@Test
public void get_unexistingColumn_returnsDefaultVisibilityAndStoresDefaultVisibility() {

    assertEquals(DEFAULT_COLUMN_VISIBILITY, helper.getColumnVisibility("appId", "ns", "kind", "col"));
    // we assert that getting a non-exiting column writes the default value to the store
    String key = COLUMN_VISIBILITY_CONFIG + "$appId$ns$kind$col";
    String item = storage.getItem(key);
    assertEquals(DEFAULT_COLUMN_VISIBILITY, Boolean.valueOf(item));
}