Bybit futures data download

tests/exchange/test_bybit.py

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+from unittest.mock import MagicMock
+
+from freqtrade.exchange.exchange_utils import timeframe_to_msecs
+from tests.conftest import get_mock_coro, get_patched_exchange
+
+
+async def test_bybit_fetch_funding_rate(default_conf, mocker):
+    default_conf['trading_mode'] = 'futures'
+    default_conf['margin_mode'] = 'isolated'
+    api_mock = MagicMock()
+    api_mock.fetch_funding_rate_history = get_mock_coro(return_value=[])
+    exchange = get_patched_exchange(mocker, default_conf, id='bybit', api_mock=api_mock)
+    limit = 200
+    # Test fetch_funding_rate_history (current data)
+    await exchange._fetch_funding_rate_history(
+        pair='BTC/USDT:USDT',
+        timeframe='4h',
+        limit=limit,
+        )
+
+    assert api_mock.fetch_funding_rate_history.call_count == 1
+    assert api_mock.fetch_funding_rate_history.call_args_list[0][0][0] == 'BTC/USDT:USDT'
+    kwargs = api_mock.fetch_funding_rate_history.call_args_list[0][1]
+    assert kwargs['params'] == {}
+    assert kwargs['since'] is None
+
+    api_mock.fetch_funding_rate_history.reset_mock()
+    since_ms = 1610000000000
+    since_ms_end = since_ms + (timeframe_to_msecs('4h') * limit)
+    # Test fetch_funding_rate_history (current data)
+    await exchange._fetch_funding_rate_history(
+        pair='BTC/USDT:USDT',
+        timeframe='4h',
+        limit=limit,
+        since_ms=since_ms,
+        )
+
+    assert api_mock.fetch_funding_rate_history.call_count == 1
+    assert api_mock.fetch_funding_rate_history.call_args_list[0][0][0] == 'BTC/USDT:USDT'
+    kwargs = api_mock.fetch_funding_rate_history.call_args_list[0][1]
+    assert kwargs['params'] == {'until': since_ms_end}
+    assert kwargs['since'] == since_ms