mockRequest.setHeader("Origin", null);

        corsFilter.doFilter(mockRequest, mockResponse, mockFilterChain);

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

    // Test with blank Origin header
    @Test
    public void test_doFilter_blankOriginHeader() throws IOException, ServletException {
        mockRequest.setHeader("Origin", "");