@Test
    //assert that HttpServletResponse.sendError() is called when X-Requested-With is required but not present 
    public void testDoFilterRequestedWithTrue() {
        
        mirthProperties.setProperty("server.api.require-requested-with", "true");
        RequestedWithFilter.configure(mirthProperties);

        ContainerRequestContext mockCtx = Mockito.mock(ContainerRequestContext.class);
        when(mockCtx.getHeaders()).thenReturn(new javax.ws.rs.core.MultivaluedHashMap<String, String>());

        try {
            RequestedWithFilter filter = new RequestedWithFilter();
            filter.filter(mockCtx);
            ArgumentCaptor<Response> responseCaptor = 
                ArgumentCaptor.forClass(Response.class);
            verify(mockCtx).abortWith(responseCaptor.capture());
            Response response = responseCaptor.getValue();
            assertEquals(400, response.getStatus());
            assertEquals("All requests must have 'X-Requested-With' header", response.getEntity());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    @Test
    //assert that HttpServletResponse.sendError() is NOT called when X-Requested-With is not required and not present 
    public void testDoFilterRequestedWithFalse() {
        
        mirthProperties.setProperty("server.api.require-requested-with", "false");
        RequestedWithFilter.configure(mirthProperties);

        ContainerRequestContext mockCtx = Mockito.mock(ContainerRequestContext.class);
        when(mockCtx.getHeaders()).thenReturn(new javax.ws.rs.core.MultivaluedHashMap<String, String>());

        try {
            RequestedWithFilter filter = new RequestedWithFilter();
            filter.filter(mockCtx);
            verify(mockCtx, never()).abortWith(ArgumentMatchers.any(javax.ws.rs.core.Response.class));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }