Testing singletons

I’m writing tests against a class marked @singleton(). In my beforeEach I resolve the class, but since it’s a singleton I get the same instance for each test. Ideally each test would be independent of the others. I tried calling container.reset() but that wipes out all of the registered types. Is there room in this library for a “soft” reset, or is there another approach I could take?

[fabiopigna]

Hello, I’ve the same problem. There is a way to reset only the instances of registered singletons?

[skiptirengu]

Just a heads up. You can do this cleanly with the new ContainerScoped lifecycle introduced on version 4. ContainerScoped behaves pretty much like a singleton, except the cached instance is reset for every new child container created.

import { Lifecycle, scoped, container as globalContainer, DependencyContainer } from 'tsyringe'

@scoped(Lifecycle.ContainerScoped)
class MyService {
  // ...
}

describe('My test', () => {
  let container: DependencyContainer

  beforeEach(function () => {
    container = globalContainer.createChildContainer()
  })

  it('New MyService instance', () => {
    const instance = container.resolve(MyService)
    // ...
  })
})