same key/value pairs as
+	    %% dict/orddict, first convert the list to an orddict.
+	    Orddict = orddict:from_list(S),
+	    Mod:from_orddict(Orddict)
+    end.
+
+%% Store new value into dictionary or update previous value in dictionary.
+enter(Key, Val, Dict) ->
+    case erlang:function_exported(Mod, store, 3) of
+	false ->
+	    Mod:enter(Key, Val, Dict);
+	true ->
+	    Mod:store(Key, Val, Dict)
+    end.
+
+%% Delete an EXISTING key.
+delete(Key, Dict) ->
+    case erlang:function_exported(Mod, delete, 2) of
+	true -> Mod:delete(Key, Dict);
+	false -> Mod:erase(Key, Dict)
+    end.
+
+%% -> none | {value,Value}
+lookup(Key, Dict) ->
+    case erlang:function_exported(Mod, lookup, 2) of
+	false ->
+	    case Mod:find(Key, Dict) of
+		error -> none;
+		{ok,Value} -> {value,Value}
+	    end;
+	true ->
+	    Mod:lookup(Key, Dict)
+    end.