fun cannotOperateOnEditAfterPublish() {
    val editor = cache.edit("k1")!!
    editor.setString(0, "A")
    editor.setString(1, "B")
    editor.commit()
    editor.assertInoperable()
  }

  @Test
  fun cannotOperateOnEditAfterRevert() {
    val editor = cache.edit("k1")!!
    editor.setString(0, "A")
    editor.setString(1, "B")
    editor.abort()
    editor.assertInoperable()
  }

  @Test