# pywinauto.tests.comboboxdroppedheight 組合框下降高度測試 > **What is checked** 確保組合框落下時顯示的列表的高度不小于參考的高度。 > **How is it checked** 可以從窗口中檢索已刪除矩形的值。 計算此矩形的高度并與參考高度進行比較。 > **When is a bug reported** 如果要檢查的組合框的丟棄矩形的高度小于參考組合的高度，則報告錯誤。 > > **Bug Extra Information** There is no extra information associated with this bug type > > **Is Reference dialog needed** The reference dialog is necessary for this test. > > **False positive bug reports** No false bugs should be reported. If the font of the localised control has a smaller height than the reference then it is possible that the dropped rectangle could be of a different size. > > **Test Identifier** The identifier for this test/bug is “ComboBoxDroppedHeight” > > `pywinauto.tests.comboboxdroppedheight.``ComboBoxDroppedHeightTest`(*windows*)[?](https://pywinauto.readthedocs.io/en/latest/code/pywinauto.tests.comboboxdroppedheight.html#pywinauto.tests.comboboxdroppedheight.ComboBoxDroppedHeightTest "Permalink to this definition") > > Check if each combobox height is the same as the reference