[HiCache] fix unit test with changed new APIs (#13498)

python/sglang/srt/mem_cache/storage/mooncake_store/test_mooncake_store.py

@@ -29,6 +29,29 @@ def generate_batch_query_keys(kv_num: int, config: HiCacheStorageConfig):
     return set_keys, get_keys, exist_keys
 
 
+def create_mock_host_kv_cache(buffer_size, dtype=torch.float32):
+    """Create a mock HostKVCache-like object for testing."""
+    buffer = torch.randn(buffer_size, dtype=dtype)
+
+    class MockHostKVCache:
+        def __init__(self, buffer):
+            self.kv_buffer = buffer
+            self.layout = "page_first"
+            self.page_size = 1  # Simple page size for testing
+
+        def get_page_buffer_meta(self, indices):
+            """Mock implementation of get_page_buffer_meta."""
+            ptr_list = []
+            element_size_list = []
+            for idx in indices:
+                # Create mock pointers and sizes for each page
+                ptr_list.append(idx * self.page_size * self.kv_buffer.element_size())
+                element_size_list.append(self.page_size * self.kv_buffer.element_size())
+            return ptr_list, element_size_list
+
+    return MockHostKVCache(buffer), buffer
+
+
 def test_single_operation():
     """Test the set API with a single key-value pair."""
     print("=" * 100)
@@ -37,8 +60,11 @@ def test_single_operation():
     buffer_size = 1024 * 1024 * 16  # 16MB
     value_elements = 1024
     store = MooncakeStore()
-    buffer = torch.randn(buffer_size, dtype=torch.float32)
-    store.register_buffer(buffer)
+    mock_host_kv_cache, buffer = create_mock_host_kv_cache(buffer_size)
+
+    # Register the memory pool host - this is the proper workflow
+    store.register_mem_pool_host(mock_host_kv_cache)
+
     value_size = value_elements * buffer.element_size()
 
     key = str(uuid.uuid4())
@@ -75,8 +101,10 @@ def test_batch_operation(config: HiCacheStorageConfig):
     value_elements = 256
     kv_num = 13
     store = MooncakeStore(config)
-    buffer = torch.randn(buffer_size, dtype=torch.float32)
-    store.register_buffer(buffer)
+    mock_host_kv_cache, buffer = create_mock_host_kv_cache(buffer_size)
+
+    store.register_mem_pool_host(mock_host_kv_cache)
+
     value_size = value_elements * buffer.element_size()
 
     set_keys, get_keys, exist_keys = generate_batch_query_keys(kv_num, config)