java


how to mock the class cast ServletRequest to HttpServletRequest?


here is my code ,
public void doFilter(ServletRequest req, ServletResponse res, FilterChain filterChain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) req;
HttpServletResponse response = (HttpServletResponse) res;
HttpSession session = request.getSession(false);
}
request is use to be null. how to mock this lines ?
You should create mocks of HttpServletRequest and HttpServletResponse, like following:
#Test
public void testDoFilter() throws Exception {
HttpServletRequest request = mock(HttpServletRequest.class);
HttpServletResponse response = mock(HttpServletResponse.class);
FilterChain filterChain = mock(FilterChain.class);
Handler handler = new Handler();
handler.doFilter(request, response, filterChain);
verify(request).getSession(false);
// other assertions
}

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