### Question:
DropDownTextField extends JTextField implements GComponent { public void setSelectedValue(T value) { storeSelectedValue(value); if (value != null) { setText(dataModel.getDisplayText(value)); setToolTipText(dataModel.getDescription(value)); } else { setText(""); setToolTipText(""); } } DropDownTextField(DropDownTextFieldDataModel<T> dataModel);  DropDownTextField(DropDownTextFieldDataModel<T> dataModel, int updateMinDelay); @Override void setText(String text); boolean isMatchingListShowing(); void setConsumeEnterKeyPress(boolean consume); void setIgnoreEnterKeyPress(boolean ignore); void setMatchingWindowHeight(int height); void addDropDownSelectionChoiceListener(DropDownSelectionChoiceListener<T> listener); void addCellEditorListener(CellEditorListener listener); void removeCellEditorListener(CellEditorListener listener); T getSelectedValue(); void setSelectedValue(T value); void closeDropDownWindow();  }### Answer:
@Test public void testSetSelectedValue_EmptyField() { setSelectedValue("d1"); assertTextFieldText("d1"); assertSelectedValue("d1"); }
@Test public void testSetSelectedValue_TextInField_NoItemSelected() { typeText("zombie", false); String newValue = "zed"; setSelectedValue(newValue); assertTextFieldText(newValue); assertSelectedValue(newValue); }
@Test public void testSetSelectedValue_TextInField_MatchingWindowOpen() { typeText("d1", true); setSelectedValue("a2"); assertMatchingWindowHidden(); assertTextFieldText("a2"); assertSelectedValue("a2"); }