String message = "";
        PluginException exception = new PluginException(message);

        assertNotNull(exception);
        assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());
    }

    public void test_constructor_withMessageAndNullCause() {
        // Test constructor with message and null cause
        String message = "Plugin error with null cause";

        assertThat(traverser.isExistClass(DummyTest.class.getName()), is(true));
        assertThat(traverser.isExistClass(TestCase.class.getName()), is(not(true)));

        final Set<String> set = new HashSet<String>();
        traverser.forEach((ClassHandler) (packageName, shortClassName) -> set.add(ClassUtil.concatName(packageName, shortClassName)));
        assertThat(set.size() > 0, is(true));

                new TestStringSetGenerator() {
                  @Override
                  protected Set<String> create(String[] elements) {
                    Set<String> difference = newHashSet(elements);
                    Set<String> set = newHashSet(samples());
                    set.addAll(difference);
                    Set<String> subset = newHashSet(samples());
                    subset.removeAll(difference);

                  private final Comparator<String> comparator = NullsBeforeTwo.INSTANCE;

                  @Override
                  protected SortedMap<String, String> create(Entry<String, String>[] entries) {
                    SortedMap<String, String> map = new SafeTreeMap<>(comparator);
                    for (Entry<String, String> entry : entries) {

    @Required
    @Size(max = 100)
    public String docId;

    /**
     * The query ID associated with the search request.
     */
    @Required
    public String queryId;

    /**
     * The search query string for error page display.
     */
    public String q;

    /**
     * The number of search results per page for error page display.
     */
    public String num;

    /**

    /** accessType */
    protected String accessType;

    /** clientIp */
    protected String clientIp;

    /** hitCount */
    protected Long hitCount;

    /** hitCountRelation */
    protected String hitCountRelation;

    /** languages */
    protected String languages;

    /** queryId */
    protected String queryId;

    /** queryOffset */

     */
    public static class ContentTransformer implements Transformer {
        private final String name;
        private final Map<String, String> transformationRules = new HashMap<>();

        public ContentTransformer(String name) {
            this.name = name;
        }

        public void addTransformationRule(String pattern, String replacement) {
            transformationRules.put(pattern, replacement);
        }

     *
     * @return list of environment variable items
     */
    public static List<Map<String, String>> getEnvItems() {
        final List<Map<String, String>> itemList = new ArrayList<>();
        for (final Map.Entry<String, String> entry : System.getenv().entrySet()) {
            itemList.add(createItem(entry.getKey(), entry.getValue()));
        }
        return itemList;

    /** createdBy */
    protected String createdBy;

    /** createdTime */
    protected Long createdTime;

    /** suggestWord */
    protected String suggestWord;

    /** targetLabel */
    protected String targetLabel;

    /** targetRole */
    protected String targetRole;

    /** updatedBy */
    protected String updatedBy;

    /** updatedTime */

)

func TestEmbeddedStruct(t *testing.T) {
	type ReadOnly struct {
		ReadOnly *bool
	}

	type BasePost struct {
		Id    int64
		Title string
		URL   string
		ReadOnly
	}

	type Author struct {
		ID    string
		Name  string
		Email string
	}

	type HNPost struct {
		BasePost
		Author  `gorm:"EmbeddedPrefix:user_"` // Embedded struct
		Upvotes int32
	}

	type EngadgetPost struct {