问题
I have a class which uses JSNI to retrieve JSON data stored in the host page:
protected native JsArray<JsonModel> getModels() /*-{
return $wnd.jsonData;
}-*/;
This method is called, and the data is then translated and process in a different method. How should I unit test this class, since I'm not able to instantiate (or seemingly mock?) JsArray?
What is the best way to unit test JSNI methods at all?
回答1:
The interface approach is the best approach, and not necessarily an overkill. As to the problem of actually testing the method - well, if it is just reading from $wnd.jsonData, there isn't any merit in testing the method. You are better off writing a server side test that confirms you have the right data in the host page.
If you really have some logic in a native method, you are better off writing a selenium/jsunit test case.
来源：https://stackoverflow.com/questions/2543462/gwt-best-practice-for-unit-testing-mocking-jsni-methods