nim-codex/tests/codex/helpers.nim

62 lines
1.4 KiB
Nim

import pkg/chronos
import pkg/libp2p
import pkg/libp2p/varint
import pkg/codex/blocktype as bt
import pkg/codex/stores
import pkg/codex/manifest
import pkg/codex/rng
import ./helpers/nodeutils
import ./helpers/randomchunker
import ./helpers/mockdiscovery
export randomchunker, nodeutils, mockdiscovery
# NOTE: The meaning of equality for blocks
# is changed here, because blocks are now `ref`
# types. This is only in tests!!!
func `==`*(a, b: bt.Block): bool =
(a.cid == b.cid) and (a.data == b. data)
proc lenPrefix*(msg: openArray[byte]): seq[byte] =
## Write `msg` with a varint-encoded length prefix
##
let vbytes = PB.toBytes(msg.len().uint64)
var buf = newSeqUninitialized[byte](msg.len() + vbytes.len)
buf[0..<vbytes.len] = vbytes.toOpenArray()
buf[vbytes.len..<buf.len] = msg
return buf
proc corruptBlocks*(
store: BlockStore,
manifest: Manifest,
blks, bytes: int): Future[seq[int]] {.async.} =
var pos: seq[int]
while true:
if pos.len >= blks:
break
var i = -1
if (i = Rng.instance.rand(manifest.len - 1); pos.find(i) >= 0):
continue
pos.add(i)
var
blk = (await store.getBlock(manifest[i])).tryGet()
bytePos: seq[int]
while true:
if bytePos.len > bytes:
break
var ii = -1
if (ii = Rng.instance.rand(blk.data.len - 1); bytePos.find(ii) >= 0):
continue
bytePos.add(ii)
blk.data[ii] = byte 0
return pos