// Trigger a job to trim the cache.
    cache.maxSize = 4
    taskFaker.runNextTask()
    assertAbsent("a")
    assertValue("b", "bb", "bb")
  }

  @Test
  fun restoreBackupFile() {
    val creator = cache.edit("k1")!!
    creator.setString(0, "ABC")
    creator.setString(1, "DE")
    creator.commit()
    cache.close()
    filesystem.atomicMove(journalFile, journalBkpFile)