change[langgraph]: clean up Interrupt interface for v1 (#5405)

libs/langgraph/tests/test_interrupt_migration.py

@@ -0,0 +1,50 @@
+import warnings
+
+import pytest
+
+from langgraph.checkpoint.serde.jsonplus import JsonPlusSerializer
+from langgraph.types import Interrupt
+from langgraph.warnings import LangGraphDeprecatedSinceV10
+
+
+@pytest.mark.filterwarnings("ignore:LangGraphDeprecatedSinceV10")
+def test_interrupt_legacy_ns() -> None:
+    with warnings.catch_warnings():
+        warnings.filterwarnings("ignore", category=LangGraphDeprecatedSinceV10)
+
+        old_interrupt = Interrupt(
+            value="abc", resumable=True, when="during", ns=["a:b", "c:d"]
+        )
+
+        new_interrupt = Interrupt.from_ns(value="abc", ns="a:b|c:d")
+        assert new_interrupt.value == old_interrupt.value
+        assert new_interrupt.id == old_interrupt.id
+
+
+serializer = JsonPlusSerializer()
+
+
+def test_serialization_roundtrip() -> None:
+    """Test that the legacy interrupt (pre v1) can be reserialized as the modern interrupt without id corruption."""
+
+    # generated with:
+    # JsonPlusSerializer().dumps(Interrupt(value="legacy_test", ns=["legacy_test"], resumable=True, when="during"))
+    legacy_interrupt_bytes = b'{"lc": 2, "type": "constructor", "id": ["langgraph", "types", "Interrupt"], "kwargs": {"value": "legacy_test", "resumable": true, "ns": ["legacy_test"], "when": "during"}}'
+    legacy_interrupt_id = "f1fa625689ec006a5b32b76863e22a6c"
+
+    interrupt = serializer.loads(legacy_interrupt_bytes)
+    assert interrupt.id == legacy_interrupt_id
+    assert interrupt.value == "legacy_test"
+
+
+def test_serialization_roundtrip_complex_ns() -> None:
+    """Test that the legacy interrupt (pre v1), with a more complex ns can be reserialized as the modern interrupt without id corruption."""
+
+    # generated with:
+    # JsonPlusSerializer().dumps(Interrupt(value="legacy_test", ns=["legacy:test", "with:complex", "name:space"], resumable=True, when="during"))
+    legacy_interrupt_bytes = b'{"lc": 2, "type": "constructor", "id": ["langgraph", "types", "Interrupt"], "kwargs": {"value": "legacy_test", "resumable": true, "ns": ["legacy:test", "with:complex", "name:space"], "when": "during"}}'
+    legacy_interrupt_id = "e69356a9ee3630ee7f4f597f2693000c"
+
+    interrupt = serializer.loads(legacy_interrupt_bytes)
+    assert interrupt.id == legacy_interrupt_id
+    assert interrupt.value == "legacy_test"