fix: graceful handling of malformed element declarations; quiet absent-element log

tests/unit/test_page.py

@@ -46,6 +46,14 @@ class TestElementResolution:
     def test_missing_key_returns_none(self):
         assert BasePage(make_browser()).find_element_locators("nope") is None
 
+    def test_empty_override_still_inherits_ancestors(self):
+        class Grandchild(ChildPage):
+            elements = {}  # declares nothing; must still resolve ancestor keys
+
+        page = Grandchild(make_browser())
+        assert page.find_element_locators("state") == ("select", ("id", "state"))
+        assert page.find_element_locators("extra") == ("el", ("id", "extra"))
+
 
 class TestGetProxy:
     def test_typed_dispatch(self):
@@ -89,6 +97,26 @@ class TestGetProxy:
 
         assert isinstance(CustomPage(make_browser())["thing"], MyField)
 
+    def test_malformed_locator_missing_accessors_returns_nullfield(self):
+        class BadPage(Page):
+            elements = {"x": ("el",)}  # missing the accessors half
+
+        el = BadPage(make_browser())["x"]
+        assert isinstance(el, NullField)
+        assert not el
+
+    def test_malformed_accessors_arity_returns_nullfield(self):
+        class BadPage(Page):
+            elements = {"x": ("els", ("id",))}  # accessors not a (by, value) pair
+
+        assert isinstance(BadPage(make_browser())["x"], NullField)
+
+    def test_unknown_type_returns_nullfield(self):
+        class BadPage(Page):
+            elements = {"x": ("selct", ("id", "x"))}  # typo'd type string
+
+        assert isinstance(BadPage(make_browser())["x"], NullField)
+
 
 class TestVerify:
     def test_default_verify_is_true(self):