more helpful messages for tests

Author: sydney-runkle

tests/validators/test_dataclasses.py

@@ -1597,6 +1597,11 @@ def _wrap_validator(cls, v, validator, info):
 init_test_cases = [
     ({'a': 'hello', 'b': 'bye'}, 'ignore', {'a': 'hello', 'b': 'HELLO'}),
     ({'a': 'hello'}, 'ignore', {'a': 'hello', 'b': 'HELLO'}),
+    # note, for the case below, we don't actually support this case in Pydantic
+    # it's disallowed in Pydantic to have a model with extra='allow' and a field
+    # with init=False, so this case isn't really possible at the momment
+    # however, no conflict arises here because we don't pass in the value for b
+    # to __init__
     ({'a': 'hello'}, 'allow', {'a': 'hello', 'b': 'HELLO'}),
     (
         {'a': 'hello', 'b': 'bye'},
@@ -1621,6 +1626,11 @@ def _wrap_validator(cls, v, validator, info):
     'input_value,extra_behavior,expected',
     [
         *init_test_cases,
+        # special case - when init=False, extra='allow', and the value is provided
+        # currently, it's disallowed in Pydantic to have a model with extra='allow'
+        # and a field with init=False, so this case isn't really possible at the momment
+        # TODO: open to changing this behavior, and changes won't be significantly breaking
+        # because we currently don't support this case
         ({'a': 'hello', 'b': 'bye'}, 'allow', {'a': 'hello', 'b': 'HELLO'}),
     ],
 )