test(cache): test litellm DualCache in-memory operations and cache misses

tests/test_budget_tracker_bounds.py

@@ -1,30 +1,13 @@
-\"\"\"
-Unit tests for user and team budget tracking arithmetic and threshold evaluation in LiteLLM proxy.
-\"\"\"
 import pytest
-from typing import Dict, Any
+from litellm.caching.caching import DualCache
 
-def test_spend_threshold_exceeded():
-    max_budget = 100.0
-    current_spend = 95.50
-    incoming_cost = 5.00
-    
-    projected_spend = current_spend + incoming_cost
-    is_exceeded = projected_spend > max_budget
-    assert is_exceeded is True
-    assert round(projected_spend, 2) == 100.50
+def test_dual_cache_in_memory_set_get():
+    cache = DualCache(in_memory_cache=True)
+    cache.set_cache(key="user_spend_123", value=45.50, ttl=300)
+    cached_val = cache.get_cache(key="user_spend_123")
+    assert cached_val == 45.50
 
-def test_spend_threshold_within_limit():
-    max_budget = 50.0
-    current_spend = 20.0
-    incoming_cost = 12.50
-    
-    projected_spend = current_spend + incoming_cost
-    is_exceeded = projected_spend > max_budget
-    assert is_exceeded is False
-    assert projected_spend == 32.50
-
-def test_daily_budget_reset_calculation():
-    budget_duration = "1d"
-    seconds_in_day = 86400
-    assert seconds_in_day == 24 * 60 * 60
+def test_dual_cache_miss():
+    cache = DualCache(in_memory_cache=True)
+    val = cache.get_cache(key="non_existent_key_xyz")
+    assert val is None