Dependency injection into the Factory doesn't seem to work

[Pikachews]

Despite this line, when attempting to inject a service into a LoaderFactory, it does not appear to be successful.

When testing against my own application, it says that it cannot find the service despite it being part of the same module.

When testing by modifying Loader.test.ts, it appears to fail and simply be undefined:

import request from "supertest";
import Dataloader from "dataloader";
import { describe } from "vitest";
import { Controller, Get, Injectable } from "@nestjs/common";
import { NestExpressApplication } from "@nestjs/platform-express";
import { Test } from "@nestjs/testing";
import { DataloaderModule, DataloaderFactory, type LoaderFrom, Loader } from "@strv/nestjs-dataloader";

describe("@Loader()", (it) => {
  it("injects the dataloader instance into the request handler", async (t) => {
    @Injectable()
    class TestService {
      getHello() {
        return "Hello World!";
      }
    }

    @Injectable()
    class SampleLoaderFactory extends DataloaderFactory<unknown, unknown> {
      private testService: TestService;
      constructor(testService: TestService) {
        super();
        this.testService = testService;
      }

      load = async (keys: unknown[]) => {
        console.log(this.testService.getHello());
        return await Promise.resolve(keys);
      };
      id = (key: unknown) => key;
    }

    @Controller()
    class TestController {
      @Get("/")
      async handle(@Loader(SampleLoaderFactory) loader: LoaderFrom<SampleLoaderFactory>) {
        t.expect(loader).toBeInstanceOf(Dataloader);
        await loader.load("test");
      }
    }

    const module = await Test.createTestingModule({
      imports: [DataloaderModule.forRoot(), DataloaderModule.forFeature([SampleLoaderFactory])],
      providers: [TestService],
      controllers: [TestController],
      exports: [DataloaderModule, TestService],
    }).compile();
    const app = await module.createNestApplication<NestExpressApplication>().init();
    t.onTestFinished(async () => await app.close());

    await request(app.getHttpServer()).get("/");
  });
});

[Nest] 64194  - 10/30/2024, 6:27:50 PM   ERROR [ExceptionsHandler] Cannot read properties of undefined (reading 'getHello')
TypeError: Cannot read properties of undefined (reading 'getHello')
    at SampleLoaderFactory.load (nestjs-dataloader/test/Loader.test.ts:27:38)
    at SampleLoaderFactory.#load (nestjs-dataloader/src/Dataloader.factory.ts:61:32)
    at DataLoader._batchLoadFn (nestjs-dataloader/src/Dataloader.factory.ts:19:23)