R: Fix single test runner

.vscode/launch.json

@@ -42,8 +42,8 @@
       "type": "debugpy",
       "request": "launch",
       "cwd": "${workspaceFolder}/rsconcept/backend",
-      "program": "${workspaceFolder}/rsconcept/backend/manage.py",
-      "args": ["test", "-k", "${fileBasenameNoExtension}"],
+      "program": "${workspaceFolder}/rsconcept/backend/run_testfile.py",
+      "args": ["${file}"],
       "django": true
     },
     {

rsconcept/backend/run_testfile.py

@@ -0,0 +1,9 @@
+import os
+import sys
+
+filepath = sys.argv[1]
+project_root = os.path.join(os.path.dirname(__file__))
+relpath = os.path.relpath(filepath, project_root)
+module_path = relpath.replace('/', '.').replace('\\', '.').rstrip('.py')
+
+os.system(f"python manage.py test {module_path}")