Added some kind of unit testing for version numbers in graphics

restrictions. It's only doing asserts for the tests :)  Use
--unit-testing command line switch.

src/config/user_config.hpp

@@ -475,6 +475,9 @@ namespace UserConfigParams
         &m_video_group, "Enable Exponential Shadow Map (better but slower)"));
 
     // ---- Debug - not saved to config file
+    /** If gamepad debugging is enabled. */
+    PARAM_PREFIX bool m_unit_testing PARAM_DEFAULT(false);
+
     /** If gamepad debugging is enabled. */
     PARAM_PREFIX bool m_gamepad_debug PARAM_DEFAULT( false );
 

src/graphics/graphics_restrictions.cpp

@@ -352,9 +352,9 @@ public:
  */
 void unitTesting()
 {
-    assert(Version("1") == Version("1"));
-    assert(Version("1") != Version("2"));
-    assert(Version("1") <= Version("2"));
+    assert(Version("1")     == Version("1"));
+    assert(Version("1")     != Version("2"));
+    assert(Version("1")     <= Version("2"));
     assert(Version("1")     <  Version("2"));
     assert(Version("1.2.3") <  Version("2"));
     assert(Version("1.2.3") <  Version("1.3"));

src/main.cpp

@@ -657,7 +657,9 @@ int handleCmdLine()
     bool try_login = false;
     irr::core::stringw login, password;
 
-    if(CommandLine::has("--gamepad-debug"))
+    if (CommandLine::has("--unit-testing"))
+        UserConfigParams::m_unit_testing = true;
+    if (CommandLine::has("--gamepad-debug"))
         UserConfigParams::m_gamepad_debug=true;
     if (CommandLine::has("--keyboard-debug"))
         UserConfigParams::m_keyboard_debug = true;
@@ -1286,10 +1288,11 @@ int main(int argc, char *argv[] )
             }
         }
 
-//#define UNIT_TEST
-#ifdef UNIT_TEST
-        GraphicsRestrictions::unitTesting();
-#endif
+        if(UserConfigParams::m_unit_testing)
+        {
+            GraphicsRestrictions::unitTesting();
+            exit(0);
+        }
 
         // Note that on the very first run of STK internet status is set to
         // "not asked", so the report will only be sent in the next run.