Review of L2: the export is a placement file at its version with its modules (S1); a node asks the vault only when a module placed on it declares an own secret, so one with none composes whether or not the vault answers (H8's failure) (issue 1126)

go/cmd/placement-seed/main_test.go

@@ -1,11 +1,14 @@
 package main
 
 import (
+	"encoding/json"
 	"os"
 	"path/filepath"
 	"strings"
 	"testing"
 
+	"git.novox.be/novox/mesh-sdk/go/compose"
+	"git.novox.be/novox/mesh-sdk/go/compose/frombus"
 	"git.novox.be/novox/mesh-sdk/go/delivery"
 )
 
@@ -39,6 +42,17 @@ func TestTheSeedWritesEachNodesPlacementFileOnce(t *testing.T) {
 	if entries, _ := os.ReadDir(filepath.Join(other, "placement")); len(entries) != 0 {
 		t.Errorf("a refused export wrote %v", entries)
 	}
+	// What the controller's placement-export prints, frombus.Export per node, is what the seed takes: a node with no
+	// module placed included.
+	in := compose.Input{Nodes: []compose.Node{{Name: "solo", Place: compose.Place{Hub: true, Address: "10.77.0.9"}}}}
+	exported, err := frombus.Export(in, "solo")
+	if err != nil {
+		t.Fatal(err)
+	}
+	answer, _ := json.Marshal(map[string]any{"answer": map[string]delivery.Placement{"solo": exported}})
+	if written, err := Seed(strings.NewReader(string(answer)), t.TempDir()); err != nil || len(written) != 1 {
+		t.Errorf("Export's answer %s was not seeded: %v, %v", answer, written, err)
+	}
 	for _, bad := range []string{`[]`, `{}`, `{"ace":{"v":1,"node":"novox","modules":[]}}`} {
 		if _, err := Seed(strings.NewReader(bad), t.TempDir()); err == nil {
 			t.Errorf("%s was seeded", bad)