set("b", "b", "b")
    }

    // Cause the rebuild action to fail.
    filesystem.setFaultyRename(cacheDir / DiskLruCache.JOURNAL_FILE_BACKUP, true)
    taskFaker.runNextTask()
    assertThat(cache.remove("a")).isTrue()
    assertAbsent("a")

    // Let the rebuild complete successfully.
    filesystem.setFaultyRename(cacheDir / DiskLruCache.JOURNAL_FILE_BACKUP, false)
    taskFaker.runNextTask()

    }
  }

  fun setFaultyDelete(
    file: Path,
    faulty: Boolean,
  ) {
    if (faulty) {
      deleteFaults.add(file)
    } else {
      deleteFaults.remove(file)
    }
  }

  fun setFaultyRename(
    file: Path,
    faulty: Boolean,
  ) {
    if (faulty) {
      renameFaults.add(file)
    } else {
      renameFaults.remove(file)
    }
  }

  @Throws(IOException::class)