assertEquals("original query", result);
    }

    @Test
    public void test_regenerateQuery_exception_returnsFailedQuery() {
        client.setChatResponse(null); // causes LlmException

        final String result = client.regenerateQuery("test question", "original query", "no_results", Collections.emptyList());

        assertEquals("original query", result);

            List<String> nodeTrail = new ArrayList<>(trail.size() + 1);
            nodeTrail.addAll(trail);
            nodeTrail.add(artifact.getId());

            if (filter == null || filter.accept(node, Collections.emptyList())) {
                artifact.setDependencyTrail(nodeTrail);
                artifacts.add(artifact);
            }

            toArtifacts(artifacts, node.getChildren(), nodeTrail, filter);
        }
    }

            return java.util.Collections.emptyList();
        }

        @Override
        public java.util.List<jakarta.mail.Address> getSavedBccList() {
            return java.util.Collections.emptyList();
        }

        @Override
        public java.util.List<jakarta.mail.Address> getSavedCcList() {
            return java.util.Collections.emptyList();
        }

        @Override

        Project project;
        Artifact rootArtifact;
        DependencyCoordinates root;
        List<DependencyCoordinates> dependencies = Collections.emptyList();
        List<DependencyCoordinates> managedDependencies = Collections.emptyList();
        boolean verbose;
        PathScope pathScope;
        Predicate<PathType> pathTypeFilter;
        Version targetVersion;

        this.readings = readings;
        this.fields = fields;
        if (tags == null) {
            this.tags = Collections.emptyList();
        } else {
            this.tags = tags;
        }
        if (roles == null) {
            this.roles = Collections.emptyList();
        } else {
            this.roles = roles;
        }
    }

    /**
     * Returns the elevate word.
     *

    public ResolutionNode(Artifact artifact, List<ArtifactRepository> remoteRepositories) {
        this.artifact = artifact;
        this.remoteRepositories = remoteRepositories;
        depth = 0;
        parents = Collections.emptyList();
        parent = null;
    }

    public ResolutionNode(Artifact artifact, List<ArtifactRepository> remoteRepositories, ResolutionNode parent) {
        this.artifact = artifact;

        String word = "empty lists";
        float boost = 1.0f;
        List<String> readings = Collections.emptyList();
        List<String> fields = Collections.emptyList();
        List<String> tags = Collections.emptyList();
        List<String> roles = Collections.emptyList();

        elevateWord = new ElevateWord(word, boost, readings, fields, tags, roles);

        final MockSearchRequestParams params = new MockSearchRequestParams();
        final LocalDateTime now = LocalDateTime.now();
        final QueryResponseList queryResponseList = new QueryResponseList(Collections.emptyList(), 0L, "eq", 0L, false, null, 0, 10, 0);

        searchLogHelper.createSearchLog(params, now, "test-query-id", "test query", 0, 10, queryResponseList, context);

            @Override
            public java.util.List<LaScheduledJob> getJobList() {
                return Collections.emptyList();
            }

            @Override
            public java.util.List<org.lastaflute.job.LaJobHistory> searchJobHistoryList() {
                return Collections.emptyList();
            }

            @Override
            public void reboot() {
            }

    }

    private void parseResponseHeaderConfig(final String value) {
        if (StringUtil.isBlank(value)) {
            defaultResponseHeaders = Collections.emptyList();
            return;
        }

        StreamUtil.split(value, "\n").of(stream -> stream.filter(StringUtil::isNotBlank).forEach(s -> {
            final String[] values = StringUtils.split(s, "=", 2);