NestJS testing controller can't resolve connection dependency - testing

Question

I wrote a test for a NestJS Controller that was working somehow, but now I get this error:
describe('ModalityController', () => {
let controller: ModalityController;
let modalitiesFactory: Modality[];
const mockService = {
getAll: jest.fn(),
createOne: jest.fn(),
updateOne: jest.fn(),
};
beforeAll(async (done) => {
await useSeeding();
modalitiesFactory = await factory(Modality)().makeMany(10);
done();
});
beforeEach(async () => {
const module: TestingModule = await Test.createTestingModule({
controllers: [ModalityController],
providers: [
{
provide: 'Connection',
useValue: {},
},
{
provide: ModalityService,
useValue: mockService,
},
],
}).compile();
controller = module.get<ModalityController>(ModalityController);
});
it('should be defined', () => {
expect(controller).toBeDefined();
});
});
I get this error:
ModalityController
× should be defined (21 ms)
● ModalityController › should be defined
Nest can't resolve dependencies of the de8e6b44-c5c0-4633-b3b4-638e9df1b2a3 (?). Please make sure that the argument Connection at index [0] is available in the RootTestModule context.
Potential solutions:
- If Connection is a provider, is it part of the current RootTestModule?
- If Connection is exported from a separate #Module, is that module imported within RootTestModule?
#Module({
imports: [ /* the Module containing Connection */ ]
})
at Injector.lookupComponentInParentModules (../node_modules/#nestjs/core/injector/injector.js:193:19)
at Injector.resolveComponentInstance (../node_modules/#nestjs/core/injector/injector.js:149:33)
at resolveParam (../node_modules/#nestjs/core/injector/injector.js:103:38)
at async Promise.all (index 0)
at Injector.resolveConstructorParams (../node_modules/#nestjs/core/injector/injector.js:118:27)
at Injector.loadInstance (../node_modules/#nestjs/core/injector/injector.js:47:9)
at Injector.loadInjectable (../node_modules/#nestjs/core/injector/injector.js:65:9)
at async Promise.all (index 2)
at InstanceLoader.createInstancesOfInjectables (../node_modules/#nestjs/core/injector/instance-loader.js:62:9)
at ../node_modules/#nestjs/core/injector/instance-loader.js:30:13
● ModalityController › should be defined
expect(received).toBeDefined()
Received: undefined
46 |
47 | it('should be defined', () => {
> 48 | expect(controller).toBeDefined();
| ^
49 | });
50 |
51 | /*
at Object.<anonymous> (modality/modality.controller.spec.ts:48:24)
Test Suites: 1 failed, 1 total
Tests: 1 failed, 1 total
Snapshots: 0 total
Time: 5.604 s
I also tried to load the Modality Service and then provide a mock of the Modality Repository:
providers: [
ModalityService,
{
provide: getRepositoryToken(Modality),
useValue: mockRepository,
},
],
But no luck. I don't know how to provide a mocking connection object. What part of the controller is requiring the connection if this is the service job?
Help me guys. What can you see?
EDIT: Adding the controller code:
#ApiTags('Modalidad')
#Controller('modality')
export class ModalityController {
constructor(private modalityService: ModalityService) {}
#ApiOperation({
summary: 'Lista de todas las modalidades, paginados',
})
#OpenApiPaginationResponse(UpdateModalityDto)
#SkipJwtAuth()
#Get()
index(#Query() { items_per_page, page }: PaginationDto) {
return this.modalityService.getAll({
items_per_page: items_per_page || 10,
page: page || 0,
sortOrder: 'ASC',
});
}
#ApiOperation({
summary: 'obtiene una modalidad a partir de una id',
})
#ApiParam({
name: 'id',
type: Number,
})
#SkipJwtAuth()
#OpenApiTransformResponse(UpdateModalityDto)
#UseInterceptors(TransformInterceptor)
#Get(':id')
getOne(#Param('id', ParseIntPipe, EntityPipe()) modality: Modality) {
return modality;
}
#ApiOperation({
summary: 'Crear una nueva modalidad',
})
#SkipJwtAuth()
#OpenApiTransformResponse(UpdateModalityDto, 201)
#UseInterceptors(TransformInterceptor)
#Post()
async store(#Body() modality: CreateModalityDto) {
return await this.modalityService.createOne(modality);
}
#ApiOperation({
summary: 'actualizar una modalidad que ya existe',
})
#ApiParam({
name: 'id',
type: Number,
})
#SkipJwtAuth()
#OpenApiTransformResponse(UpdateModalityDto)
#UseInterceptors(TransformInterceptor)
#InjectItemToBody({ property: 'id' })
#Put(':id')
async update(
#Param('id', ParseIntPipe, EntityPipe()) modality: Modality,
#Body() updatedModality: UpdateModalityDto,
) {
return await this.modalityService.updateOne(modality, updatedModality);
}
}
SOLVED
The problem was that was not detecting the 'Connection' as a valid value. i've change it to the Connection object from the typeorm package