multi-generate.md

Generating multiple fixtures

In a previous guide we learned how to create a Spec and generate a fixture. In this guide, we'll learn how we can easily generate many fixtures!

In the example below, myDanosawur is a single object containing our fixture data.

const Dinosaur = createSpec({
  id: faker.datatype.number(),
  name: faker.name.firstName(),
  location: faker.address.country(),
});

const myDanosawur = Dinosaur.generate();
// {
//   id: 1231,
//   name: 'Alice',
//   location: 'Canada'
// }

To generate multiple fixtures, simply pass the number you want generated into the .generate() method.

const Dinosaur = createSpec({
  id: faker.datatype.number(),
  name: faker.name.firstName(),
  location: faker.address.country(),
});

const myDanosawurs = Dinosaur.generate(2);
// [
//   { id: 55079, name: 'Antone', location: 'Pitcairn Islands' },
//   { id: 83994, name: 'Eileen', location: 'Brazil' }
// ]

Bam! Multiple Danosawurs! If a number is passed into .generate(), it will return an array of fixtures instead of a single fixture object.

Generating a random amount of fixtures

You can also generate an array containing a random amount of fixtures between two numbers by passing in two arguments to .generate(): count and maxCount.

In the example below, we're going to be generating anywhere between 1 to 5 Danosawurs.

Dinosaur.generate(1, 5);
// [
//   { id: 76619, name: 'Tess', location: 'Jordan' },
//   { id: 60633, name: 'Madeline', location: 'Uzbekistan' },
//   { id: 5002, name: 'Crawford', location: 'Armenia' }
// ]

Up next

Learn how to Specs within Specs by nesting.