Fixed issues in the Factory code and tests

include/factory.hpp

@@ -17,6 +17,12 @@ Fichier contenant la class singleton template Factory, à qui on peut associer d
 #include <vector>
 #include <type_traits>
 
+namespace detail
+{
+template <typename _Base, typename Child>
+bool register_to_factory();
+}
+
 /**
 \class Factory
 \brief Représente une fabrique fabriquant des objets de classe mère Base
@@ -27,7 +33,7 @@ template <typename Base>
 class Factory
 {
     template <typename _Base, typename Child>
-    friend bool register_to_factory();
+    friend bool detail::register_to_factory();
 
 public:
     //! \brief Retourne un objet créé à partir de choice

tests/factory_tests.cpp

@@ -33,9 +33,10 @@ REGISTER_FACTORY_ENTRY(Transition, GenerationsTransition);
 
 void CellulutTests::test_factory()
 {
-    QCOMPARE(Factory<Transition>::list_choices().size(), 2);
-    QCOMPARE(Factory<Transition>::list_choices()[0], "life-like");
-    QCOMPARE(Factory<Transition>::list_choices()[1], "generations");
+    QCOMPARE(Factory<Transition>::list_choices().size(), 2ull);
+    const auto choices = Factory<Transition>::list_choices();
+    QCOMPARE(std::count(choices.begin(), choices.end(), "life-like"), 1);
+    QCOMPARE(std::count(choices.begin(), choices.end(), "generations"), 1);
 
 
     std::unique_ptr<Transition> life_trans = Factory<Transition>::make("life-like");