file_dump_json

freqtrade/tests/test_misc.py

@@ -5,10 +5,11 @@ import argparse
 from copy import deepcopy
 
 import pytest
+from unittest.mock import MagicMock
 from jsonschema import ValidationError
 
 from freqtrade.misc import throttle, parse_args, load_config,\
-     parse_args_common
+     parse_args_common, file_dump_json
 
 
 def test_throttle():
@@ -135,6 +136,14 @@ def test_parse_args_hyperopt_custom(mocker):
     assert call_args.func is not None
 
 
+def test_file_dump_json(default_conf, mocker):
+    file_open = mocker.patch('freqtrade.misc.open', MagicMock())
+    json_dump = mocker.patch('json.dump', MagicMock())
+    file_dump_json('somefile', [1, 2, 3])
+    assert file_open.call_count == 1
+    assert json_dump.call_count == 1
+
+
 def test_load_config(default_conf, mocker):
     file_mock = mocker.patch('freqtrade.misc.open', mocker.mock_open(
         read_data=json.dumps(default_conf)

freqtrade/tests/testdata/download_backtest_data.py

@@ -1,11 +1,11 @@
 #!/usr/bin/env python3
 
 """This script generate json data from bittrex"""
-import json
 from os import path
 
 from freqtrade import exchange
 from freqtrade.exchange import Bittrex
+from freqtrade import misc
 
 PAIRS = [
     'BTC_BCC', 'BTC_ETH', 'BTC_MER', 'BTC_POWR', 'BTC_ETC',
@@ -25,5 +25,4 @@ for pair in PAIRS:
         pair,
         TICKER_INTERVAL,
     ))
-    with open(filename, 'w') as fp:
-        json.dump(data, fp)
+    misc.file_dump_json(filename, data)