Add simple caching implementation for database queries that will be used in command autocompletion

tests/test_database/test_utils/test_caches.py

@@ -0,0 +1,27 @@
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from database.models import UforaCourse
+from database.utils.caches import UforaCourseCache
+
+
+async def test_ufora_course_cache_refresh_empty(database_session: AsyncSession, ufora_course_with_alias: UforaCourse):
+    """Test loading the data for the Ufora Course cache when it's empty"""
+    cache = UforaCourseCache()
+    await cache.refresh(database_session)
+
+    assert len(cache.data) == 2
+    assert cache.data == ["alias", "test"]
+
+
+async def test_ufora_course_cache_refresh_not_empty(
+    database_session: AsyncSession, ufora_course_with_alias: UforaCourse
+):
+    """Test loading the data for the Ufora Course cache when it's not empty anymore"""
+    cache = UforaCourseCache()
+    cache.data = ["Something"]
+    cache.data_transformed = ["something"]
+
+    await cache.refresh(database_session)
+
+    assert len(cache.data) == 2
+    assert cache.data == ["alias", "test"]