@Test
public void loadAssets() {

    ((SettingsScenarioSimulationDropdown) assetsDropdown).loadAssets(LOWER_CASE_VALUE);
    /* Can't directly call super.loadAssets() method, so here it verifies clear() and
       initialize() method which represents the body of super.loadAssets() method   */
    verify(assetsDropdown, times(1)).clear();
    verify(assetsDropdown, times(1)).initializeDropdown();
    assertEquals(((SettingsScenarioSimulationDropdown) assetsDropdown).currentValue, LOWER_CASE_VALUE);
}