Use factory without starting Mirage server

[lanhhv84]

Firstly, thanks for creating this excellent library. This helps me a lot!

Currently, Miragejs works excellently when it comes to testing React components that interact with external APIs.
My setup follows the doc about Factories.

• (1) Start Mirage server
• (2) Create test data
• (3) Render the target component, set some expectations
• (4) Shutdown Mirage server

But sometimes, I also need to test stateless components by passing data directly as props. In those cases, I think it could be great if I could use Factories to create test data without steps (1) and (4).

Currently, I can do this:

const Factory = MyFactory.extend(mergedExtensions); // (1)
let factory = new Factory(); // (2)
return factory.build(sequence); // (3) -> sequence is managed by the test case

But there are some small issues:

• Typescript issues:
  • new Factory() -> There is no constructor
  • factory.build(sequence) -> There is no build function exported
• Code boilerplate. Ideally, I think we should be able to do this:
  • MyFactory.extend(mergedExtensions).build()
    • To achieve this, I think we can add build to the Factory type, and use/store sequence internally if the external sequence is not provided.

I am happy to create an MR for this suggestion if you don't mind!