Add quoter example contract for decimals translation

python/tests/test_quoter.py

@@ -0,0 +1,61 @@
+# standard imports
+import unittest
+import logging
+import os
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.tx import receipt
+from chainlib.eth.block import block_latest
+from hexathon import same as same_hex
+from eth_erc20 import ERC20
+from giftable_erc20_token import GiftableToken
+from erc20_limiter import Limiter
+
+# local imports
+from erc20_pool.quote import DecimalQuote
+from erc20_pool.unittest.quote import TestDecimalQuote
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger()
+
+class TestQuote(TestDecimalQuote):
+
+    def setUp(self):
+        super(TestQuote, self).setUp()
+        self.tokens = {}
+        self.publish_token('Foo token', 'FOO', 14)
+        self.publish_token('Bar token', 'BAR', 18)
+        self.publish_token('Baz token', 'BAZ', 11)
+
+    def publish_token(self, name, symbol, decimals):
+        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
+        c = GiftableToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        self.symbol = name
+        self.name = symbol
+        self.decimals = decimals
+        (tx_hash, o) = c.constructor(self.accounts[0], self.name, self.symbol, self.decimals, expire=0)
+        self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 1)
+        address = r['contract_address'] 
+        logg.debug('published "{}" ("{}") on address {} with hash {}'.format(name, symbol, address, tx_hash))
+        self.tokens[symbol] = address
+
+
+    def test_quote(self):
+        c = DecimalQuote(self.chain_spec)
+        o = c.value_for(self.quoter_address, self.tokens['FOO'], self.tokens['FOO'], 10**18, sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        self.assertEqual(int(r, 16), 10**18)
+
+        o = c.value_for(self.quoter_address, self.tokens['FOO'], self.tokens['BAR'], 10**18, sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        self.assertEqual(int(r, 16), 10**14)
+
+        o = c.value_for(self.quoter_address, self.tokens['FOO'], self.tokens['BAZ'], 10**18, sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        self.assertEqual(int(r, 16), 10**21)
+
+
+if __name__ == '__main__':
+    unittest.main()