Initial commit

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
+PERIOD = 2
+
+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)
+        c = self.w3.eth.contract(abi=self.abi, bytecode=self.bytecode)
+        tx_hash = c.constructor('Foo Token', 'FOO', TAX_LEVEL, PERIOD).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
+
+
+    def test_period(self):
+        self.assertEqual(self.contract.functions.actualPeriod().call(), 0)
+        self.eth_tester.mine_blocks(PERIOD)
+        self.assertEqual(self.contract.functions.actualPeriod().call(), 1)
+
+    def test_apply_tax(self):
+        tx = self.contract.functions.noop().buildTransaction()
+        logg.debug('gas {}'.format(self.w3.eth.estimateGas(tx)))
+
+        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(), TAX_LEVEL);
+
+        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(), 3);
+        self.assertEqual(self.contract.functions.demurrageModifier().call(), TAX_LEVEL * 2);
+
+if __name__ == '__main__':
+    unittest.main()
+
+