Node Factory

A package for creating test data or for generating fixtures.

Table of Contents

• Examples
  • Defining factories
  • Creating documents
• API
  • define
  • get
  • build
  • tree
  • create
  • extend
• Other

Examples

Defining factories

import Factory from 'factory';

const factory = new Factory();

// Reference to mongo collections. Depending on how you interface with mongo
// getting these references will vary. The important part is that the collection
// should have the async functions `insert` and `findOne`.
const { authors, books } = db;

factory.define('author', authors, {
  name: 'John Smith'
}).after(author => {
  // Do something smart
});

factory.define('book', books, {
  authorId: factory.get('author'),
  name: 'A book',
  year() { return _.random(1900, 2014); }
});

// We can also extend from an existing factory
factory.define('anotherBook', books, factory.extend('book', {
  // ...
}));

Creating documents

// Ex. 1: Inserts a new book into the books collection
const book = factory.create('book');

// Ex. 2: New fields can be added or overwritten
const book = factory.create('book', { name: 'A better book' });

API

Note: When calling factory.create('book') both the Book and an Author are created. The newly created Author _id will then be automatically assigned to that field. In the case of calling factory.build('book') as no insert operations are run, the _id will be faked.

define

factory.define('name', Collection, doc).after(doc => { ... })

• name
  • A name for this factory
• Collection
  • A mongo collection
• doc
  • Document object
• .after hook (Optional)
  • Returns the newly inserted document after calling factory.create

get

factory.get('name')

Returns the instance of name. Typical usage is to specify a relationship between collections as seen in the Book example above.

build

factory.build('name', doc)

Builds the data structure for this factory

• name
  • The name defined for this factory
• doc (Optional)
  • Document object

tree

factory.tree('name', doc)

Builds an object tree without _id fields. Useful for generating data for templates.

• name
  • The name define for this factory
• doc (Optional)
  • Document object

Example:

  factory.define('author', authors, {
    name: "John Smith"
  });

  factory.define('book', books, {
    name: "A book",
    author: factory.get('author')
  });

  const book = factory.tree('book');

book then equals:

{
  name: 'A book',
  author: {
    name: 'John Smith'
  }
}

create

factory.create('name', doc)

Creates (inserts) this factory into mongodb

• name
  • The name defined for this factory
• doc (Optional)
  • Document object

extend

factory.extend('name', doc)

Extend from an existing factory

• name
  • The name defined for this factory
• doc (Optional)
  • Document object

License

MIT.

Node Factory is based on https://github.com/versolearning/meteor-factory MIT. (c) Percolate Studio