chore: add test for trades_get_available_data

tests/data/test_datahandler.py

@@ -519,6 +519,21 @@ def test_datahandler_trades_purge(mocker, testdatadir, datahandler):
     assert unlinkmock.call_count == 1
 
 
+def test_datahandler_trades_get_available_data(testdatadir):
+    paircombs = FeatherDataHandler.trades_get_available_data(testdatadir, TradingMode.SPOT)
+    # Convert to set to avoid failures due to sorting
+    assert set(paircombs) == {"XRP/ETH"}
+
+    paircombs = FeatherDataHandler.trades_get_available_data(testdatadir, TradingMode.FUTURES)
+    # Convert to set to avoid failures due to sorting
+    assert set(paircombs) == set()
+
+    paircombs = JsonGzDataHandler.trades_get_available_data(testdatadir, TradingMode.SPOT)
+    assert set(paircombs) == {"XRP/ETH", "XRP/OLD"}
+    paircombs = HDF5DataHandler.trades_get_available_data(testdatadir, TradingMode.SPOT)
+    assert set(paircombs) == {"XRP/ETH"}
+
+
 def test_gethandlerclass():
     cl = get_datahandlerclass("json")
     assert cl == JsonDataHandler