nimbus-eth1/tests/test_difficulty.nim

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import unittest2, strutils, tables, os, json,
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../nimbus/utils/difficulty, stint, times,
eth/common, test_helpers, stew/byteutils
type
Tester = object
parentTimestamp: int64
parentDifficulty: Uint256
parentUncles: Hash256
currentTimestamp: int64
currentBlockNumber: Uint256
currentDifficulty: Uint256
Tests = Table[string, Tester]
proc hexOrInt64(data: JsonNode, key: string, hex: static[bool]): int64 =
when hex:
getHexadecimalInt data[key]
else:
int64(parseInt data[key].getStr)
proc hexOrInt256(data: JsonNode, key: string, hex: static[bool]): Uint256 =
when hex:
UInt256.fromHex data[key].getStr
else:
parse(data[key].getStr, Uint256)
proc parseTests(name: string, hex: static[bool]): Tests =
let fileName = "tests" / "fixtures" / "DifficultyTests" / "difficulty" & name & ".json"
let fixtures = parseJSON(readFile(fileName))
result = initTable[string, Tester]()
var t: Tester
for title, data in fixtures:
t.parentTimestamp = hexOrInt64(data, "parentTimestamp", hex)
t.parentDifficulty = hexOrInt256(data, "parentDifficulty", hex)
hexToByteArray(data["parentUncles"].getStr, t.parentUncles.data)
t.currentTimestamp = hexOrInt64(data, "currentTimestamp", hex)
t.currentBlockNumber = hexOrInt256(data, "currentBlockNumber", hex)
t.currentDifficulty = hexOrInt256(data, "currentDifficulty", hex)
result[title] = t
template runTests(name: string, hex: bool, calculator: typed) =
test name:
let data = parseTests(name, hex)
for title, t in data:
var p = BlockHeader(
difficulty: t.parentDifficulty,
timestamp: times.fromUnix(t.parentTimestamp),
blockNumber: t.currentBlockNumber - 1,
ommersHash: t.parentUncles)
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let diff = calculator(times.fromUnix(t.currentTimeStamp), p)
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check diff == t.currentDifficulty
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proc difficultyMain*() =
suite "DifficultyTest":
runTests("Byzantium", true, calcDifficultyByzantium)
runTests("Constantinople", true, calcDifficultyConstantinople)
runTests("Homestead", true, calcDifficultyHomestead)
runTests("Frontier", true, calcDifficultyFrontier)
runTests("", false, calcDifficulty)
when isMainModule:
difficultyMain()