Starting a running flow restarts its nodes, so interval and cron Injects keep firing; a params-dict node is told settings arrive by name

backend/tests/flow/test_node_settings.py

@@ -9,7 +9,7 @@ from pathlib import Path
 
 import pytest
 
-from fluksio.flow.controller import FlowController, follow_header
+from fluksio.flow.controller import FlowController, _signature_gap, follow_header
 from fluksio.flow.messages import DType, MessageSpec
 from fluksio.flow.pipeline import Pipeline
 from fluksio.flow.schemas import FlowDef, NodeDef
@@ -226,3 +226,13 @@ def test_a_header_it_cannot_read_for_certain_leaves_the_node():
         "def run(value): pass\n",
     ):
         assert follow_header(node, code) == node
+
+
+def test_code_written_for_the_params_dict_is_told_settings_arrive_by_name():
+    gap = _signature_gap("def process(a, params): pass\n", "n", {"a"}, {"target"})
+
+    assert gap is not None
+    assert "process(..., target)" in gap
+    assert (
+        _signature_gap("def process(a, target): pass\n", "n", {"a"}, {"target"}) is None
+    )