TST: Added a test for checking variable deletion behavior

unittests/cfood_variable_deletion.yml

+
+Data:
+  type: Directory
+  match: (.*)
+  subtree:
+    Data_1:
+      type: Directory
+      match: ^Data_1$
+      subtree:
+        Subdir:
+          type: Directory
+          match: ^(?P<test_1>.*)$
+          records:
+            DummyRecord:
+              name: "Record from Data_1"
+              var1: $test_1
+              var2: $test_2
+    Data_2:
+      type: Directory
+      match: ^Data_2$
+      subtree:
+        Subdir:
+          type: Directory
+          match: ^(?P<test_2>.*)$
+          records:
+            DummyRecord:
+              name: "Record from Data_2"
+              var1: $test_1
+              var2: $test_2

unittests/test_scanner.py

@@ -245,3 +245,20 @@ def test_record_generation():
     persons_found = check_properties(persons, check_props)
     for f in persons_found:
         assert f > 0
+
+
+def test_variable_deletion_problems():
+    debug_tree = DebugTree()
+    records = scan_directory(UNITTESTDIR / "test_directories" / "example_variable_deletion",
+                             UNITTESTDIR / "cfood_variable_deletion.yml",
+                             debug_tree=debug_tree)
+
+    for record in records:
+        if record.name == "Record from Data_1":
+            assert record.get_property("var1").value == "bla"
+            assert record.get_property("var2").value == "$test_2"
+        elif record.name == "Record from Data_2":
+            assert record.get_property("var1").value == "$test_1"
+            assert record.get_property("var2").value == "test"
+        else:
+            raise RuntimeError("Wrong name")