enhance test

tests/commands/test_commands.py

@@ -1,3 +1,4 @@
+import json
 import re
 from pathlib import Path
 from unittest.mock import MagicMock, PropertyMock
@@ -538,10 +539,26 @@ def test_start_new_hyperopt_no_arg(mocker, caplog):
         start_new_hyperopt(get_args(args))
 
 
-def test_start_new_config(mocker, caplog):
+@pytest.mark.parametrize('exchange', ['bittrex', 'binance', 'kraken', 'ftx'])
+def test_start_new_config(mocker, caplog, exchange):
     wt_mock = mocker.patch.object(Path, "write_text", MagicMock())
     mocker.patch.object(Path, "exists", MagicMock(return_value=False))
-
+    sample_selections = {
+        'max_open_trades': 3,
+        'stake_currency': 'USDT',
+        'stake_amount': 100,
+        'fiat_display_currency': 'EUR',
+        'ticker_interval': '15m',
+        'dry_run': True,
+        'exchange_name': exchange,
+        'exchange_key': 'sampleKey',
+        'exchange_secret': 'Samplesecret',
+        'telegram': False,
+        'telegram_token': 'asdf1244',
+        'telegram_chat_id': '1144444',
+    }
+    mocker.patch('freqtrade.commands.deploy_commands.ask_user_config',
+                 return_value=sample_selections)
     args = [
         "new-config",
         "--config",
@@ -549,9 +566,11 @@ def test_start_new_config(mocker, caplog):
     ]
     start_new_config(get_args(args))
 
-    assert wt_mock.call_count == 1
-    assert "binance" in wt_mock.call_args_list[0][0][0]
     assert log_has_re("Writing config to .*", caplog)
+    assert wt_mock.call_count == 1
+    result = json.loads(wt_mock.call_args_list[0][0][0])
+    assert result['exchange']['name'] == exchange
+    assert result['ticker_interval'] == '15m'
 
 
 def test_download_data_keyboardInterrupt(mocker, caplog, markets):