1 files changed, 21 insertions, 0 deletions
diff --git a/internal/config/config_test.go b/internal/config/config_test.go
index 38c7604..e3af475 100644
--- a/internal/config/config_test.go
+++ b/internal/config/config_test.go
@@ -239,6 +239,27 @@ func TestSelectionFromINI(t *testing.T) {
 	}
 }
 
+func TestUseLayers(t *testing.T) {
+	dir := t.TempDir()
+	t.Setenv("LECTIO_CONFIG", filepath.Join(dir, "config.ini"))
+	os.WriteFile(filepath.Join(dir, "config.ini"), []byte("use = poland, krakow\n"), 0o644)
+	cfg, err := Load()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(cfg.Use) != 2 || cfg.Use[0] != "poland" || cfg.Use[1] != "krakow" {
+		t.Fatalf("Use = %v", cfg.Use)
+	}
+	// round-trips through Save
+	if err := Save(cfg); err != nil {
+		t.Fatal(err)
+	}
+	got, _ := Load()
+	if len(got.Use) != 2 || got.Use[1] != "krakow" {
+		t.Errorf("Use after round-trip = %v", got.Use)
+	}
+}
+
 func TestMigrateTOMLToINI(t *testing.T) {
 	dir := t.TempDir()
 	t.Setenv("XDG_CONFIG_HOME", dir)