try {
            webApiFilter.doFilter(request, response, chain);
            fail("Expected ServletException");
        } catch (IOException e) {
            fail("Unexpected IOException: " + e.getMessage());
        } catch (ServletException e) {
            assertEquals("Test ServletException", e.getMessage());
        }
    }

    // Test doFilter when chain.doFilter throws IOException
    @Test

        mockRequest.setRequestURI("/search");
        testableFilter.doFilter(mockRequest, mockResponse, mockFilterChain);
        assertFalse(mockFilterChain.wasDoFilterCalled());
        assertEquals(429, mockResponse.getSendErrorCode());

        resetMocks();
        mockRequest.setRequestURI("/api/v1/search");
        testableFilter.doFilter(mockRequest, mockResponse, mockFilterChain);

    }

    // Test with no Origin header
    @Test
    public void test_doFilter_noOriginHeader() throws IOException, ServletException {
        mockRequest.setHeader("Origin", null);

        corsFilter.doFilter(mockRequest, mockResponse, mockFilterChain);

        assertTrue(mockFilterChain.wasDoFilterCalled());
        assertFalse(corsHandlerFactory.wasGetCalled());
    }

    // Test with blank Origin header
    @Test

            response.getWriter().write("Complex response");
            chain.doFilter(request, response);
        }
    }

    // Test helper classes

    private static class TestFilterChain implements FilterChain {
        private boolean doFilterCalled = false;

        @Override
        public void doFilter(ServletRequest request, ServletResponse response) throws IOException, ServletException {