Added simple implementation of SignalManager test

tests/CMakeLists.txt

@@ -14,6 +14,7 @@ set(TEST_SOURCES
     Outline.cpp
     Sprite.cpp
     Signal.cpp
+    SignalManager.cpp
     String.cpp
     SvgImage.cpp
     Text.cpp

tests/SignalManager.cpp

@@ -0,0 +1,85 @@
+/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// TGUI - Texus' Graphical User Interface
+// Copyright (C) 2012-2019 Bruno Van de Velde (vdv_b@tgui.eu)
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+#include "Tests.hpp"
+#include <TGUI/SignalManager.hpp>
+#include <TGUI/Widgets/Button.hpp>
+
+
+TEST_CASE("[SignalManager]")
+{
+    tgui::Widget::Ptr widget = tgui::Button::create();
+
+    SECTION("connect")
+    {
+        class MySignalManager : public tgui::SignalManager {
+        public:
+
+            virtual void connect(std::string signalName, tgui::Widget* widget){
+                last_signal_name = signalName;
+                last_widget = widget;
+                ++connected;
+            }
+
+            virtual void remove(std::string signalName, tgui::Widget* widget){
+                last_signal_name = signalName;
+                last_widget = widget;
+                --connected;
+            }
+
+            std::string last_signal_name;
+            tgui::Widget* last_widget;
+            int connected = 0;
+        };
+
+        std::shared_ptr<MySignalManager> m = std::make_shared<MySignalManager>();
+        tgui::SignalManager::setDefaultSignalManager(m);
+        REQUIRE(tgui::SignalManager::getSignalManager().get() == m.get());
+        widget->setCallbackID("w1");
+        REQUIRE(m->last_signal_name == "w1");
+        REQUIRE(m->last_widget == widget.get());
+        REQUIRE(m->connected == 1);
+        widget->setCallbackID("w2");
+        REQUIRE(m->connected == 1);
+        {
+            tgui::Button::Ptr b = std::dynamic_pointer_cast<tgui::Button>(widget);
+            auto widget2 = tgui::Button::copy(b);
+            REQUIRE(m->connected == 2);
+        }
+        REQUIRE(m->connected == 1);
+        {
+            tgui::Button::Ptr widget2  = tgui::Button::create();
+            widget2->setCallbackID("w3");
+            REQUIRE(m->connected == 2);
+            *widget = std::move(*widget2);
+            REQUIRE(m->connected == 1);
+        }
+        REQUIRE(m->connected == 1);
+        widget->setCallbackID("");
+        REQUIRE(m->connected == 0);
+        widget->setCallbackID("w1");
+        widget = nullptr;
+        REQUIRE(m->connected == 0);
+    }
+}