nimbus-eth1/tests/memory_test.nim

62 lines
2.6 KiB
Nim

import unittest, macros, strformat, strutils, sequtils, constants, opcode_values, errors, vm / memory, bigints
proc memory32: Memory =
result = newMemory()
result.extend(0.i256, 32.i256)
proc memory128: Memory =
result = newMemory()
result.extend(0.i256, 128.i256)
suite "memory":
test "write":
var mem = memory32()
# Test that write creates 32byte string == value padded with zeros
mem.write(startPosition = 0.i256, size = 4.i256, 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):
var mem = memory32()
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])
expect(ValidationError):
var mem = memory32()
mem.write(startPosition = 0.i256, size = pow(2.i256, 256), value = @[1.byte, 0.byte])
test "write rejects invalid value":
expect(ValidationError):
var mem = memory32()
mem.write(startPosition = 0.i256, size = 4.i256, value = @[1.byte, 0.byte])
test "write rejects valyes beyond memory size":
expect(ValidationError):
var mem = memory128()
mem.write(startPosition = 128.i256, size = 4.i256, 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(startPosition = 0.i256, size = 10.i256)
check(mem.bytes == repeat(0.byte, 32))
# Test will extend past length if params require: 32 < (start_position + size) <= 64
mem.extend(startPosition = 28.i256, size = 32.i256)
check(mem.bytes == repeat(0.byte, 64))
# Test won't extend past length unless params require: 32 < (start_position + size) <= 64
mem.extend(startPosition = 48.i256, size = 10.i256)
check(mem.bytes == repeat(0.byte, 64))
test "read returns correct bytes":
var mem = memory32()
mem.write(startPosition = 5.i256, size = 4.i256, value = @[1.byte, 0.byte, 1.byte, 0.byte])
check(mem.read(startPosition = 5.i256, size = 4.i256) == @[1.byte, 0.byte, 1.byte, 0.byte])
check(mem.read(startPosition = 6.i256, size = 4.i256) == @[0.byte, 1.byte, 0.byte, 0.byte])
check(mem.read(startPosition = 1.i256, size = 3.i256) == @[0.byte, 0.byte, 0.byte])