#410: skeleton test suite for the CommandManager

Currently a single trivial test which confirms only that we can obtain
the CommandManager module.

libs/parser/Tokeniser.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <string>
+#include <iterator>
 #include "string/tokeniser.h"
 #include "ParseException.h"
 

test/CMakeLists.txt

@@ -5,6 +5,7 @@ add_executable(drtest
                Brush.cpp
                Camera.cpp
                ColourSchemes.cpp
+               CommandSystem.cpp
                ContinuousBuffer.cpp
                CSG.cpp
                Entity.cpp

test/CommandSystem.cpp

@@ -0,0 +1,14 @@
+#include "RadiantTest.h"
+
+namespace test
+{
+
+using CommandSystemTest = RadiantTest;
+
+TEST_F(CommandSystemTest, GetCommandSystem)
+{
+    const auto& mod = GlobalCommandSystem();
+    EXPECT_EQ(mod.getName(), "CommandSystem");
+}
+
+}