From ae64b1d95de1cf67f619ddb81c683a1d666f545d Mon Sep 17 00:00:00 2001
From: creslinux <creslin@gmail.com>
Date: Mon, 30 Jul 2018 16:23:49 +0000
Subject: [PATCH] Added tests for precision on  - price ( 4 places round up)  -
 amount ( 4 places round down)

---
 freqtrade/tests/exchange/test_exchange.py | 43 +++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/freqtrade/tests/exchange/test_exchange.py b/freqtrade/tests/exchange/test_exchange.py
index 2c58d928c..e7655e5f1 100644
--- a/freqtrade/tests/exchange/test_exchange.py
+++ b/freqtrade/tests/exchange/test_exchange.py
@@ -51,6 +51,49 @@ def test_init_exception(default_conf, mocker):
         mocker.patch("ccxt.binance", MagicMock(side_effect=AttributeError))
         Exchange(default_conf)
 
+def test_symbol_amount_prec(default_conf, mocker):
+    '''
+    Test rounds down to 4 Decimal places
+    '''
+    api_mock = MagicMock()
+    api_mock.load_markets = MagicMock(return_value={
+        'ETH/BTC': '', 'LTC/BTC': '', 'XRP/BTC': '', 'NEO/BTC': ''
+    })
+    mocker.patch('freqtrade.exchange.Exchange.name', PropertyMock(return_value='binance'))
+
+    markets = PropertyMock(return_value={'ETH/BTC': {'precision': {'amount': 4}}})
+    type(api_mock).markets = markets
+
+    mocker.patch('freqtrade.exchange.Exchange._init_ccxt', MagicMock(return_value=api_mock))
+    mocker.patch('freqtrade.exchange.Exchange.validate_timeframes', MagicMock())
+    exchange = Exchange(default_conf)
+
+    amount = 2.34559
+    pair = 'ETH/BTC'
+    amount = exchange.symbol_amount_prec(pair, amount)
+    assert amount == 2.3455
+
+def test_symbol_price_prec(default_conf, mocker):
+    '''
+    Test rounds up to 4 decimal places
+    '''
+    api_mock = MagicMock()
+    api_mock.load_markets = MagicMock(return_value={
+        'ETH/BTC': '', 'LTC/BTC': '', 'XRP/BTC': '', 'NEO/BTC': ''
+    })
+    mocker.patch('freqtrade.exchange.Exchange.name', PropertyMock(return_value='binance'))
+
+    markets = PropertyMock(return_value={'ETH/BTC': {'precision': {'price': 4}}})
+    type(api_mock).markets = markets
+
+    mocker.patch('freqtrade.exchange.Exchange._init_ccxt', MagicMock(return_value=api_mock))
+    mocker.patch('freqtrade.exchange.Exchange.validate_timeframes', MagicMock())
+    exchange = Exchange(default_conf)
+
+    price = 2.34559
+    pair = 'ETH/BTC'
+    price = exchange.symbol_price_prec(pair, price)
+    assert price == 2.3456
 
 def test_set_sandbox(default_conf, mocker):
     """