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

# standard imports
import os
import unittest
import json
import logging

# external imports
from chainlib.eth.constant import ZERO_ADDRESS
from chainlib.eth.nonce import RPCNonceOracle
from chainlib.eth.tx import receipt

# local imports
from erc20_demurrage_token import DemurrageToken

# test imports
from tests.base import TestDemurrageDefault

logging.basicConfig(level=logging.DEBUG)
logg = logging.getLogger()

testdir = os.path.dirname(__file__)

class TestPeriod(TestDemurrageDefault):

    def test_period(self):
        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[1], 1024)
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)

        self.backend.time_travel(self.start_time + self.period_seconds)

        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.change_period(self.address, self.accounts[0])
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)

        o = c.redistributions(self.address, 1, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        redistribution = c.parse_redistributions(r)

        o = c.to_redistribution_period(self.address, redistribution, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        period = c.parse_to_redistribution_period(r)
        self.assertEqual(2, period)

        o = c.redistributions(self.address, 1, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        redistribution = c.parse_redistributions(r)

        o = c.to_redistribution_period(self.address, redistribution, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        period = c.parse_to_redistribution_period(r)
        self.assertEqual(2, period)

        o = c.actual_period(self.address, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        period = c.parse_actual_period(r)
        self.assertEqual(2, period)

        o = c.to_redistribution_demurrage_modifier(self.address, redistribution, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        period = c.parse_to_redistribution_item(r)

        # allow test code float rounding error to billionth
        modifier = (1 - (self.tax_level / 1000000)) ** (self.period_seconds / 60)
        modifier *= 10 ** 9 
        modifier = int(modifier) * (10 ** (38 - 9))

        period /= (10 ** (38 - 9))
        period = int(period) * (10 ** (38 - 9))
        self.assertEqual(modifier, period)

        self.backend.time_travel(self.start_time + self.period_seconds * 2)

        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
        (tx_hash, o) = c.change_period(self.address, self.accounts[0])
        r = self.rpc.do(o)
        o = receipt(tx_hash)
        r = self.rpc.do(o)
        self.assertEqual(r['status'], 1)

        o = c.redistributions(self.address, 2, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        redistribution = c.parse_redistributions(r)

        o = c.to_redistribution_demurrage_modifier(self.address, redistribution, sender_address=self.accounts[0])
        r = self.rpc.do(o)
        period = c.parse_to_redistribution_item(r)

        # allow test code float rounding error to billionth
        modifier = (1 - (self.tax_level / 1000000)) ** ((self.period_seconds * 2) / 60)
        modifier *= 10 ** 9 
        modifier = int(modifier) * (10 ** (38 - 9))

        period /= (10 ** (38 - 9))
        period = int(period) * (10 ** (38 - 9))
        self.assertEqual(modifier, period)


if __name__ == '__main__':
    unittest.main()