Applied "Formatting and new enumeration for Cellxgene-gateway" patch

tests/test_cache_entry.py

@@ -0,0 +1,13 @@
+import unittest
+from unittest.mock import MagicMock, patch
+
+from cellxgene_gateway.cache_entry import CacheEntry, CacheEntryStatus
+
+
+class TestCacheEntry(unittest.TestCase):
+    def test_GIVEN_key_and_port_THEN_returns_loading_CacheEntry(self):
+        entry = CacheEntry.for_key("some-key", 1)
+        self.assertEqual(entry.status, CacheEntryStatus.loading)
+
+if __name__ == "__main__":
+    unittest.main()