describe("About Prototypal Inheritance (topics/13_about_prototypal_inheritance.js)", function () {

class User {

constructor(name, password) {

this.name = name;

this.password = password;

}

greet() {

return "Hello, my name is " + this.name;

}

}

class Administrator extends User {

constructor(name, password) {

super(name, password);

}

greet() {

return super.greet() + " and I'm an admin";

}

static role = "Admin";

}

const eric = new User("Eric", "password");

const john = new Administrator("John", "hardpassword");

it("defining a 'User' class", function () {

expect(__).toBe(eric.greet(), "what will Eric say?");

});

it("can change a user's password", function () {

// missing function 'changePassword' in User class!

eric.changePassword("ericPass");

expect(eric.password).toBe(

"ericPass",

"did you implement 'changePassword' method?"

);

});

it("Administrator Inherits the User class", function () {

expect(__).toBe(eric instanceof User);

expect(__).toBe(eric instanceof Administrator);

expect(__).toBe(john instanceof User);

expect(__).toBe(john instanceof Administrator);

});

it("`greet` is polymorphic", function () {

expect(__).toBe(john.greet(), "what will John say?");

});

it('a class can have a "shared" field', function () {

expect("Admin").toBe(__, "What do all Administrators have in common?");

});

it('a class can have a "shared" method', function () {

expect("Administrating...").toBe(

Administrator.__,

"https://developer.mozilla.org/es/docs/Web/JavaScript/Referencia/Classes/static"

);

});

});