nimbus-eth1/tests/test_memory.nim
Jordan Hrycaj c47f021596
Core db and aristo updates for destructor and tx logic (#1894)
* Disable `TransactionID` related functions from `state_db.nim`

why:
  Functions `getCommittedStorage()` and `updateOriginalRoot()` from
  the `state_db` module are nowhere used. The emulation of a legacy
  `TransactionID` type functionality is administratively expensive to
  provide by `Aristo` (the legacy DB version is only partially
  implemented, anyway).

  As there is no other place where `TransactionID`s are used, they will
  not be provided by the `Aristo` variant of the `CoreDb`. For the
  legacy DB API, nothing will change.

* Fix copyright headers in source code

* Get rid of compiler warning

* Update Aristo code, remove unused `merge()` variant, export `hashify()`

why:
  Adapt to upcoming `CoreDb` wrapper

* Remove synced tx feature from `Aristo`

why:
+ This feature allowed to synchronise transaction methods like begin,
  commit, and rollback for a group of descriptors.
+ The feature is over engineered and not needed for `CoreDb`, neither
  is it complete (some convergence features missing.)

* Add debugging helpers to `Kvt`

also:
  Update database iterator, add count variable yield argument similar
  to `Aristo`.

* Provide optional destructors for `CoreDb` API

why;
  For the upcoming Aristo wrapper, this allows to control when certain
  smart destruction and update can take place. The auto destructor works
  fine in general when the storage/cache strategy is known and acceptable
  when creating descriptors.

* Add update option for `CoreDb` API function `hash()`

why;
  The hash function is typically used to get the state root of the MPT.
  Due to lazy hashing, this might be not available on the `Aristo` DB.
  So the `update` function asks for re-hashing the gurrent state changes
  if needed.

* Update API tracking log mode: `info` => `debug

* Use shared `Kvt` descriptor in new Ledger API

why:
  No need to create a new descriptor all the time
2023-11-16 19:35:03 +00:00

75 lines
3.0 KiB
Nim

# Nimbus
# Copyright (c) 2018-2023 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
# at your option. This file may not be copied, modified, or distributed except according to those terms.
import
unittest2, sequtils,
eth/common/eth_types,
../nimbus/[errors, vm_internals]
proc memory32: Memory =
result = newMemory()
result.extend(0, 32)
proc memory128: Memory =
result = newMemory()
result.extend(0, 128)
proc memoryMain*() =
suite "memory":
test "write":
var mem = memory32()
# Test that write creates 32byte string == value padded with zeros
mem.write(startPos = 0, value = @[1.byte, 0.byte, 1.byte, 0.byte])
check(mem.bytes == @[1.byte, 0.byte, 1.byte, 0.byte].concat(repeat(0.byte, 28)))
# test "write rejects invalid position":
# expect(ValidationError):
# var mem = memory32()
# mem.write(startPosition = -1.i256, size = 2.i256, value = @[1.byte, 0.byte])
# expect(ValidationError):
# TODO: work on 256
# var mem = memory32()
# echo "pow ", pow(2.i256, 255) - 1.i256
# mem.write(startPosition = pow(2.i256, 256), size = 2.i256, value = @[1.byte, 0.byte])
# test "write rejects invalid size":
# # expect(ValidationError):
# # var mem = memory32()
# # mem.write(startPosition = 0.i256, size = -1.i256, value = @[1.byte, 0.byte])
# #TODO deactivated because of no pow support in Stint: https://github.com/status-im/nim-stint/issues/37
# expect(ValidationError):
# var mem = memory32()
# mem.write(startPosition = 0.u256, size = pow(2.u256, 256), value = @[1.byte, 0.byte])
test "write rejects values beyond memory size":
expect(ValidationError):
var mem = memory128()
mem.write(startPos = 128, value = @[1.byte, 0.byte, 1.byte, 0.byte])
test "extends appropriately extends memory":
var mem = newMemory()
# Test extends to 32 byte array: 0 < (start_position + size) <= 32
mem.extend(startPos = 0, size = 10)
check(mem.bytes == repeat(0.byte, 32))
# Test will extend past length if params require: 32 < (start_position + size) <= 64
mem.extend(startPos = 28, size = 32)
check(mem.bytes == repeat(0.byte, 64))
# Test won't extend past length unless params require: 32 < (start_position + size) <= 64
mem.extend(startPos = 48, size = 10)
check(mem.bytes == repeat(0.byte, 64))
test "read returns correct bytes":
var mem = memory32()
mem.write(startPos = 5, value = @[1.byte, 0.byte, 1.byte, 0.byte])
check(mem.read(startPos = 5, size = 4) == @[1.byte, 0.byte, 1.byte, 0.byte])
check(mem.read(startPos = 6, size = 4) == @[0.byte, 1.byte, 0.byte, 0.byte])
check(mem.read(startPos = 1, size = 3) == @[0.byte, 0.byte, 0.byte])
when isMainModule:
memoryMain()