All defaults from all OneOf schema options get propagated using the DefaultJSONValidator

[nielsbox]

Description

When using the DefaultJSONValidator which propagates all defaults to the payload does not take account of the OneOf branches.

oneOf:
  - type: object
     properties:
        foo:
            type: string
            default: "bar"
  - type: object
     properties:
        xyz:
           type: string

Expected behaviour

When providing
{
"xyz": "abc"
}
No default should be propagated due to the oneOf nature

Actual behaviour

{
"xyz": "abc",
"foo": "bar"
}

This is invalid within the contract as it can only be oneOf and not both.

Steps to reproduce

Use the Default JSON Validator with the provided schema.

Additional info:

Output of the commands:

• python --version -> 3.10
• pip show connexion | grep "^Version\:" -> 3.0.5