feat(Core): support partial graph execution

tests/execution/testing_nodes/testing-pack/cache_provider_test_nodes.py

@@ -0,0 +1,51 @@
+from comfy.comfy_types.node_typing import ComfyNodeABC
+from comfy_api.latest._caching import CacheProvider
+from comfy_execution.cache_provider import register_cache_provider
+
+
+class _RecordingCacheProvider(CacheProvider):
+    """Records the class types of every externally stored cache entry so tests
+    can assert that failed or failure-blocked outputs never leave the process."""
+
+    def __init__(self):
+        self.stored_class_types = []
+
+    async def on_lookup(self, context):
+        return None
+
+    async def on_store(self, context, value):
+        self.stored_class_types.append(context.class_type)
+
+
+RECORDING_CACHE_PROVIDER = _RecordingCacheProvider()
+register_cache_provider(RECORDING_CACHE_PROVIDER)
+
+
+class TestCacheProviderRecord(ComfyNodeABC):
+    """Reports which node class types have been stored through the external
+    cache provider interface since the server started."""
+
+    @classmethod
+    def INPUT_TYPES(cls):
+        return {"required": {}}
+
+    @classmethod
+    def IS_CHANGED(cls):
+        return float("NaN")
+
+    RETURN_TYPES = ()
+    OUTPUT_NODE = True
+    FUNCTION = "report"
+    CATEGORY = "Testing/Nodes"
+
+    def report(self):
+        return {"ui": {"stored_class_types": list(RECORDING_CACHE_PROVIDER.stored_class_types)}}
+
+
+CACHE_PROVIDER_TEST_NODE_CLASS_MAPPINGS = {
+    "TestCacheProviderRecord": TestCacheProviderRecord,
+}
+
+CACHE_PROVIDER_TEST_NODE_DISPLAY_NAME_MAPPINGS = {
+    "TestCacheProviderRecord": "Test Cache Provider Record",
+}