Simple test suite added

tests/manual_test.py

@@ -0,0 +1,12 @@
+import sys
+from bedit_core.serialization import load, save
+from bedit_core.bondgraph import causality_inference
+
+def main(path: str):
+    doc = load(path)
+    for id, root in doc.root.items():
+        doc.root[id] = causality_inference(doc.root[id])
+    save(doc, path)
+
+if __name__ == "__main__":
+    main(sys.argv[1])