🚀 feat(test_process.py): add tests for loading langchain object with and without cached session

🐛 fix(test_process.py): import missing functions and modules to fix test failures

tests/test_process.py

@@ -1,4 +1,5 @@
-from langflow.processing.process import process_tweaks
+from langflow.interface.run import build_sorted_vertices_with_caching
+from langflow.processing.process import load_langchain_object, process_tweaks
 
 
 def test_no_tweaks():
@@ -194,3 +195,54 @@ def test_tweak_not_in_template():
     tweaks = {"node1": {"param3": 5}}
     result = process_tweaks(graph_data, tweaks)
     assert result == graph_data
+
+
+def test_load_langchain_object_with_cached_session(client, basic_graph_data):
+    # Build the langchain_object once and get the session_id
+    langchain_object1, artifacts1, session_id1 = load_langchain_object(
+        basic_graph_data, None
+    )
+    # Use the same session_id to get the langchain_object again
+    langchain_object2, artifacts2, session_id2 = load_langchain_object(
+        basic_graph_data, session_id1
+    )
+
+    assert session_id1 == session_id2
+    assert id(langchain_object1) == id(langchain_object2)
+    assert artifacts1 == artifacts2
+
+
+def test_load_langchain_object_with_no_cached_session(client, basic_graph_data):
+    # Provide a non-existent session_id
+    langchain_object1, artifacts1, session_id1 = load_langchain_object(
+        basic_graph_data, "non_existent_session"
+    )
+    # Clear the cache
+    build_sorted_vertices_with_caching.clear_cache()
+    # Use the new session_id to get the langchain_object again
+    langchain_object2, artifacts2, session_id2 = load_langchain_object(
+        basic_graph_data, session_id1
+    )
+
+    assert session_id1 == session_id2
+    assert id(langchain_object1) != id(
+        langchain_object2
+    )  # Since the cache was cleared, objects should be different
+
+
+def test_load_langchain_object_without_session_id(client, basic_graph_data):
+    # Build the langchain_object without providing a session_id
+    langchain_object1, artifacts1, session_id1 = load_langchain_object(
+        basic_graph_data, None
+    )
+    # Build the langchain_object again without providing a session_id
+    langchain_object2, artifacts2, session_id2 = load_langchain_object(
+        basic_graph_data, None
+    )
+
+    assert session_id1 == session_id2
+
+    assert id(langchain_object1) == id(
+        langchain_object2
+    )  # Since no session_id was provided, the hash will be based on the graph_data
+    assert artifacts1 == artifacts2