Add test for apply_fee_conditional

tests/test_freqtradebot.py

@@ -3305,6 +3305,30 @@ def test_get_real_amount_quote(default_conf, trades_for_order, buy_order_fee, fe
                    caplog)
 
 
+def test_get_real_amount_quote_dust(default_conf, trades_for_order, buy_order_fee, fee, caplog, mocker):
+    mocker.patch('freqtrade.exchange.Exchange.get_trades_for_order', return_value=trades_for_order)
+    walletmock = mocker.patch('freqtrade.wallets.Wallets.update')
+    mocker.patch('freqtrade.wallets.Wallets.get_free', return_value=8.1122)
+    amount = sum(x['amount'] for x in trades_for_order)
+    trade = Trade(
+        pair='LTC/ETH',
+        amount=amount,
+        exchange='binance',
+        open_rate=0.245441,
+        fee_open=fee.return_value,
+        fee_close=fee.return_value,
+        open_order_id="123456"
+    )
+    freqtrade = get_patched_freqtradebot(mocker, default_conf)
+
+    walletmock.reset_mock()
+    # Amount is kept as is
+    assert freqtrade.get_real_amount(trade, buy_order_fee) == amount
+    assert walletmock.call_count == 1
+    assert log_has_re(r'Fee amount for Trade.* was in base currency '
+                        '- Eating Fee 0.008 into dust', caplog)
+
+
 def test_get_real_amount_no_trade(default_conf, buy_order_fee, caplog, mocker, fee):
     mocker.patch('freqtrade.exchange.Exchange.get_trades_for_order', return_value=[])