Fence and reconcile module lifecycle effects

tests/test_recovery_runtime.py

@@ -50,7 +50,13 @@ def _identity(node: str, incarnation: str) -> RuntimeIdentity:
     )
 
 
-def _start(factory, identity, *, key: str = "build-1"):
+def _start(
+    factory,
+    identity,
+    *,
+    key: str = "build-1",
+    block_unresolved_resource: bool = False,
+):
     return begin_durable_recovery_operation(
         factory,
         identity=identity,
@@ -68,6 +74,7 @@ def _start(factory, identity, *, key: str = "build-1"):
         lease_resource_key="campaign:build:version-1",
         resource_type="campaign_version",
         resource_id="version-1",
+        block_unresolved_resource=block_unresolved_resource,
     )
 
 
@@ -273,6 +280,36 @@ def test_other_runtime_cannot_use_an_active_fence() -> None:
         engine.dispose()
 
 
+def test_unresolved_predecessor_can_block_new_effects_on_same_resource() -> None:
+    engine, factory = _fixture()
+    try:
+        started = _start(
+            factory,
+            _identity("worker-1", "incarnation-1"),
+            block_unresolved_resource=True,
+        )
+        assert started.operation is not None
+        started.operation.unresolved(
+            status=RecoveryStatus.OUTCOME_UNKNOWN,
+            summary="Provider outcome is unknown",
+            evidence={"request_sent": True},
+            failure_summary="Reconcile before retry",
+        )
+
+        with pytest.raises(
+            RecoveryOperationStateConflict,
+            match="outcome_unknown",
+        ):
+            _start(
+                factory,
+                _identity("worker-2", "incarnation-2"),
+                key="build-2",
+                block_unresolved_resource=True,
+            )
+    finally:
+        engine.dispose()
+
+
 def test_expired_crash_fence_is_taken_over_as_recovery_required() -> None:
     engine, factory = _fixture()
     try: