TST: Add tests for SELECT updates

CHANGELOG.md

@@ -29,6 +29,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   [caosdb-server#132](https://gitlab.indiscale.com/caosdb/src/caosdb-server/-/issues/132)
 * Tests for missing obligatory Properties
   [caosdb-server#146](https://gitlab.indiscale.com/caosdb/src/caosdb-server/-/issues/146)
+* Tests for updates of SELECT results, two still marked as `xfail`
+  until
+  [caosdb-pylib#48](https://gitlab.indiscale.com/caosdb/src/caosdb-pylib/-/issues/48)
+  and
+  [caosdb-server#155](https://gitlab.indiscale.com/caosdb/src/caosdb-server/-/issues/155)
+  have been resolved.
 
 
 ### Changed (for changes in existing functionality)

tests/test_select.py

@@ -5,6 +5,8 @@
 #
 # Copyright (C) 2018 Research Group Biomedical Physics,
 # Max-Planck-Institute for Dynamics and Self-Organization Göttingen
+# Copyright (C) 2021 IndiScale GmbH <info@indiscale.com>
+# Copyright (C) 2021 Florian Spreckelsen <f.spreckelsen@indiscale.com>
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as
@@ -25,6 +27,8 @@
 
 @author: tf
 """
+from pytest import mark, raises
+
 import caosdb as db
 
 
@@ -530,3 +534,45 @@ def test_select_with_subtyping_semantics_and_name_duplicates():
     db.Property(name="TestHousePart", description="This is a duplicate",
                 datatype=db.TEXT).insert(unique=False)
     test_select_with_subtyping_semantics()
+
+
+def test_select_update():
+    """Ensure that the result of a SELECT query can't be used for an
+    update (which might result in data loss).
+
+    """
+    select_result = db.execute_query("SELECT name FROM RECORD TestHouse")[0]
+
+    with raises(db.CaosDBException):
+        select_result.update()
+
+
+@mark.xfail(reason="see pylib issue #48 and server issue #155")
+def test_select_update_with_parent():
+    """Ensure that even with a valid parent, the result of a SELECT query
+    can't be updated.
+
+    """
+
+    test_house_rt = db.RecordType(name="TestHouse").retrieve()
+    select_result = db.execute_query("SELECT name FROM RECORD TestHouse")[0]
+    select_result.add_parent(test_house_rt)
+
+    with raises(db.CaosDBException):
+        select_result.update()
+
+
+@mark.xfail(reason="see pylib issue #48 and server issue #155")
+def test_select_update_with_force():
+    """The update of the result of a SELECT query  may be forced."""
+    test_house_rt = db.RecordType(name="TestHouse").retrieve()
+    select_result = db.execute_query("SELECT name FROM RECORD TestHouse")[0]
+    select_result.add_parent(test_house_rt)
+
+    # TODO: The syntax may change here depending on the implementation
+    # of caosdb-pylib#48
+    select_result.update(force_incomplete=True)
+
+    # only name has been selected and updated, so no properties remain:
+    rec = db.Record(name=select_result.name).retrieve()
+    assert len(rec.properties) == 0