DataMocka

DataMocka is a lightweight, flexible, and easy-to-use TypeScript library for generating realistic mock data for testing and development purposes. It comes with a variety of predefined templates for common data types, such as names, addresses, emails, and phone numbers, and also supports custom templates for more specialized use cases.

Features

• Predefined templates for common data types
• Customizable templates for specific needs
• Flexible and easy-to-use API

Installation

Install with npm

npm install @rexysaur/DataMocka --save-dev

Documentation

Generating User Information (typescript)

Getting a random first name

import dm from "@rexysaur/DataMocka";

(async () => {
  const randomFirstName = await dm.firstName()(); // dm.firstName() returns a function that needs to be executed
  console.log(randomFirstName); // e.g Hayden
})();

Getting a random last name name

import dm from "@rexysaur/DataMocka";

(async () => {
  const randomLastName = await dm.lastName()(); // dm.lastName() returns a function that needs to be executed
  console.log(randomLastName); // e.g Stein
})();

Getting a random email

import dm from "@rexysaur/DataMocka";

(async () => {
  const randomEmail = await dm.email()(); // dm.email() returns a function that needs to be executed
  console.log(randomEmail); // e.g [email protected]
})();

Generating bulk users

import dm from "@rexysaur/DataMocka";

type UserStructure = {
  firstName: string;
  email: string;
};

(async () => {
  const users = await dm.generate<UserStructure>({
    count: 2, // Number of users to generate
    template: {
      // the format of the user. This should relate to the Generic passed into the function

      // Properties of each user
      firstName: dm.firstName(),
      email: dm.email(),
    },
  });

  console.log(users);
  //
  // [
  //    { firstName: 'Keira', email: '[email protected]' },
  //    { firstName: 'Izabella', email: '[email protected]' }
  // ]
  //
})();

Creating your own generator

import dm from "@rexysaur/DataMocka";

type UserStructure = {
  firstName: string;
  email: string;
  favouriteColour: string;
};

(async () => {
  const users = await dm.generate<UserStructure>({
    count: 2, // Number of users to generate
    template: {
      // the format of the user. This should relate to the Generic passed into the function

      // Properties of each user
      firstName: dm.firstName(),
      email: dm.email(),
      favouriteColour: dm.custom(() =>
        dm.util.pickRandom(["red", "green", "blue", "yellow"])
      ), // Custom generator function
      // Picks a random element from the array
    },
  });

  console.log(users);
})();

Utilities

DataMocka provides a few utility functions that could be helpful where creating generator templates

pickRandom

pickRandom chooses and returns a random element of an array

pickRandom(["blue", "yellow", "red", "green"]); // e.g yellow
pickRandom(["blue", "yellow", "red", "green"]); // e.g red

getRandomInt

getRandomInt is just an extension of the Math.random function that allows a minimum, and a maximum value to be provided. The maximum value is non-inclusive.

getRandomInt(10, 20); // Any number between 10 and 19

generateRandomDigits

generates random digits with a certain final length

generateRandomDigits(1); // 6
generateRandomDigits(5); // 49525
generateRandomDigits(10); // 2059284363