Assemble imported sequence-item scopes

internal/engine/native_filesystem_test.go

@@ -42,6 +42,34 @@ items: {main: main}
 	}
 }
 
+func TestNativeFilesystemItemImportUsesSharedScopedAssembly(t *testing.T) {
+	t.Parallel()
+	type item struct {
+		ID   string `yaml:"id"`
+		Name string `yaml:"name"`
+	}
+	type config struct {
+		Items []item `yaml:"items"`
+	}
+	filesystem := fstest.MapFS{
+		"main.yml":           &fstest.MapFile{Data: []byte("configkit:\n  imports:\n    - path: records/item.yml\n      destination: [items]\n      placement: sequence-item\n")},
+		"records/item.yml":   &fstest.MapFile{Data: []byte("configkit:\n  imports:\n    - path: helper.yml\nid: native\n")},
+		"records/helper.yml": &fstest.MapFile{Data: []byte("name: helper\n")},
+	}
+	namespace := newNativeNamespace("bundle", filesystem)
+	result, err := testLoad[config](filesystemFile(namespace, "main.yml"), Options[config]{Imports: true})
+	if err != nil {
+		t.Fatalf("native item import: %v", err)
+	}
+	if len(result.Config.Items) != 1 || result.Config.Items[0].ID != "native" || result.Config.Items[0].Name != "helper" {
+		t.Fatalf("native item = %#v", result.Config.Items)
+	}
+	sources := result.Sources()
+	if len(sources) != 3 || sources[1].Destination.String() != "/items" || sources[2].Destination.String() != "/items/0" || sources[1].Path != "records/item.yml" || sources[2].Path != "records/helper.yml" {
+		t.Fatalf("native item sources = %#v", sources)
+	}
+}
+
 func TestNativeFilesystemNamespaceAndPathFailures(t *testing.T) {
 	first := fstest.MapFS{"main.yml": &fstest.MapFile{Data: []byte("items: {name: first}\n")}}
 	second := fstest.MapFS{"main.yml": &fstest.MapFile{Data: []byte("items: {name: second}\n")}}