}

    @Test
    @DisplayName("openConnection with null URL throws NullPointerException")
    void testOpenConnection_NullInput() {
        // Arrange
        Handler handler = newHandlerWith(mockCtx);

        // Act & Assert
        assertThrows(NullPointerException.class, () -> handler.openConnection(null), "Null URL should throw NPE");

        if (classpath == null || classpath.isEmpty()) {
            return null;
        }

        MetadataTreeNode tree = null;
        MetadataTreeNode parent = null;

        for (ArtifactMetadata md : classpath) {
            MetadataTreeNode node = new MetadataTreeNode(md, parent, md.isResolved(), md.getArtifactScope());
            if (tree == null) {
                tree = node;
            }

        if (project.getDependencyArtifacts() == null) {
            for (Dependency dependency : project.getDependencies()) {
                if (dependency.getGroupId() == null
                        || dependency.getGroupId().isEmpty()
                        || dependency.getArtifactId() == null
                        || dependency.getArtifactId().isEmpty()

        synchronized (Deferred.this) {
            if (response != null || error != null) {
                return;
            }
            response = r;

            executeCallbacks = new ArrayList<>(doneCallbacks.size());
            Consumer<RESPONSE> callback;
            while ((callback = doneCallbacks.poll()) != null) {
                executeCallbacks.add(callback);
            }
        }

        @Test
        @DisplayName("getBytes should handle null string")
        void testGetBytesWithNull() {
            // When
            byte[] result = Strings.getBytes(null, StandardCharsets.UTF_8);

            // Then
            assertNotNull(result, "Should return non-null array");
            assertEquals(0, result.length, "Should return empty array for null string");
        }

        @Test

            session.getMavenSession().getAllProjects().stream()
                    .flatMap(this::getProjectArtifacts)
                    .filter(a -> Objects.equals(id, id(a)))
                    .forEach(a -> a.setFile(path != null ? path.toFile() : null));
        }
        if (path == null) {
            paths.remove(id);
        } else {
            paths.put(id, path);
        }
    }

    /**

        return distributionName + " "
                + (version != null ? version : "<version unknown>")
                + (rev != null ? " (" + rev + ")" : "");
    }

    private static String reduce(String s) {
        return (s != null ? (s.startsWith("${") && s.endsWith("}") ? null : s) : null);
    }

    public static Properties getBuildProperties() {

            long id = 0;
            String line = null;
            while ((line = reader.readLine()) != null) {
                if (line.length() == 0 || line.charAt(0) == '#') {
                    if (updater != null) {
                        updater.write(line);
                    }
                    continue; // ignore empty lines and comments

                // Skip init() and directly test timeout handling
                org.codelibs.fess.crawler.client.AccessTimeoutTarget accessTimeoutTarget = null;
                org.codelibs.core.timer.TimeoutTask accessTimeoutTask = null;
                if (accessTimeout != null) {
                    accessTimeoutTarget = new org.codelibs.fess.crawler.client.AccessTimeoutTarget(Thread.currentThread());

                resp.flushBuffer();
                return null;
            }
            req.getSession().setAttribute("NtlmHttpAuth", ntlm);
        } else if (!skipAuthentication) {
            final HttpSession ssn = req.getSession(false);
            if (ssn == null || (ntlm = (NtlmPasswordAuthentication) ssn.getAttribute("NtlmHttpAuth")) == null) {
                resp.setHeader("WWW-Authenticate", "NTLM");