// CREATE / INSERT
    val srs1 = (1 to 10) map { i => SimpleRoot(i = i) }
    val uris = await(repository.insert(srs1))

    locally {
      val h1s = getHistories(srs1)
      h1s.size mustBe srs1.size
      for ((h1, sr1) <- h1s zip srs1) {
        h1.snapshots.size mustBe 1
        h1.snapshots(0).action mustBe "INSERT"
        h1.snapshots(0).value.i mustBe sr1.i
      }
    }

    // READ / FIND
    val srs2 = await(repository.find(uris))

    // UPDATE
    srs2 foreach { _.i *= 10 }
    await(repository.update(srs2))

    locally {
      val h2s = getHistories(srs2)
      h2s.size mustBe srs2.size
      for (((h2, sr1), sr2) <- h2s zip srs1 zip srs2) {
        println(h2.snapshots.size, 2, h2.snapshots.size == 2, h2.snapshots.size mustBe 2)

        h2.snapshots.size mustBe 2
        h2.snapshots(0).action mustBe "INSERT"
        h2.snapshots(0).value.i mustBe sr1.i
        h2.snapshots(1).action mustBe "UPDATE"
        h2.snapshots(1).value.i mustBe sr2.i
      }
    }

    // DELETE
    val srs3 = await(repository.find(uris))
    await(repository.delete(srs3))

    locally {
      val h2s = getHistories(srs3)
      h2s.size mustBe srs3.size
      for ((((h3, sr1), sr2), sr3) <- h2s zip srs1 zip srs2 zip srs3) {
        h3.snapshots.size mustBe 3
        h3.snapshots(0).action mustBe "INSERT"
        h3.snapshots(0).value.i mustBe sr1.i
        h3.snapshots(1).action mustBe "UPDATE"
        h3.snapshots(1).value.i mustBe sr2.i
        h3.snapshots(2).action mustBe "DELETE"
        h3.snapshots(2).value.i mustBe sr3.i
      }
    }