nimbus-eth1/fluffy/tests/test_content_db.nim

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# Nimbus
# Copyright (c) 2021 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
{.used.}
import
unittest2, stint,
eth/keys,
../network/state/state_content,
../content_db,
./test_helpers
proc generateNRandomU256(rng: var HmacDrbgContext, n: int): seq[UInt256] =
var i = 0
var res = newSeq[UInt256]()
while i < n:
let bytes = rng.generateBytes(32)
let num = UInt256.fromBytesBE(bytes)
res.add(num)
inc i
return res
suite "Content Database":
let rng = newRng()
let testId = u256(0)
# Note: We are currently not really testing something new here just basic
# underlying kvstore.
test "ContentDB basic API":
let
db = ContentDB.new("", uint32.high, inMemory = true)
key = ContentId(UInt256.high()) # Some key
block:
let val = db.get(key)
check:
val.isNone()
db.contains(key) == false
block:
discard db.put(key, [byte 0, 1, 2, 3], testId)
let val = db.get(key)
check:
val.isSome()
val.get() == [byte 0, 1, 2, 3]
db.contains(key) == true
block:
db.del(key)
let val = db.get(key)
check:
val.isNone()
db.contains(key) == false
test "ContentDB size":
let
db = ContentDB.new("", uint32.high, inMemory = true)
let numBytes = 10000
let size1 = db.size()
discard db.put(u256(1), genByteSeq(numBytes), testId)
let size2 = db.size()
discard db.put(u256(2), genByteSeq(numBytes), testId)
let size3 = db.size()
discard db.put(u256(2), genByteSeq(numBytes), testId)
let size4 = db.size()
let realSize = db.realSize()
check:
size2 > size1
size3 > size2
size3 == size4
realSize == size4
db.del(u256(2))
db.del(u256(1))
let realSize1 = db.realSize()
let size5 = db.size()
check:
size4 == size5
# real size will be smaller as after del, there are free pages in sqlite
# which can be re-used for further additions
realSize1 < size5
db.reclaimSpace()
let size6 = db.size()
let realSize2 = db.realSize()
check:
# After space reclamation size of db should be equal to initial size
size6 == size1
realSize2 == size6
test "ContentDB pruning":
let
maxDbSize = uint32(100000)
db = ContentDB.new("", maxDbSize, inMemory = true)
let furthestElement = u256(40)
let secondFurthest = u256(30)
let thirdFurthest = u256(20)
let numBytes = 10000
let pr1 = db.put(u256(1), genByteSeq(numBytes), u256(0))
let pr2 = db.put(thirdFurthest, genByteSeq(numBytes), u256(0))
let pr3 = db.put(u256(3), genByteSeq(numBytes), u256(0))
let pr4 = db.put(u256(10), genByteSeq(numBytes), u256(0))
let pr5 = db.put(u256(5), genByteSeq(numBytes), u256(0))
let pr6 = db.put(u256(10), genByteSeq(numBytes), u256(0))
let pr7 = db.put(furthestElement, genByteSeq(numBytes), u256(0))
let pr8 = db.put(secondFurthest, genByteSeq(numBytes), u256(0))
let pr9 = db.put(u256(2), genByteSeq(numBytes), u256(0))
let pr10 = db.put(u256(4), genByteSeq(numBytes), u256(0))
check:
pr1.kind == ContentStored
pr2.kind == ContentStored
pr3.kind == ContentStored
pr4.kind == ContentStored
pr5.kind == ContentStored
pr6.kind == ContentStored
pr7.kind == ContentStored
pr8.kind == ContentStored
pr9.kind == ContentStored
pr10.kind == DbPruned
check:
2022-05-17 10:47:24 +00:00
pr10.numOfDeletedElements == 2
uint32(db.realSize()) < maxDbSize
# With current settings 2 furthers elements will be delted i.e 30 and 40
# so the furthest non deleted one will be 20
pr10.furthestStoredElementDistance == thirdFurthest
db.get(furthestElement).isNone()
db.get(secondFurthest).isNone()
db.get(thirdFurthest).isSome()