The gate's row: a merged message with no trees is read and refused by nothing (issue 1367; passes with the group's mesh-sdk pin)

modules/mesh-delivery-gate/cmd/mesh-delivery-gate/holder_test.go

@@ -5,6 +5,8 @@ import (
 	"strings"
 	"testing"
 	"time"
+
+	sdk "git.novox.be/novox/mesh-sdk/go/delivery"
 )
 
 // The holder, end to end over fakes (novox/hq ADR 0239 *How it is checked*, cut by ADR 0539 §17): a pull request's head
@@ -238,6 +240,17 @@ func TestAMergedGroupEndsMergedWithSourceMainMoved(t *testing.T) {
 	if w.source.main == nil || w.source.main.Heads["novox/a"] != strings.Repeat("p", 12) || w.source.main.Heads["novox/b"] != strings.Repeat("q", 12) {
 		t.Fatalf("source.main is %+v, wanted both merges", w.source.main)
 	}
+	// A merge that leaves no module.json carries no trees (issue 1367): the gate reads it, and refuses nothing.
+	msg := sdk.Forge{Kind: sdk.ForgeMerged, Repository: "novox/a", Number: 9, Head: strings.Repeat("e", 40),
+		Merge: strings.Repeat("f", 40), Root: "r"}
+	body, err := sdk.EncodeForge(msg)
+	if err != nil {
+		t.Fatalf("a merged message with no trees is refused: %v", err)
+	}
+	w.h.Forged("mesh-delivery-forge-bridge.novox.a.merged", body)
+	if len(w.h.refusals) != 0 {
+		t.Errorf("the gate refused a merged message with no trees: %v", w.h.refusals)
+	}
 }
 
 // ADR 0419 §2, issue 978: a description's `after:` line is not read, and says so once on its pull request. The