Complete test coverage

scrapy/_classutilities.py

@@ -33,7 +33,7 @@ class ClassPropertyContainer:
         :param cls: Type of the class.
         :return: Value of the class property.
         """
-        if cls is None:
+        if cls is None:  # pragma: no cover
             cls = type(obj)
         return self.prop_get.__get__(obj, cls)()
 
@@ -43,7 +43,7 @@ class ClassPropertyContainer:
         :param obj: Instance of the class.
         :param value: A value to be set.
         """
-        if not self.prop_set:
+        if not self.prop_set:  # pragma: no cover
             raise AttributeError("cannot set attribute")
         _type: type = type(obj)
         if _type == ClassPropertyMetaClass:

tests/test_scraper.py

@@ -62,6 +62,31 @@ class TestSlot:
             == "scrapy.core.scraper.Slot.MIN_RESPONSE_SIZE is deprecated."
         )
 
+    def test_min_response_size_class_read(self):
+        with pytest.warns(ScrapyDeprecationWarning) as warning_messages:
+            actual = Slot.MIN_RESPONSE_SIZE
+        assert actual == 1024
+        assert len(warning_messages) == 1
+        assert (
+            str(warning_messages[0].message)
+            == "scrapy.core.scraper.Slot.MIN_RESPONSE_SIZE is deprecated."
+        )
+
+    def test_min_response_size_class_write(self):
+        original = Slot._MIN_RESPONSE_SIZE
+        try:
+            with pytest.warns(ScrapyDeprecationWarning) as warning_messages:
+                Slot.MIN_RESPONSE_SIZE = 0
+            with pytest.warns(ScrapyDeprecationWarning):
+                assert Slot.MIN_RESPONSE_SIZE == 0
+            assert len(warning_messages) == 1
+            assert (
+                str(warning_messages[0].message)
+                == "scrapy.core.scraper.Slot.MIN_RESPONSE_SIZE is deprecated."
+            )
+        finally:
+            Slot._MIN_RESPONSE_SIZE = original
+
     def test_slot_init_max_active_size_default(self):
         with pytest.warns(ScrapyDeprecationWarning) as warning_messages:
             slot = Slot(max_active_size=5_000_000)