Unable to validate json schema using chakram-expectation.schema, for wrong schema method is returning true.

[Sumit-Soman]

Hi team, i am not able to validate my json with the provided schema. The method is returning true for any provided schema for my json. Kindly help
Below are the details:
raw json
{
"user_id": 954,
"first_name": "Claudia",
"last_name": "Hackbarth",
"user_role": "Alum",
"permission": {
"german_colleague": false,
"create_job": true,
"create_profiles": true,
"search_profile": false,
"admin": false
},
"status": {
"change_password": false
},
"exp": 1511265571,
"iss": "issuer_name",
"aud": "client"
}

schema
var expectedSchema={
properties: {
wrong_entity: {type: "integer"},
first_name: {type: 'number'},
last_name: {type: 'string'},
user_role: {type: 'string'},
permission: {
type: "object",
properties: {
german_colleague: {type: "boolean"},
create_job: {type: "boolean"},
create_profiles: {type: "boolean"},
search_profile: {type: "boolean"},
admin: {type: "boolean"}
}
},
status: {
type: "object",
properties: {
change_password: {type: "boolean"}
}
},
exp: {type: "integer"},
iss: {type: 'string'},
aud: {type: 'string'}
},
required: ["user_id"]
};

expect(response).to.have.schema(expectedSchema);

• for field "user_id" in json i have mentioned "wrong_entity" in my schema.
  For wrong schema above, method "chakram-expectation.schema" is returning true[unexpected]. Am I missing some config changes here.

[ADNolan]

Your schema is only checking that the user_id is present, which it is. The schema validation for tv4 is the same one postman uses and I have run into the same situation in the past. since wrong_entity is not required and not present, tv4 validator ignores that property. If that property was there, it would validate against your definition.