fun constructorDoesNotAllowZeroValuesPerEntry() {
    assertFailsWith<IllegalArgumentException> {
      DiskLruCache(filesystem, cacheDir, appVersion, 0, 10, taskRunner)
    }
  }

  @Test
  fun removeAbsentElement() {
    cache.remove("a")
  }

  @Test
  fun readingTheSameStreamMultipleTimes() {
    set("a", "a", "b")
    val snapshot = cache["a"]!!