### Question:
PopupHelper implements HasBusyIndicator { public void showInformationPopup(final String message) { showNotificationPopup(CommonConstants.INSTANCE.Information(), message); } @Inject  PopupHelper(final ErrorPopup errorPopup); void showInformationPopup(final String message); void showErrorPopup(final String message); void showErrorPopup(final String message,
                               final String detail); void showYesNoPopup(final String title,
                               final String message,
                               final Command yesCommand,
                               final Command noCommand); @Override void showBusyIndicator(final String message); @Override void hideBusyIndicator(); ErrorCallback<Message> getPopupErrorCallback();  }### Answer:
@Test public void testShowInformationPopup() { popupHelper.showInformationPopup(MESSAGE); verify(popupHelper, times(1)).newNotificationPopup(CommonConstants.INSTANCE.Information(), MESSAGE); verifyPopupWasShown(yesNoCancelPopup); }