Test the gate's handing end to end: snapshot, store, and the composition either side (issue 969)

cmd/mesh-controller/merge_gate_handing_test.go

@@ -1,10 +1,13 @@
 package main
 
 import (
+	"os"
 	"testing"
 	"time"
 
+	"github.com/novox/mesh-controller/internal/catalogue"
 	snapshot "github.com/novox/mesh-controller/internal/facts"
+	"github.com/novox/mesh-controller/internal/inventory"
 	"github.com/novox/mesh-controller/internal/link"
 )
 
@@ -26,3 +29,57 @@ func TestIssue969TheGateGivesAMachineItsContractSoItTakesHandedFiles(t *testing.
 		t.Fatalf("a snapshot that carries no contract states nothing: %+v, %v", none, ok)
 	}
 }
+
+// Issue 969, through the store: a machine whose engine stated the handed contract is in the snapshot with it, the
+// gate raises it as taking handed files, and one whose statement is below it is raised as not taking them. Run in
+// the merge check with the other tests that need a store; the composition itself, handed here and refused there, is
+// the catalogue's TestAHandedModuleNamingARunTimeBoundKeyComposesOnlyWhereItIsHanded.
+func TestIssue969TheGateRaisesEachMachineAsItsEngineStatedItself(t *testing.T) {
+	open := aMesh(t)
+	ctx := t.Context()
+	said := time.Date(2026, 10, 16, 12, 0, 0, 0, time.UTC)
+	for node, contract := range map[string]int{"anchor": link.HandedContract, "laptop": link.HandedContract - 1} {
+		if _, err := open.inventory.RecordHealth(ctx, inventory.NodeHealth{Node: node, Contract: contract,
+			SaidAt: said, HeardAt: said}); err != nil {
+			t.Fatal(err)
+		}
+	}
+	f, err := gatherFacts(ctx, open, "2.11.17")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(f.Machines) != 2 {
+		t.Fatalf("the snapshot holds %d machines", len(f.Machines))
+	}
+	want := map[string]bool{}
+	for _, m := range f.Machines {
+		if m.Contract == 0 {
+			t.Fatalf("%s: the snapshot carries no contract", m.Name)
+		}
+		want[m.Name] = m.Contract >= link.HandedContract
+	}
+	handing := 0
+	for _, hands := range want {
+		if hands {
+			handing++
+		}
+	}
+	if handing != 1 {
+		t.Fatalf("one machine takes handed files in the snapshot, got %v", want)
+	}
+
+	raised, drop, err := throwawayStores(ctx, os.Getenv("MESH_TEST_POSTGRES"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer drop()
+	if _, err := raiseFromFacts(ctx, raised, f, map[string]catalogue.Manifest{}, map[string]inventory.Source{}); err != nil {
+		t.Fatal(err)
+	}
+	for name, hands := range want {
+		got, err := engineTakesHanded(ctx, raised.inventory, name)
+		if err != nil || got != hands {
+			t.Errorf("%s: the gate raises it as taking handed files = %v (%v), the mesh says %v", name, got, err, hands)
+		}
+	}
+}