How to prevent error "No provider for xxx! - in Module "xxx" (Operation Scope)" when adding new provider

[alexxiyang]

Recently our project team met an issue.

Scenario

There are 2 modules ModuleA and ModuleB.

• ModuleA has a provider ProviderFoo. ProviderFoo uses RESTDataSourceA which is also a provider
• ModuleB has a provider ProviderBar which uses ProviderFoo of ModuleA
  The design looks like below
  

Recently, we add a new RESTDataSourceB. ProviderFoo uses RESTDataSourceB as well. But we forgot to register the RESTDataSourceB in ModuleB. Then we got this error No provider for RESTDataSourceB! - in Module "ModuleB" (Operation Scope)

Because we can't prevent engineers from making similar mistakes when adding a new Provider. QA will only test ModuleA if this change is made for ModuleA. How to prevent the same issue happen again?

The solution I can think about is create a allProviders.ts. Include all the providers in this file like

import ProviderFoo from '../../ProviderFoo';
import ProviderBar from '../../ProviderBar';
import ProviderBaz from '../../ProviderBaz';

export const allProviders = [ProviderFoo, ProviderBar, ProviderBaz];

But it's an ugly solution. Is there any better solution can fix this issue?

[alexxiyang]

Can anyone help us?