Fixup: Avoid helper_test.go files

go/runtime/bundle/registry_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"os"
 	"path/filepath"
+	"slices"
 	"strings"
 	"testing"
 
@@ -15,6 +16,52 @@ import (
 	"github.com/oasisprotocol/oasis-core/go/runtime/bundle/component"
 )
 
+func createSyntheticBundle(dir string, runtimeID common.Namespace, version version.Version, components []component.Kind) (string, error) {
+	manifest := &Manifest{
+		Name:       "test-runtime",
+		ID:         runtimeID,
+		Components: make([]*Component, 0),
+	}
+
+	for _, comp := range components {
+		switch comp {
+		case component.RONL:
+			manifest.Components = append(manifest.Components, &Component{
+				Kind:    component.RONL,
+				Version: version,
+				ELF: &ELFMetadata{
+					Executable: "runtime.bin",
+				},
+			})
+		case component.ROFL:
+			manifest.Components = append(manifest.Components, &Component{
+				Kind:    component.ROFL,
+				Version: version,
+			})
+		default:
+		}
+	}
+
+	bnd := &Bundle{
+		Manifest: manifest,
+	}
+
+	if slices.Contains(components, component.RONL) {
+		if err := bnd.Add(manifest.Components[0].ELF.Executable, NewBytesData([]byte{1})); err != nil {
+			return "", err
+		}
+	}
+
+	bnd.manifestHash = manifest.Hash()
+	path := filepath.Join(dir, bnd.GenerateFilename())
+
+	if err := bnd.Write(path); err != nil {
+		return "", err
+	}
+
+	return path, nil
+}
+
 func TestBundleRegistry(t *testing.T) {
 	// Prepare a temporary directory for storing bundles.
 	dir := t.TempDir()