adding test: create order should consider TIF

freqtrade/tests/exchange/test_exchange.py

@@ -500,6 +500,36 @@ def test_buy_prod(default_conf, mocker):
                      amount=1, rate=200, time_in_force=time_in_force)
 
 
+def test_buy_considers_time_in_force(default_conf, mocker):
+    api_mock = MagicMock()
+    order_id = 'test_prod_buy_{}'.format(randint(0, 10 ** 6))
+    order_type = 'market'
+    time_in_force = 'ioc'
+    api_mock.create_order = MagicMock(return_value={
+        'id': order_id,
+        'info': {
+            'foo': 'bar'
+        }
+    })
+    default_conf['dry_run'] = False
+    mocker.patch('freqtrade.exchange.Exchange.symbol_amount_prec', lambda s, x, y: y)
+    mocker.patch('freqtrade.exchange.Exchange.symbol_price_prec', lambda s, x, y: y)
+    exchange = get_patched_exchange(mocker, default_conf, api_mock)
+
+    order = exchange.buy(pair='ETH/BTC', ordertype=order_type,
+                         amount=1, rate=200, time_in_force=time_in_force)
+
+    assert 'id' in order
+    assert 'info' in order
+    assert order['id'] == order_id
+    assert api_mock.create_order.call_args[0][0] == 'ETH/BTC'
+    assert api_mock.create_order.call_args[0][1] == order_type
+    assert api_mock.create_order.call_args[0][2] == 'buy'
+    assert api_mock.create_order.call_args[0][3] == 1
+    assert api_mock.create_order.call_args[0][4] is None
+    assert api_mock.create_order.call_args[0][5] == {'timeInForce': 'ioc'}
+
+
 def test_sell_dry_run(default_conf, mocker):
     default_conf['dry_run'] = True
     exchange = get_patched_exchange(mocker, default_conf)