Add test to confirm default_value setting

graphene/types/tests/test_inputfield.py

@@ -1,7 +1,12 @@
 from functools import partial
 
 from ..inputfield import InputField
+from ..inputobjecttype import InputObjectType
+from ..scalars import String, Boolean
+from ..objecttype import ObjectType
 from ..structures import NonNull
+from ..schema import Schema
+from ..mutation import Mutation
 from .utils import MyLazyType
 
 
@@ -27,3 +32,36 @@ def test_inputfield_with_lazy_partial_type():
 def test_inputfield_with_string_type():
     field = InputField("graphene.types.tests.utils.MyLazyType")
     assert field.type == MyLazyType
+
+
+def test_inputfield_with_default_value():
+    class MyInput(InputObjectType):
+        name = InputField(String, default_value="Emma", required=True)
+        good_person = InputField(Boolean, default_value=True, required=True)
+
+    class Query(ObjectType):
+        a = String()
+
+    class TestMutation(Mutation):
+        class Arguments:
+            my_field = MyInput(required=True)
+
+        Output = Boolean
+
+        def mutate(root, info, my_field):
+            return my_field.good_person
+
+    class MyMutation(ObjectType):
+        test_mutation = TestMutation.Field(required=True)
+
+    schema = Schema(query=Query, mutation=MyMutation)
+    result = schema.execute(
+        """
+        mutation {
+            testMutation(myField: {})
+        }
+        """
+    )
+
+    assert not result.errors
+    assert result.data == {"testMutation": True}