[RadixTree][4/N Refactor]: Move available_and_evictable_str to individual radix cache classes (#17852)

test/registered/radix_cache/test_mamba_unittest.py

@@ -12,6 +12,7 @@ from sglang.srt.mem_cache.base_prefix_cache import (
     MatchPrefixParams,
 )
 from sglang.srt.mem_cache.cache_init_params import CacheInitParams
+from sglang.srt.mem_cache.common import available_and_evictable_str
 from sglang.srt.mem_cache.mamba_radix_cache import MambaRadixCache
 from sglang.srt.mem_cache.memory_pool import HybridLinearKVPool, HybridReqToTokenPool
 from sglang.srt.mem_cache.radix_cache import RadixKey
@@ -381,6 +382,10 @@ class TestMamba(unittest.TestCase):
             == mamba_pool.mamba_cache.temporal[:, last_node.mamba_value]
         )
 
+        print(tree.available_and_evictable_str())
+        print(available_and_evictable_str(tree))
+        tree.sanity_check()
+
 
 if __name__ == "__main__":
     unittest.main()

test/registered/radix_cache/test_radix_cache_unit.py

@@ -17,6 +17,7 @@ Usage:
     python -m pytest test_radix_cache_unit.py::TestRadixCache::test_insert_basic
 """
 
+from sglang.srt.mem_cache.common import available_and_evictable_str
 from sglang.test.ci.ci_register import register_amd_ci, register_cuda_ci
 
 # CPU-based unit test, runs quickly on any GPU runner
@@ -764,6 +765,14 @@ class TestRadixCache(unittest.TestCase):
         # The cache size should be within reasonable bounds of the actual allocated memory.
         self.assertLess(torch_allocated, cache_size_bytes * 2)
 
+    def test_available_and_evictable_str(self):
+        mock_allocator = unittest.mock.Mock()
+        mock_allocator.available_size.return_value = 10
+        cache: RadixCache = RadixCache.create_simulated(mock_allocator=mock_allocator)
+
+        print(cache.available_and_evictable_str())
+        print(available_and_evictable_str(cache))
+
 
 if __name__ == "__main__":
     unittest.main()

test/registered/radix_cache/test_swa_unittest.py

@@ -9,6 +9,7 @@ from sglang.srt.mem_cache.base_prefix_cache import (
     MatchPrefixParams,
 )
 from sglang.srt.mem_cache.cache_init_params import CacheInitParams
+from sglang.srt.mem_cache.common import available_and_evictable_str
 from sglang.srt.mem_cache.memory_pool import ReqToTokenPool
 from sglang.srt.mem_cache.radix_cache import RadixKey
 from sglang.srt.mem_cache.swa_memory_pool import SWAKVPool, SWATokenToKVPoolAllocator
@@ -231,6 +232,10 @@ class TestSWA(unittest.TestCase):
         self.assertEqual(last_node.key.token_ids[0], 60)
         self.assertEqual(last_node.key.token_ids[1], 70)
 
+        print(tree.available_and_evictable_str())
+        print(available_and_evictable_str(tree))
+        tree.sanity_check()
+
     def test_swa_radix_cache_eagle(self):
         # args
         req_size = 10