GET /customer

test.js

//status code is 200
pm.test("Status code is 200", function () {
    pm.response.to.have.status(200);
});

//reponse body is json()
pm.test("Response body should be  json",function(){
    pm.response.to.have.jsonBody();
})

var body = pm.response.json();

var id = pm.environment.get("CUSTOMER_ID");
var email = pm.environment.get("CUSTOMER_EMAIL");
var firstName = pm.environment.get("CUSTOMER_FIRST_NAME");
var lastName = pm.environment.get("CUSTOMER_LAST_NAME");

var schema = {
    type: "object",
    properties: {
      id: {
        type: "integer",
        minimum: id,
        maximum: id
      },
      createdDate: {
        type: "string"
      },
      firstName: {
        type: "string",
        pattern: firstName
      },
      lastname: {
        type: "string",
        pattern: lastName
      },
      email: {
        type: "string",
        pattern: email
      }
    }
  };

pm.test("Schema and values are valid ",function(){
    pm.expect(tv4.validate(body, schema)).to.be.true;
});