Add test for input object type in build_ast_schema

Author: mwilliamson

graphql/utils/tests/test_build_ast_schema.py

@@ -1,6 +1,6 @@
 from pytest import raises
 
-from graphql import parse
+from graphql import GraphQLInt, parse
 from graphql.utils.build_ast_schema import build_ast_schema
 from graphql.utils.schema_printer import print_schema
 
@@ -392,6 +392,25 @@ def test_input_object():
     assert output == body
 
 
+def test_input_types_are_read():
+    schema = build_ast_schema(parse("""
+        schema {
+            query: Query
+        }
+
+        type Query {
+            field(input: Input): Int
+        }
+
+        input Input {
+            id: Int
+        }
+    """))
+
+    input_type = schema.get_type("Input")
+    assert input_type.fields["id"].type == GraphQLInt
+
+
 def test_simple_argument_field_with_default():
     body = '''
 schema {