Small fixes

open_rarity/resolver/opensea_api_helpers.py

@@ -427,10 +427,22 @@ def read_collection_data_from_file(expected_supply: int, slug: str) -> list[Toke
                     len(tokens_data),
                     expected_supply,
                 )
+            non_null_tokens = 0
             if len(tokens_data) > 0:
                 for token_data in tokens_data:
-                    assert token_data["metadata_dict"]
-                    tokens.append(Token.from_dict(token_data))
+                    if token_data["metadata_dict"]:
+                        non_null_tokens += 1
+                        tokens.append(Token.from_dict(token_data))
+            null_tokens = len(tokens_data) - non_null_tokens
+            if null_tokens:
+                msg = (
+                    f"Warning: Data cache file had empty metadata for {null_tokens} "
+                    "tokens. This is expected if those tokens are burned or "
+                    "unrevealed. However, they are not taken into account into "
+                    "rarity. Please check the cache file for errors."
+                )
+                logger.warning(msg)
+                print(msg)
         logger.debug(f"Read {len(tokens)} tokens from cache file: {cache_filename}")
     except FileNotFoundError:
         logger.warning(f"No opensea cache file found for {slug}: {cache_filename}")

tests/resolver/test_rarity_sniffer.py

@@ -1,10 +1,16 @@
+import pytest
+
 from open_rarity.resolver.rarity_providers.rank_resolver import RankResolver
 from open_rarity.resolver.rarity_providers.rarity_sniffer import RaritySnifferResolver
 
 
 class TestRaritySnifferResolver:
     BORED_APE_COLLECTION_ADDRESS = "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d"
 
+    @pytest.mark.skipif(
+        "not config.getoption('--run-resolvers')",
+        reason="This just verifies external APIs but should not block main library",
+    )
     def test_get_all_ranks(self):
         token_id_to_ranks = RaritySnifferResolver.get_all_ranks(
             contract_address=self.BORED_APE_COLLECTION_ADDRESS