nimbus-eth1/tests/test_gas_meter.nim

99 lines
3.2 KiB
Nim

# Nimbus
# Copyright (c) 2018 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 unittest, macros, strformat, strutils, sequtils,
ttmath,
../src/[constants, opcode_values, errors, logging, vm/gas_meter]
# TODO: quicktest
# PS: parametrize can be easily immitated, but still quicktests would be even more useful
disableLogging()
proc gasMeters: seq[GasMeter] =
@[newGasMeter(10.u256), newGasMeter(100.u256), newGasMeter(999.u256)]
macro all(element: untyped, handler: untyped): untyped =
let name = ident(&"{element.repr}s")
result = quote:
var res = `name`()
for `element` in res.mitems:
`handler`
# @pytest.mark.parametrize("value", (0, 10))
# def test_start_gas_on_instantiation(value):
# meter = GasMeter(value)
# assert meter.start_gas == value
# assert meter.gas_remaining == value
# assert meter.gas_refunded == 0
# @pytest.mark.parametrize("value", (-1, 2**256, 'a'))
# def test_instantiation_invalid_value(value):
# with pytest.raises(ValidationError):
# GasMeter(value)
# @pytest.mark.parametrize("amount", (0, 1, 10))
# def test_consume_gas(gas_meter, amount):
# gas_meter.consume_gas(amount, "reason")
# assert gas_meter.gas_remaining == gas_meter.start_gas - amount
# @pytest.mark.parametrize("amount", (0, 1, 99))
# def test_return_gas(gas_meter, amount):
# gas_meter.return_gas(amount)
# assert gas_meter.gas_remaining == (gas_meter.start_gas + amount)
# @pytest.mark.parametrize("amount", (0, 1, 99))
# def test_refund_gas(gas_meter, amount):
# gas_meter.refund_gas(amount)
# assert gas_meter.gas_refunded == amount
suite "gasMeter":
# types
# test "consume rejects negative":
# all(gasMeter):
# expect(ValidationError):
# gasMeter.consumeGas(-1.i256, "independent")
# test "return rejects negative":
# all(gasMeter):
# expect(ValidationError):
# gasMeter.returnGas(-1.i256)
# test "refund rejects negative":
# all(gasMeter):
# expect(ValidationError):
# gasMeter.returnGas(-1.i256)
# TODO: -0/+0
test "consume spends":
all(gasMeter):
check(gasMeter.gasRemaining == gasMeter.startGas)
let consume = gasMeter.startGas
gasMeter.consumeGas(consume, "0")
check(gasMeter.gasRemaining - (gasMeter.startGas - consume) == 0)
test "consume errors":
all(gasMeter):
check(gasMeter.gasRemaining == gasMeter.startGas)
expect(OutOfGas):
gasMeter.consumeGas(gasMeter.startGas + 1.u256, "")
test "return refund works correctly":
all(gasMeter):
check(gasMeter.gasRemaining == gasMeter.startGas)
check(gasMeter.gasRefunded == 0)
gasMeter.consumeGas(5.u256, "")
check(gasMeter.gasRemaining == gasMeter.startGas - 5.u256)
gasMeter.returnGas(5.u256)
check(gasMeter.gasRemaining == gasMeter.startGas)
gasMeter.refundGas(5.u256)
check(gasMeter.gasRefunded == 5.u256)