erc20-demurrage-token/python/tests/test_pure.py
2021-03-01 09:53:39 +00:00

109 lines
3.3 KiB
Python

# standard imports
import os
import unittest
import json
import logging
import math
# third-party imports
import web3
import eth_tester
import eth_abi
logging.basicConfig(level=logging.DEBUG)
logg = logging.getLogger()
logging.getLogger('web3').setLevel(logging.WARNING)
logging.getLogger('eth.vm').setLevel(logging.WARNING)
testdir = os.path.dirname(__file__)
#BLOCKTIME = 5 # seconds
TAX_LEVEL = int((10000 * 2) * (10 ** 32)) # 2%
PERIOD = 10
class Test(unittest.TestCase):
contract = None
def setUp(self):
eth_params = eth_tester.backends.pyevm.main.get_default_genesis_params({
'gas_limit': 9000000,
})
f = open(os.path.join(testdir, '../../solidity/RedistributedDemurrageToken.bin'), 'r')
self.bytecode = f.read()
f.close()
f = open(os.path.join(testdir, '../../solidity/RedistributedDemurrageToken.json'), 'r')
self.abi = json.load(f)
f.close()
backend = eth_tester.PyEVMBackend(eth_params)
self.eth_tester = eth_tester.EthereumTester(backend)
provider = web3.Web3.EthereumTesterProvider(self.eth_tester)
self.w3 = web3.Web3(provider)
self.sink_address = self.w3.eth.accounts[9]
c = self.w3.eth.contract(abi=self.abi, bytecode=self.bytecode)
tx_hash = c.constructor('Foo Token', 'FOO', 6, TAX_LEVEL, PERIOD, self.sink_address).transact({'from': self.w3.eth.accounts[0]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.contract = self.w3.eth.contract(abi=self.abi, address=r.contractAddress)
self.start_block = self.w3.eth.blockNumber
def tearDown(self):
pass
@unittest.skip('this function has been removed from contract')
def test_tax_period(self):
t = self.contract.functions.taxLevel().call()
logg.debug('taxlevel {}'.format(t))
a = self.contract.functions.toDemurrageAmount(1000000, 0).call()
self.assertEqual(a, 1000000)
a = self.contract.functions.toDemurrageAmount(1000000, 1).call()
self.assertEqual(a, 980000)
a = self.contract.functions.toDemurrageAmount(1000000, 2).call()
self.assertEqual(a, 960400)
a = self.contract.functions.toDemurrageAmount(980000, 1).call()
self.assertEqual(a, 960400)
def test_fractional_state(self):
with self.assertRaises(eth_tester.exceptions.TransactionFailed):
self.contract.functions.remainder(2, 1).call();
with self.assertRaises(eth_tester.exceptions.TransactionFailed):
remainder = self.contract.functions.remainder(0, 100001).call();
remainder = self.contract.functions.remainder(1, 2).call();
self.assertEqual(remainder, 0);
whole = 5000001
parts = 20000
expect = whole - (math.floor(whole/parts) * parts)
remainder = self.contract.functions.remainder(parts, whole).call();
self.assertEqual(remainder, expect)
parts = 30000
expect = whole - (math.floor(whole/parts) * parts)
remainder = self.contract.functions.remainder(parts, whole).call();
self.assertEqual(remainder, expect)
parts = 40001
expect = whole - (math.floor(whole/parts) * parts)
remainder = self.contract.functions.remainder(parts, whole).call();
self.assertEqual(remainder, expect)
if __name__ == '__main__':
unittest.main()