#1543 tests to check if cache key length influence caching behavior.

tests/unit/test_services/test_cache/test_in_memory_cache.py

@@ -1,8 +1,41 @@
+import logging
+
+import pytest
+
 from cdisc_rules_engine.services.cache.in_memory_cache_service import (
     InMemoryCacheService,
 )
 
 
+def test_cache_key_exceeds_max_size():
+    cache = InMemoryCacheService(max_size=56)
+    cache.add("key" * 10000, "test data")
+
+    assert cache.exists("key" * 10000)
+
+
+@pytest.mark.skip(reason="Demo test to show value too large scenario")
+def test_demo_raises_when_data_becomes_bigger_after_check(monkeypatch, caplog):
+    cache = InMemoryCacheService(max_size=56)
+    original_setitem = cache.cache.__setitem__
+
+    def exploding_setitem(self, key, value):
+        value = value + value
+        original_setitem(key, value)
+
+    monkeypatch.setattr(
+        cache.cache.__class__,
+        "__setitem__",
+        exploding_setitem,
+    )
+    with caplog.at_level(logging.WARNING):
+        cache.add("test", "test data")
+
+    assert "Failed to add result to cache for key 'test'" in caplog.text
+    assert "value too large" in caplog.text
+    assert "test" not in cache.cache
+
+
 def test_cache_value_exceeds_max_size():
     cache = InMemoryCacheService(max_size=1)
     cache.add("test", "this is a test")