UserFactory.ts

export interface User {
    name: String,
    password: String
}

const random = (): number => {
    return Math.floor(Math.random() * Math.floor(10000000));
};

export const buildDefaultUser = (partial: Partial<User>): User => {
    return {
        name: 'some-username-' + random(),
        password: 'some-password-' + random(),
        ...partial
    }
};