Implement pair_to_filename to datahandler

includes tests - taken from #2744 and modified to adapt to new structure

freqtrade/data/history/jsondatahandler.py

@@ -30,7 +30,7 @@ class JsonDataHandler(IDataHandler):
         _tmp = [re.search(r'^(\S+)(?=\-' + timeframe + '.json)', p.name)
                 for p in datadir.glob(f"*{timeframe}.{cls._get_file_extension()}")]
         # Check if regex found something and only return these results
-        return [match[0].replace('_', '/') for match in _tmp if match]
+        return [misc.pair_to_filename(match[0]) for match in _tmp if match]
 
     def ohlcv_store(self, pair: str, timeframe: str, data: DataFrame) -> None:
         """
@@ -109,7 +109,7 @@ class JsonDataHandler(IDataHandler):
         _tmp = [re.search(r'^(\S+)(?=\-trades.json)', p.name)
                 for p in datadir.glob(f"*trades.{cls._get_file_extension()}")]
         # Check if regex found something and only return these results to avoid exceptions.
-        return [match[0].replace('_', '/') for match in _tmp if match]
+        return [misc.pair_to_filename(match[0]) for match in _tmp if match]
 
     def trades_store(self, pair: str, data: List[Dict]) -> None:
         """
@@ -157,7 +157,7 @@ class JsonDataHandler(IDataHandler):
 
     @classmethod
     def _pair_data_filename(cls, datadir: Path, pair: str, timeframe: str) -> Path:
-        pair_s = pair.replace("/", "_")
+        pair_s = misc.pair_to_filename(pair)
         filename = datadir.joinpath(f'{pair_s}-{timeframe}.{cls._get_file_extension()}')
         return filename
 
@@ -167,7 +167,7 @@ class JsonDataHandler(IDataHandler):
 
     @classmethod
     def _pair_trades_filename(cls, datadir: Path, pair: str) -> Path:
-        pair_s = pair.replace("/", "_")
+        pair_s = misc.pair_to_filename(pair)
         filename = datadir.joinpath(f'{pair_s}-trades.{cls._get_file_extension()}')
         return filename
 

freqtrade/misc.py

@@ -93,7 +93,7 @@ def file_load_json(file):
 
 
 def pair_to_filename(pair: str) -> str:
-    for ch in ['/', ' ', '.']:
+    for ch in ['/', '-', ' ', '.', '@', '$', '+', ':']:
         pair = pair.replace(ch, '_')
     return pair
 

tests/data/test_history.py

@@ -144,23 +144,39 @@ def test_testdata_path(testdatadir) -> None:
     assert str(Path('tests') / 'testdata') in str(testdatadir)
 
 
-def test_json_pair_data_filename():
-    fn = JsonDataHandler._pair_data_filename(Path('freqtrade/hello/world'), 'ETH/BTC', '5m')
+@pytest.mark.parametrize("pair,expected_result", [
+    ("ETH/BTC", 'freqtrade/hello/world/ETH_BTC-5m.json'),
+    ("Fabric Token/ETH", 'freqtrade/hello/world/Fabric_Token_ETH-5m.json'),
+    ("ETHH20", 'freqtrade/hello/world/ETHH20-5m.json'),
+    (".XBTBON2H", 'freqtrade/hello/world/_XBTBON2H-5m.json'),
+    ("ETHUSD.d", 'freqtrade/hello/world/ETHUSD_d-5m.json'),
+    ("ACC_OLD/BTC", 'freqtrade/hello/world/ACC_OLD_BTC-5m.json'),
+])
+def test_json_pair_data_filename(pair, expected_result):
+    fn = JsonDataHandler._pair_data_filename(Path('freqtrade/hello/world'), pair, '5m')
     assert isinstance(fn, Path)
-    assert fn == Path('freqtrade/hello/world/ETH_BTC-5m.json')
-    fn = JsonGzDataHandler._pair_data_filename(Path('freqtrade/hello/world'), 'ETH/BTC', '5m')
+    assert fn == Path(expected_result)
+    fn = JsonGzDataHandler._pair_data_filename(Path('freqtrade/hello/world'), pair, '5m')
     assert isinstance(fn, Path)
-    assert fn == Path('freqtrade/hello/world/ETH_BTC-5m.json.gz')
+    assert fn == Path(expected_result + '.gz')
 
 
-def test_json_pair_trades_filename():
-    fn = JsonDataHandler._pair_trades_filename(Path('freqtrade/hello/world'), 'ETH/BTC')
+@pytest.mark.parametrize("pair,expected_result", [
+    ("ETH/BTC", 'freqtrade/hello/world/ETH_BTC-trades.json'),
+    ("Fabric Token/ETH", 'freqtrade/hello/world/Fabric_Token_ETH-trades.json'),
+    ("ETHH20", 'freqtrade/hello/world/ETHH20-trades.json'),
+    (".XBTBON2H", 'freqtrade/hello/world/_XBTBON2H-trades.json'),
+    ("ETHUSD.d", 'freqtrade/hello/world/ETHUSD_d-trades.json'),
+    ("ACC_OLD_BTC", 'freqtrade/hello/world/ACC_OLD_BTC-trades.json'),
+])
+def test_json_pair_trades_filename(pair, expected_result):
+    fn = JsonDataHandler._pair_trades_filename(Path('freqtrade/hello/world'), pair)
     assert isinstance(fn, Path)
-    assert fn == Path('freqtrade/hello/world/ETH_BTC-trades.json')
+    assert fn == Path(expected_result)
 
-    fn = JsonGzDataHandler._pair_trades_filename(Path('freqtrade/hello/world'), 'ETH/BTC')
+    fn = JsonGzDataHandler._pair_trades_filename(Path('freqtrade/hello/world'), pair)
     assert isinstance(fn, Path)
-    assert fn == Path('freqtrade/hello/world/ETH_BTC-trades.json.gz')
+    assert fn == Path(expected_result + '.gz')
 
 
 def test_load_cached_data_for_updating(mocker, testdatadir) -> None:

tests/test_misc.py

@@ -4,9 +4,12 @@ import datetime
 from pathlib import Path
 from unittest.mock import MagicMock
 
+import pytest
+
 from freqtrade.data.converter import parse_ticker_dataframe
 from freqtrade.misc import (datesarray_to_datetimearray, file_dump_json,
-                            file_load_json, format_ms_time, plural, shorten_date)
+                            file_load_json, format_ms_time, pair_to_filename,
+                            plural, shorten_date)
 
 
 def test_shorten_date() -> None:
@@ -57,6 +60,26 @@ def test_file_load_json(mocker, testdatadir) -> None:
     assert ret
 
 
+@pytest.mark.parametrize("pair,expected_result", [
+    ("ETH/BTC", 'ETH_BTC'),
+    ("Fabric Token/ETH", 'Fabric_Token_ETH'),
+    ("ETHH20", 'ETHH20'),
+    (".XBTBON2H", '_XBTBON2H'),
+    ("ETHUSD.d", 'ETHUSD_d'),
+    ("ADA-0327", 'ADA_0327'),
+    ("BTC-USD-200110", 'BTC_USD_200110'),
+    ("F-AKRO/USDT", 'F_AKRO_USDT'),
+    ("LC+/ETH", 'LC__ETH'),
+    ("CMT@18/ETH", 'CMT_18_ETH'),
+    ("LBTC:1022/SAI", 'LBTC_1022_SAI'),
+    ("$PAC/BTC", '_PAC_BTC'),
+    ("ACC_OLD/BTC", 'ACC_OLD_BTC'),
+])
+def test_pair_to_filename(pair, expected_result):
+    pair_s = pair_to_filename(pair)
+    assert pair_s == expected_result
+
+
 def test_format_ms_time() -> None:
     # Date 2018-04-10 18:02:01
     date_in_epoch_ms = 1523383321000