erc20-demurrage-token/python/tests/test_basic.py

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# standard imports
import os
import unittest
import json
import logging
# 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 = 10000 * 2 # 2%
#PERIOD = int(60/BLOCKTIME) * 60 * 24 * 30 # month
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PERIOD = 10
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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()
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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]
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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]})
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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
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def test_hello(self):
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self.assertEqual(self.contract.functions.actualPeriod().call(), 1)
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self.eth_tester.mine_blocks(PERIOD)
self.assertEqual(self.contract.functions.actualPeriod().call(), 2)
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def test_mint(self):
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1024).transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
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balance = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
self.assertEqual(balance, 1024)
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 976).transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
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balance = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
self.assertEqual(balance, 2000)
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def test_transfer(self):
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1024).transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
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tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[2], 500).transact({'from': self.w3.eth.accounts[1]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
logg.debug('tx {}'.format(r))
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balance_alice = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
self.assertEqual(balance_alice, 524)
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balance_bob = self.contract.functions.balanceOf(self.w3.eth.accounts[2]).call()
self.assertEqual(balance_bob, 500)
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tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[2], 500).transact({'from': self.w3.eth.accounts[1]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
logg.debug('tx {}'.format(r))
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def test_transfer_from(self):
tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1024).transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
tx_hash = self.contract.functions.approve(self.w3.eth.accounts[2], 500).transact({'from': self.w3.eth.accounts[1]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
logg.debug('tx {}'.format(r))
balance_alice = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
self.assertEqual(balance_alice, 1024)
tx_hash = self.contract.functions.transferFrom(self.w3.eth.accounts[1], self.w3.eth.accounts[3], 500).transact({'from': self.w3.eth.accounts[2]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
logg.debug('tx {}'.format(r))
balance_alice = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
self.assertEqual(balance_alice, 524)
balance_alice = self.contract.functions.balanceOf(self.w3.eth.accounts[3]).call()
self.assertEqual(balance_alice, 500)
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def test_apply_tax(self):
self.contract.functions.mintTo(self.w3.eth.accounts[1], 1024).transact()
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self.eth_tester.mine_blocks(PERIOD)
tx_hash = self.contract.functions.applyTax().transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(self.contract.functions.redistributionCount().call(), 2)
self.assertEqual(self.contract.functions.demurrageModifier().call(), 980000)
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self.eth_tester.mine_blocks(PERIOD)
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tx_hash = self.contract.functions.applyTax().transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(self.contract.functions.redistributionCount().call(), 3)
self.assertEqual(self.contract.functions.demurrageModifier().call(), 960400)
def test_tax_balance(self):
tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1000).transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
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self.eth_tester.mine_blocks(PERIOD)
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tx_hash = self.contract.functions.applyTax().transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
balance = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
self.assertEqual(balance, 980)
def test_taxed_transfer(self):
tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1000000).transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
self.eth_tester.mine_blocks(PERIOD)
tx_hash = self.contract.functions.applyTax().transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
balance_alice = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
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self.assertEqual(balance_alice, 980000)
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tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[2], 500000).transact({'from': self.w3.eth.accounts[1]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
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logg.debug('r {}'.format(r))
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self.assertEqual(r.status, 1)
balance_alice = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
balance_alice_trunc = int(balance_alice/1000)*1000
self.assertEqual(balance_alice_trunc, 480000)
balance_bob = self.contract.functions.balanceOf(self.w3.eth.accounts[2]).call()
balance_bob_trunc = int(balance_bob/1000)*1000
self.assertEqual(balance_bob_trunc, 500000)
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if __name__ == '__main__':
unittest.main()