A walk let go behind another reads as a wait: its note on the line, never late, and no tier of it watched (hq ADR 0276 review of #200)

cmd/mesh-controller/batches_test.go

@@ -624,6 +624,20 @@ func TestAWalkLetGoBesideAStartedOneStartsOnceItEnded(t *testing.T) {
 	if len(*asked) != before || !strings.Contains(got.Note, "starts once "+started[0].ID) {
 		t.Fatalf("a walk let go beside a started one asked (%d → %d) or does not say it waits: %q", before, len(*asked), got.Note)
 	}
+	// Read as a wait, an hour on: its note on the line, never LATE, and no tier of it late for S3.
+	later := time.Now().Add(time.Hour)
+	if line := planLine(got, later); !strings.Contains(line, "starts once "+started[0].ID) || strings.Contains(line, "LATE") {
+		t.Fatalf("a deferred walk reads %q", line)
+	}
+	facts, _, err := gatherPlans(ctx, open.inventory, later, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, f := range facts {
+		if f.id == got.ID {
+			t.Fatalf("a deferred walk is watched as a tier running late: %+v", f)
+		}
+	}
 	done := started[0]
 	done.State = inventory.PlanDone
 	if err := open.inventory.SavePlan(ctx, &done); err != nil {