code: def test_combobox():
      cb = pg.ComboBox()
      items = {"a": 1, "b": 2, "c": 3}
      cb.setItems(items)
      cb.setValue(2)
      assert str(cb.currentText()) == "b"
      assert cb.value() == 2
  
      # Clear item list; value should be None
      cb.clear()
      assert cb.value() is None
  
      # Reset item list; value should be set automatically
      cb.setItems(items)
      assert cb.value() == 2
  
      # Clear item list; repopulate with same names and new values
      items = {"a": 4, "b": 5, "c": 6}
      cb.clear()
      cb.setItems(items)
      assert cb.value() == 5
  
      # Set list instead of dict
      cb.setItems(list(items.keys()))
      assert str(cb.currentText()) == "b"
  
      cb.setValue("c")
      assert cb.value() == str(cb.currentText())
      assert cb.value() == "c"
  
      cb.setItemValue("c", 7)
      assert cb.value() == 7
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_combobox() without return types