Add type name to error message

Replicates:
graphql/graphql-js@3f2dd27
graphql/graphql-js@1adfa77
graphql/graphql-js@b747bb4
graphql/graphql-js@0a731a5

Author: Cito

graphql/utilities/build_client_schema.py

@@ -104,13 +104,19 @@ def get_named_type(type_name: str) -> GraphQLNamedType:
     def get_input_type(type_ref: Dict) -> GraphQLInputType:
         input_type = get_type(type_ref)
         if not is_input_type(input_type):
-            raise TypeError("Introspection must provide input type for arguments.")
+            raise TypeError(
+                "Introspection must provide input type for arguments,"
+                f" but received: {inspect(input_type)}."
+            )
         return cast(GraphQLInputType, input_type)
 
     def get_output_type(type_ref: Dict) -> GraphQLOutputType:
         output_type = get_type(type_ref)
         if not is_output_type(output_type):
-            raise TypeError("Introspection must provide output type for fields.")
+            raise TypeError(
+                "Introspection must provide output type for fields,"
+                f" but received: {inspect(output_type)}."
+            )
         return cast(GraphQLOutputType, output_type)
 
     def get_object_type(type_ref: Dict) -> GraphQLObjectType:

tests/utilities/test_build_client_schema.py

@@ -598,7 +598,8 @@ def throws_when_output_type_is_used_as_an_arg_type():
 
             assert str(exc_info.value).startswith(
                 "Query fields cannot be resolved:"
-                " Introspection must provide input type for arguments."
+                " Introspection must provide input type for arguments,"
+                " but received: SomeUnion."
             )
 
         def throws_when_input_type_is_used_as_a_field_type():
@@ -617,7 +618,8 @@ def throws_when_input_type_is_used_as_a_field_type():
 
             assert str(exc_info.value).startswith(
                 "Query fields cannot be resolved:"
-                " Introspection must provide output type for fields."
+                " Introspection must provide output type for fields,"
+                " but received: SomeInputObject."
             )
 
         def throws_when_missing_possible_types():