Return /profit even if no trade is closed

tests/rpc/test_rpc.py

@@ -279,8 +279,12 @@ def test_rpc_trade_statistics(default_conf, ticker, ticker_sell_up, fee,
     rpc = RPC(freqtradebot)
     rpc._fiat_converter = CryptoToFiatConverter()
 
-    with pytest.raises(RPCException, match=r'.*no closed trade*'):
-        rpc._rpc_trade_statistics(stake_currency, fiat_display_currency)
+    res = rpc._rpc_trade_statistics(stake_currency, fiat_display_currency)
+    assert res['trade_count'] == 0
+    assert res['first_trade_date'] == ''
+    assert res['first_trade_timestamp'] == 0
+    assert res['latest_trade_date'] == ''
+    assert res['latest_trade_timestamp'] == 0
 
     # Create some test data
     freqtradebot.enter_positions()

tests/rpc/test_rpc_apiserver.py

@@ -396,9 +396,8 @@ def test_api_profit(botclient, mocker, ticker, fee, markets, limit_buy_order, li
     )
 
     rc = client_get(client, f"{BASE_URI}/profit")
-    assert_response(rc, 502)
-    assert len(rc.json) == 1
-    assert rc.json == {"error": "Error querying _profit: no closed trade"}
+    assert_response(rc, 200)
+    assert rc.json['trade_count'] == 0
 
     ftbot.enter_positions()
     trade = Trade.query.first()
@@ -406,8 +405,11 @@ def test_api_profit(botclient, mocker, ticker, fee, markets, limit_buy_order, li
     # Simulate fulfilled LIMIT_BUY order for trade
     trade.update(limit_buy_order)
     rc = client_get(client, f"{BASE_URI}/profit")
-    assert_response(rc, 502)
-    assert rc.json == {"error": "Error querying _profit: no closed trade"}
+    assert_response(rc, 200)
+    # One open trade
+    assert rc.json['trade_count'] == 1
+    assert rc.json['best_pair'] == ''
+    assert rc.json['best_rate'] == 0
 
     trade.update(limit_sell_order)