### Question:
AbstractComboBoxFieldRenderer extends SelectorFieldRenderer<T, StringSelectorOption, String> { @Override protected void setReadOnly(boolean readOnly) { view.setReadOnly(readOnly); field.setReadOnly(readOnly); } @Inject  AbstractComboBoxFieldRenderer(final ComboBoxWidgetView comboBoxEditor, final ClientTranslationService translationService);   }### Answer:
@Test public void setReadOnly() throws Exception { comboBoxFieldRenderer.setReadOnly(true); verify(comboBoxWidgetView, times(1)).setReadOnly(true); }