Function sumEffect

packages/effect/test/Effect/sync.test.ts:33–38

(n: number)

  it.effect("sync - effect", () =>
    Effect.gen(function*() {
      const sumEffect = (n: number): Effect.Effect<number, unknown> => {
        if (n < 0) {
          return Effect.sync(() => 0)
        }
        return pipe(Effect.sync(() => n), Effect.flatMap((b) => pipe(sumEffect(n - 1), Effect.map((a) => a + b))))
      }
      const result = yield* (sumEffect(1000))
      strictEqual(result, sum(1000))
    }))