}
  }

  @Test
  fun keyWithNewlineNotPermitted() {
    assertFailsWith<IllegalArgumentException> {
      cache.edit("my\nkey")
    }
  }

  @Test
  fun keyWithCarriageReturnNotPermitted() {
    assertFailsWith<IllegalArgumentException> {
      cache.edit("my\rkey")
    }
  }

  @Test
  fun createNewEntryWithTooFewValuesFails() {
    val creator = cache.edit("k1")!!