Tests for obligatory properties

Summary

Tests for caosdb-server!18 (merged)

Bug report in caosdb-server#146 (closed)

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tests/test_importance.py

@@ -40,7 +40,7 @@ def test_obl_missing_error():
     rt1.add_property(name="TestOblProperty", importance=db.OBLIGATORY)
     rt1.insert()
 
-    # normal behaviour
+    # normal behaviour, should be identical to "error" level
     rt2 = db.RecordType(name="TestRecordType2")
     rt2.add_parent("TestRecordType1", inheritance=db.NONE)
     rt2.add_property("TestDummyProperty")
@@ -64,7 +64,8 @@ def test_obl_missing_error():
     rt2.set_flag("force-missing-obligatory", "warn")
     with raises(db.TransactionError) as exc:
         rt2.insert(strict=True)
-    assert exc.value.errors[0].msg == "A warning occured while processing an entity with the strict flag."
+    assert exc.value.errors[0].msg == (
+        "A warning occured while processing an entity with the strict flag.")
     assert "An obligatory property is missing." in [
         w.description for w in rt2.get_warnings()]
 
@@ -75,8 +76,8 @@ def test_obl_missing_error():
     rt2.set_flag("force-missing-obligatory", "warn")
     rt2.insert()
     assert len(rt2.get_errors()) == 0
-    assert rt2.get_warnings(
-    )[0].description == "An obligatory property is missing."
+    assert (rt2.get_warnings()[0].description
+            == "An obligatory property is missing.")
 
     # insert silently
     rt3 = db.RecordType(name="TestRecordType3")
@@ -105,6 +106,8 @@ def test_obl_missing_parent_in_same_container():
 
 
 def test_obl_missing_parent_in_same_container_override():
+    """`force-missing-obligatory` flags of entities override flags of containing containers.
+    """
     p = db.Property(name="TestOblProperty", datatype=db.TEXT).insert()
 
     rt1 = db.RecordType(name="TestRecordType1")
@@ -122,6 +125,8 @@ def test_obl_missing_parent_in_same_container_override():
 
 
 def test_sub_property_of_obl():
+    """If p1 <|- p2, then p2 should work for an obligatory p1.
+    """
     p1 = db.Property(name="TestOblProperty1", datatype=db.TEXT).insert()
     p2 = db.Property(name="TestOblProperty2", datatype=db.TEXT)
     p2.add_parent("TestOblProperty1")