nimbus-eth1/tests/test_gas_meter.nim

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# 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
unittest2, macros, strformat,
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eth/common/eth_types,
../nimbus/[vm_types, errors, vm/interpreter]
# TODO: quicktest
# PS: parametrize can be easily immitated, but still quicktests would be even more useful
# disableLogging()
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proc initGasMeter(startGas: GasInt): GasMeter = result.init(startGas)
proc gasMeters: seq[GasMeter] =
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@[initGasMeter(10), initGasMeter(100), initGasMeter(999)]
macro all(element: untyped, handler: untyped): untyped =
let name = ident(&"{element.repr}s")
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let StartGas = ident("StartGas")
result = quote:
var res = `name`()
for `element` in res.mitems:
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let `StartGas` = `element`.gasRemaining
`handler`
# @pytest.mark.parametrize("value", (0, 10))
# def test_start_gas_on_instantiation(value):
# meter = GasMeter(value)
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# doAssert meter.start_gas == value
# doAssert meter.gas_remaining == value
# doAssert 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")
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# doAssert 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)
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# doAssert 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)
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# doAssert gas_meter.gas_refunded == amount
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proc gasMeterMain*() =
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):
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check(gasMeter.gasRemaining == StartGas)
let consume = StartGas
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gasMeter.consumeGas(consume, "0")
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check(gasMeter.gasRemaining - (StartGas - consume) == 0)
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test "consume errors":
all(gasMeter):
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check(gasMeter.gasRemaining == StartGas)
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expect(OutOfGas):
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gasMeter.consumeGas(StartGas + 1, "")
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test "return refund works correctly":
all(gasMeter):
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check(gasMeter.gasRemaining == StartGas)
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check(gasMeter.gasRefunded == 0)
gasMeter.consumeGas(5, "")
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check(gasMeter.gasRemaining == StartGas - 5)
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gasMeter.returnGas(5)
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check(gasMeter.gasRemaining == StartGas)
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gasMeter.refundGas(5)
check(gasMeter.gasRefunded == 5)
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when isMainModule:
gasMeterMain()