fix: use as_unit instead of int math

tests/conftest.py

@@ -207,7 +207,7 @@ def generate_test_data(
 def generate_test_data_raw(timeframe: str, size: int, start: str = "2020-07-05", random_seed=42):
     """Generates data in the ohlcv format used by ccxt"""
     df = generate_test_data(timeframe, size, start, random_seed)
-    df["date"] = df.loc[:, "date"].dt.as_unit("ms").astype(np.int64)
+    df["date"] = df.loc[:, "date"].dt.as_unit("ms").astype("int64")
     return list(list(x) for x in zip(*(df[x].values.tolist() for x in df.columns), strict=False))
 
 

tests/exchange/test_binance_public_data.py

@@ -69,7 +69,7 @@ def make_response_from_url(start_date, end_date):
             "taker_buy_quote_volume,ignore"
         )
         df = pd.DataFrame(columns=cols.split(","), dtype=float)
-        df["open_time"] = date_col.astype("int64") // 10**6
+        df["open_time"] = date_col.as_unit("ms").astype("int64")
         df["open"] = df["high"] = df["low"] = df["close"] = df["volume"] = 1.0
         return df