test: pandas warning tests to show warnings

tests/strategy/test_interface.py

@@ -1047,7 +1047,7 @@ def test_pandas_warning_direct(ohlcv_history, function, raises, recwarn):
         # Fixed in 2.2.x
         getattr(_STRATEGY, function)(df, {"pair": "ETH/BTC"})
     else:
-        assert len(recwarn) == 0
+        assert len(recwarn) == 0, f"warnings: {', '.join(recwarn.list)}"
 
         getattr(_STRATEGY, function)(df, {"pair": "ETH/BTC"})
 
@@ -1055,4 +1055,4 @@ def test_pandas_warning_direct(ohlcv_history, function, raises, recwarn):
 def test_pandas_warning_through_analyze_pair(ohlcv_history, mocker, recwarn):
     mocker.patch.object(_STRATEGY.dp, "ohlcv", return_value=ohlcv_history)
     _STRATEGY.analyze_pair("ETH/BTC")
-    assert len(recwarn) == 0
+    assert len(recwarn) == 0, f"warnings: {', '.join(recwarn.list)}"