FIX: check for empty database contained a bug

integrationtests/test.py

@@ -36,6 +36,7 @@ import caosdb as db
 from newcrawler.identifiable_adapters import CaosDBIdentifiableAdapter
 import pytest
 from caosadvancedtools.models.parser import parse_model_from_yaml
+import yaml
 
 import os
 
@@ -60,10 +61,21 @@ def not_test_record(r: db.Record):
     return True
 
 def register_test():
-    info = str(db.Info())
-    if "without" not in info:
+    info = db.Info()
+    for info_element in info.messages:
+        if info_element.startswith("<Counts>"):
+            counts = yaml.load(info_element[8:-9], Loader=yaml.SafeLoader)
+            for count_element in ['records',
+                                  'properties',
+                                  'recordTypes',
+                                  'files',
+                                  'fssize']:
+                if counts[count_element] > 0:
                     raise RuntimeError("This instance of CaosDB contains entities already."
                                        "It must be empty in order to gegister a new test.")
+            break
+    else:
+        raise RuntimeError("Response from server for Info could not be interpreted.")
     
     answer = input("This method will register your current test with key {} with the currently"
                    " running instance of CaosDB. Do you want to continue (y/N)?".format(