// Test constructor
    public void test_constructor() {
        assertNotNull(new WebApiFilter());
    }

    // Test init method
    public void test_init() throws ServletException {
        FilterConfig filterConfig = new FilterConfig() {
            @Override
            public String getFilterName() {
                return "testFilter";
            }

            @Override

import org.lastaflute.web.servlet.filter.RequestLoggingFilter;
import org.lastaflute.web.util.LaRequestUtil;
import org.lastaflute.web.util.LaResponseUtil;

import jakarta.annotation.PostConstruct;
import jakarta.servlet.FilterConfig;
import jakarta.servlet.ServletContext;
import jakarta.servlet.http.HttpServletResponse;

/**
 * SPNEGO (Security Provider Negotiation Protocol) authenticator implementation.
 *