How can I stub response including nil value?

[dtan4]

Hello,

I'm developing a tool using aws-sdk gem v2, and implmenting tests with stubbed API requests.

I'd like to stub response including nil value, like this:

client = Aws::RDS::Client.new

client.describe_db_parameters(db_parameter_group_name: "hoge").parameters[2]
=> #<struct
 parameter_name="archive_timeout",
 parameter_value="300",
 description= "Timeout seconds for archiving",
 source="system",
 apply_type="dynamic",
 data_type="integer",
 allowed_values="0-2147483647",
 is_modifiable=false,
 minimum_engine_version=nil,
 apply_method=nil>

However, the actual stubbed response is this:

client = Aws::RDS::Client.new(stub_responses: true)
db_parameters = [
  {
    parameter_name: "archive_timeout",
    parameter_value: "300",
    description: "Timeout seconds for archiving",
    source: "system",
    apply_type: "dynamic",
    data_type: "integer",
    allowed_values: "0-214748364",
    is_modifiable: false,
    minimum_engine_version: nil,
    apply_method: nil
  }
]
client.stub_responses(:describe_db_parameters, db_parameters)

client.describe_db_parameters(db_parameter_group_name: "hoge").parameters[0]
=> #<struct
 parameter_name="archive_timeout",
 parameter_value="300",
 description="Timeout seconds for archiving",
 source="system",
 apply_type="dynamic",
 data_type="integer",
 allowed_values="0-214748364",
 is_modifiable=false,
 minimum_engine_version="String",
 apply_method="ApplyMethod">

nil value is converted to another default value by #stub_scalar method.

Is there any way to stub nil-included response?
Thanks.

[trevorrowe]

It looks like this is a deficiency of the current implementation. I look into a patch so that explicitly given nil values are preserved.

[trevorrowe]

The fix above should got out with the next release. Thanks for reporting the issue!

[dtan4]

Thanks for quick resolving 👍 ❗