move exchange_helpers to data module

freqtrade/tests/data/test_convert.py

@@ -0,0 +1,25 @@
+# pragma pylint: disable=missing-docstring, C0103
+import logging
+
+from freqtrade.data.convert import parse_ticker_dataframe
+from freqtrade.tests.conftest import log_has
+
+
+def test_dataframe_correct_length(result):
+    dataframe = parse_ticker_dataframe(result)
+    assert len(result.index) - 1 == len(dataframe.index)    # last partial candle removed
+
+
+def test_dataframe_correct_columns(result):
+    assert result.columns.tolist() == \
+        ['date', 'open', 'high', 'low', 'close', 'volume']
+
+
+def test_parse_ticker_dataframe(ticker_history, caplog):
+    columns = ['date', 'open', 'high', 'low', 'close', 'volume']
+
+    caplog.set_level(logging.DEBUG)
+    # Test file with BV data
+    dataframe = parse_ticker_dataframe(ticker_history)
+    assert dataframe.columns.tolist() == columns
+    assert log_has('Parsing tickerlist to dataframe', caplog.record_tuples)