freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-javascript/6a0dcc730cb92a616f86f0c1.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
6a0dcc730cb92a616f86f0c1	Challenge 297: Schema Validator Part 3	28	challenge-297

--description--

Given an object (JavaScript) or dictionary (Python), determine if it matches the following schema:

Roles = "user" | "creator" | "moderator" | "staff" | "admin"

{
  username: string,
  posts: number,
  verified: boolean,
  role: Roles
}

• The pipe (|) symbol means "or". role must be one of the listed Roles values.
• Extra keys are allowed

--hints--

isValidSchema({ username: "henry", posts: 0, verified: true, role: "staff" }) should return true.

assert.isTrue(isValidSchema({ username: "henry", posts: 0, verified: true, role: "staff" }));

isValidSchema({ username: "sara", posts: 45, verified: false, role: "creator", followers: 70 }) should return true.

assert.isTrue(isValidSchema({ username: "sara", posts: 45, verified: false, role: "creator", followers: 70 }));

isValidSchema({ username: "penelope", posts: 20, verified: true, role: "admin" }) should return true.

assert.isTrue(isValidSchema({ username: "penelope", posts: 20, verified: true, role: "admin" }));

isValidSchema({ username: "kevin", posts: 0, verified: false, role: "user" }) should return true.

assert.isTrue(isValidSchema({ username: "kevin", posts: 0, verified: false, role: "user" }));

isValidSchema({ username: "george", posts: 15, verified: true, role: "moderator" }) should return true.

assert.isTrue(isValidSchema({ username: "george", posts: 15, verified: true, role: "moderator" }));

isValidSchema({ username: "david", posts: 0, verified: false, role: "guest" }) should return false.

assert.isFalse(isValidSchema({ username: "david", posts: 0, verified: false, role: "guest" }));

isValidSchema({ username: "wendy", posts: 10, verified: true }) should return false.

assert.isFalse(isValidSchema({ username: "wendy", posts: 10, verified: true }));

isValidSchema({ username: "fabian", posts: 1, verified: true, role: true }) should return false.

assert.isFalse(isValidSchema({ username: "fabian", posts: 1, verified: true, role: true }));

isValidSchema({ username: 8, posts: 1, verified: true, role: "user" }) should return false.

assert.isFalse(isValidSchema({ username: 8, posts: 1, verified: true, role: "user" }));

isValidSchema({ username: "penny", posts: "10", verified: true, role: "staff" }) should return false.

assert.isFalse(isValidSchema({ username: "penny", posts: "10", verified: true, role: "staff" }));

isValidSchema({ username: "john", posts: "1", verified: "true", role: "admin" }) should return false.

assert.isFalse(isValidSchema({ username: "john", posts: "1", verified: "true", role: "admin" }));

--seed--

--seed-contents--

function isValidSchema(obj) {

  return obj;
}

--solutions--

function isValidSchema(obj) {
  const roles = ["user", "creator", "moderator", "staff", "admin"];
  return (
    typeof obj.username === 'string' &&
    typeof obj.posts === 'number' &&
    typeof obj.verified === 'boolean' &&
    roles.includes(obj.role)
  );
}