Function failInTheMiddle

packages/effect/test/TArray.test.ts:1049–1050

(acc: number, n: number)

    Effect.gen(function*() {
      const n = 1_000
      const failInTheMiddle = (acc: number, n: number): STM.STM<number, string> =>
        acc === Math.floor(n / 2) ? STM.fail("boom") : STM.succeed(acc + n)
      const array = yield* (makeTArray(n, 1))
      const result = yield* (pipe(array, TArray.reduceSTM(0, failInTheMiddle), STM.either))
      assertLeft(result, "boom")