Disables debugger tests when debugger is not available

Author: JohanMabille

test/CMakeLists.txt

@@ -50,9 +50,14 @@ include_directories(${GTEST_INCLUDE_DIRS} SYSTEM)
 set(XEUS_PYTHON_TESTS
     main.cpp
     ../src/xutils.cpp
-    test_debugger.cpp
-    xeus_client.hpp
-    xeus_client.cpp
+)
+
+if (XPYTHON_DEBUGGER_AVAILABLE)
+    list(APPEND ${XEUS_PYTHON_TESTS} 
+        test_debugger.cpp
+        xeus_client.hpp
+        xeus_client.cpp
+    )
 )
 
 add_executable(test_xeus_python ${XEUS_PYTHON_TESTS})