Event handler not working in the unit test? about cqrs HOT 9 CLOSED

@bratello @zveljkovic had a similar issue, which was fixed by calling await module.init() after building the testing module.

from cqrs.

@DanielMenke Sure thing, however, my use case doesn't override providers. Hope it helps nonetheless:

In beforeAll()

        ...
        this.testingModule = await Test.createTestingModule({
            providers: [
               // only needed providers
            ],
            imports: [
                ConfigurationModule,
                ConfigModule.forRoot({
                    validate: EnvironmentVariables.validate,
                    isGlobal: true
                }),
                EventEmitterModule.forRoot(),
                // other imports
            ]
        }).compile();

        await this.testingModule.init();
        ...

from cqrs.

@andynunes Thanks!
The problem was that I put EventEmitter2 in the providers AND imported the EventEmitterModule.forRoot(). Only the latter is necessary and gets overridden with an EventEmitter2-instance without any registered listeners as soon as I put the EventEmitter2 inside the providers.

from cqrs.

Could you please provide a minimal repository which reproduces your issue?:)

from cqrs.

@murbanowicz Did you resolve this issue? I have the same problem, from tests, my event handlers are not triggered...

from cqrs.

@murbanowicz Did you resolve this issue? I have the same problem, from tests, my event handlers are not triggered...

Same issue. Did you get some progress? First I decided that some problem happens with async events. I checked with simple sync event - no matter sync or async, they are all seems to be ASSync.

from cqrs.

@bratello @zveljkovic had a similar issue, which was fixed by calling await module.init() after building the testing module.

Thank you for sharing @andrepav1 - this also fixed a similar issue for me but using the @nestjs/event-emitter package.

from cqrs.

@andynunes could you provide a working example? I am also having this problem with the @nestjs/event-emitter package. It is working fine if I create the complete AppModule as TestModule but fails if I only build a subset of its modules.

this works:

const moduleFixture: TestingModule = await Test.createTestingModule({
      imports: [AppModule],
    }).compile();

    app = moduleFixture.createNestApplication();
    await app.init();

this does not:

 const module: TestingModule = await Test.createTestingModule({
      imports: [EventEmitterModule.forRoot()],
      providers: [RecipesService, PrismaService, EventEmitter2],
    })
      .overrideProvider(PrismaService)
      .useValue(mockDeep<PrismaClient>())
      .compile();

    await module.createNestApplication();
    await module.init();

from cqrs.

@DanielMenke Nice, glad to hear you found the issue!

from cqrs.