Merge pull request #55 from shino/parametrized-module

Allow mocking of parametrized modules

Author: eproxus

src/meck_mod.erl

@@ -80,8 +80,13 @@ compile_options(Module) ->
   filter_options(proplists:get_value(options, Module:module_info(compile))).
 
 -spec rename_module(erlang_form(), module()) -> erlang_form().
-rename_module([{attribute, Line, module, _OldName}|T], NewName) ->
-    [{attribute, Line, module, NewName}|T];
+rename_module([{attribute, Line, module, OldAttribute}|T], NewName) ->
+    case OldAttribute of
+        {_OldName, Variables} ->
+            [{attribute, Line, module, {NewName, Variables}}|T];
+        _OldName ->
+            [{attribute, Line, module, NewName}|T]
+    end;
 rename_module([H|T], NewName) ->
     [H|rename_module(T, NewName)].
 

test/meck_test_parametrized_module.erl

@@ -0,0 +1,7 @@
+-module(meck_test_parametrized_module, [Var1, Var2]).
+-export([which/0, var1/0, var2/0]).
+
+which() -> original.
+
+var1() -> {original, Var1}.
+var2() -> {original, Var2}.

test/meck_tests.erl

@@ -807,6 +807,32 @@ cannot_expect_bif_or_autogenerated_test() ->
                  meck:expect(unicode, module_info, 0, doh)),
     ?assertEqual(ok, meck:unload(unicode)).
 
+meck_parametrized_module_test() ->
+    ?assertEqual(ok, meck:new(meck_test_parametrized_module)),
+    ?assertEqual(ok, meck:expect(meck_test_parametrized_module, new,
+                                 fun(V1, V2) ->
+                                     {meck_test_parametrized_module, V1, V2}
+                                 end)),
+    ?assertEqual(ok, meck:expect(meck_test_parametrized_module, which, 1, mecked)),
+    Object = meck_test_parametrized_module:new(var1, var2),
+    ?assertEqual(mecked, Object:which()),
+    ?assertEqual(ok, meck:unload(meck_test_parametrized_module)).
+
+meck_parametrized_module_passthrough_test() ->
+    ?assertEqual(ok, meck:new(meck_test_parametrized_module, [passthrough])),
+    ?assertEqual(ok, meck:expect(meck_test_parametrized_module, new,
+                                 fun(V1, V2) ->
+                                     {meck_test_parametrized_module, V1, V2}
+                                 end)),
+    ?assertEqual(ok, meck:expect(meck_test_parametrized_module, var2,
+                                 fun({_, _Var1, Var2} = _This) ->
+                                     {mecked, Var2}
+                                 end)),
+    Object = meck_test_parametrized_module:new(var1, var2),
+    ?assertEqual({original, var1}, Object:var1()),
+    ?assertEqual({mecked, var2}, Object:var2()),
+    ?assertEqual(ok, meck:unload(meck_test_parametrized_module)).
+
 %%==============================================================================
 %% Internal Functions
 %%==============================================================================