Merge branch 'f-server-170' into 'dev'

TST: add tests for caosdb-server#170

See merge request !12

tests/test_issues_server.py

@@ -257,3 +257,47 @@ def test_issue_131():
         "FIND Entity WITH {} > 100.5 €".format(prop.name))]
 
     assert rec.id in result_ids
+
+
+def test_issue_170():
+    """update scalar data type to list data type"""
+    p = db.Property(name="TestProp1", datatype=db.LIST(db.INTEGER))
+    p.value = [1, 2]
+    p.insert()
+
+    p2 = db.execute_query("FIND TestProp1", unique=True)
+    assert p2.datatype == db.LIST(db.INTEGER)
+    assert p2.value == [1, 2]
+
+    p.description = "TestDescription"
+    p.update()  # this failed
+
+    p2 = db.execute_query("FIND TestProp1", unique=True)
+    assert p2.datatype == db.LIST(db.INTEGER)
+    assert p2.value == [1, 2]
+    assert p2.description == "TestDescription"
+
+    p = db.Property(name="TestProp2", datatype=db.DOUBLE)
+    p.insert()
+
+    p.datatype = db.LIST(db.INTEGER)
+    p.update()  # this worked because no value yet
+    p2 = db.execute_query("FIND TestProp2", unique=True)
+    assert p2.datatype == db.LIST(db.INTEGER)
+    p.value = [1, 2]
+
+    p.update()  # this failed
+    p2 = db.execute_query("FIND TestProp2", unique=True)
+    assert p2.datatype == db.LIST(db.INTEGER)
+    assert p2.value == [1, 2]
+
+    p = db.Property(name="TestProp3", datatype=db.DOUBLE)
+    p.insert()
+
+    p.datatype = db.LIST(db.INTEGER)
+    p.value = [1, 2]
+    p.update()  # this failed
+
+    p2 = db.execute_query("FIND TestProp3", unique=True)
+    assert p2.datatype == db.LIST(db.INTEGER)
+    assert p2.value == [1, 2]