Add test for key_value_store

tests/persistence/test_key_value_store.py

@@ -0,0 +1,37 @@
+from datetime import datetime, timedelta, timezone
+
+import pytest
+
+from freqtrade.persistence.key_value_store import KeyValueStore
+
+
+@pytest.mark.usefixtures("init_persistence")
+def test_key_value_store(time_machine):
+    start = datetime(2023, 1, 1, 4, tzinfo=timezone.utc)
+    time_machine.move_to(start, tick=False)
+
+    KeyValueStore.store_value("test", "testStringValue")
+    KeyValueStore.store_value("test_dt", datetime.now(timezone.utc))
+    KeyValueStore.store_value("test_float", 22.51)
+    KeyValueStore.store_value("test_int", 15)
+
+    assert KeyValueStore.get_value("test") == "testStringValue"
+    assert KeyValueStore.get_value("test_dt") == datetime.now(timezone.utc)
+    assert KeyValueStore.get_value("test_float") == 22.51
+    assert KeyValueStore.get_value("test_int") == 15
+
+    time_machine.move_to(start + timedelta(days=20, hours=5), tick=False)
+    assert KeyValueStore.get_value("test_dt") != datetime.now(timezone.utc)
+    assert KeyValueStore.get_value("test_dt") == start
+    # Test update works
+    KeyValueStore.store_value("test_dt", datetime.now(timezone.utc))
+    assert KeyValueStore.get_value("test_dt") == datetime.now(timezone.utc)
+
+    KeyValueStore.store_value("test_float", 23.51)
+    assert KeyValueStore.get_value("test_float") == 23.51
+    # test deleting
+    KeyValueStore.delete_value("test_float")
+    assert KeyValueStore.get_value("test_float") is None
+
+    with pytest.raises(ValueError, match=r"Unknown value type"):
+        KeyValueStore.store_value("test_float", {'some': 'dict'})