Create Schema - test-schema.js

    const Joi = require('joi');

    const userSchema = Joi.object({
                name: Joi.string().required(),
                email: Joi.string().email().required(),
                password: Joi.string().min(6).required(),
                role: Joi.string().valid('ADMIN', 'USER').required()
    });

Add method - validateUser in test-schema.js

    async function validate(schema,user)
    {
       
        try
        {
            let result = await schema.validateAsync(user);
            console.log(result);
        }
        catch(error){
            let errorMessages = error.details.map(x=> ({ field: x.path[0], message: x.message}));       
            let message = { errors: errorMessages};     
            console.error(message);
        }
    }

    let userObj = { name:"Naresh", email:"n.com", password:"", role:"USER"};
    validateUser(userSchema,userObj);

Run the program

• node test-schema.js

    { errors: [ '"email" must be a valid email' ] }