use Path.open() instead of open

tests/data/test_history.py

@@ -191,7 +191,7 @@ def test_load_cached_data_for_updating(mocker, testdatadir) -> None:
 
     test_data = None
     test_filename = testdatadir.joinpath('UNITTEST_BTC-1m.json')
-    with open(test_filename, "rt") as file:
+    with test_filename.open("rt") as file:
         test_data = json.load(file)
 
     test_data_df = ohlcv_to_dataframe(test_data, '1m', 'UNITTEST/BTC',

tests/optimize/test_optimize_reports.py

@@ -255,7 +255,7 @@ def test_write_read_backtest_candles(tmpdir):
 
     # test directory exporting
     stored_file = store_backtest_signal_candles(Path(tmpdir), candle_dict, '2022_01_01_15_05_13')
-    scp = open(stored_file, "rb")
+    scp = stored_file.open("rb")
     pickled_signal_candles = joblib.load(scp)
     scp.close()
 
@@ -269,7 +269,7 @@ def test_write_read_backtest_candles(tmpdir):
     # test file exporting
     filename = Path(tmpdir / 'testresult')
     stored_file = store_backtest_signal_candles(filename, candle_dict, '2022_01_01_15_05_13')
-    scp = open(stored_file, "rb")
+    scp = stored_file.open("rb")
     pickled_signal_candles = joblib.load(scp)
     scp.close()
 

tests/test_configuration.py

@@ -59,7 +59,7 @@ def test_load_config_incorrect_stake_amount(default_conf) -> None:
 def test_load_config_file(default_conf, mocker, caplog) -> None:
     del default_conf['user_data_dir']
     default_conf['datadir'] = str(default_conf['datadir'])
-    file_mock = mocker.patch('freqtrade.configuration.load_config.open', mocker.mock_open(
+    file_mock = mocker.patch('freqtrade.configuration.load_config.Path.open', mocker.mock_open(
         read_data=json.dumps(default_conf)
     ))
 
@@ -272,7 +272,7 @@ def test_load_config_max_open_trades_minus_one(default_conf, mocker, caplog) ->
 
 def test_load_config_file_exception(mocker) -> None:
     mocker.patch(
-        'freqtrade.configuration.configuration.open',
+        'freqtrade.configuration.configuration.Path.open',
         MagicMock(side_effect=FileNotFoundError('File not found'))
     )
 

tests/test_misc.py

@@ -46,7 +46,7 @@ def test_shorten_date() -> None:
 
 
 def test_file_dump_json(mocker) -> None:
-    file_open = mocker.patch('freqtrade.misc.open', MagicMock())
+    file_open = mocker.patch('freqtrade.misc.Path.open', MagicMock())
     json_dump = mocker.patch('rapidjson.dump', MagicMock())
     file_dump_json(Path('somefile'), [1, 2, 3])
     assert file_open.call_count == 1