List<String> fields = Arrays.asList("field1", "field2");
        List<String> tags = Arrays.asList("tag1", "tag2");
        List<String> roles = Arrays.asList("role1", "role2");

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

        assertEquals(word, elevateWord.getElevateWord());
        assertEquals(boost, elevateWord.getBoost(), 0.001f);

		}
	}
}

func TestEmbeddedTagSetting(t *testing.T) {
	type Tag1 struct {
		Id int64 `gorm:"autoIncrement"`
	}
	type Tag2 struct {
		Id int64
	}

	type EmbeddedTag struct {
		Tag1 Tag1 `gorm:"Embedded;"`
		Tag2 Tag2 `gorm:"Embedded;EmbeddedPrefix:t2_"`
		Name string
	}

	DB.Migrator().DropTable(&EmbeddedTag{})

                new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.DOCUMENT);

        SuggestItem item2 = new SuggestItem(new String[] { "テスト" }, readings, new String[] { "content" }, 2, 0, -1, new String[] { "tag2" },
                new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.DOCUMENT);

		return p
	}
	return ""
}

// Tags - a rule can either have tag under <filter></filter> or under
// <filter><and></and></filter>. This method returns all the tags from the
// rule in the format tag1=value1&tag2=value2
func (r Rule) Tags() string {
	if !r.Filter.Tag.IsEmpty() {
		return r.Filter.Tag.String()
	}
	if len(r.Filter.And.Tags) != 0 {
		var buf bytes.Buffer

        items.add(new SuggestItem(new String[] { "word1" }, readings, new String[] { "content" }, 0, 10, -1, new String[] { "tag1" },
                new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.QUERY));
        items.add(new SuggestItem(new String[] { "word2" }, readings, new String[] { "content" }, 0, 5, -1, new String[] { "tag2" },
                new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.QUERY));

        items.add(new SuggestItem(new String[] { "test" }, readings, new String[] { "content" }, 1, 0, -1, new String[] { "tag1" },
                new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.DOCUMENT));
        items.add(new SuggestItem(new String[] { "example" }, readings, new String[] { "content" }, 2, 0, -1, new String[] { "tag2" },
                new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.DOCUMENT));

	}
	return r.Filter.And.Prefix
}

// Tags - a rule can either have tag under <filter></filter> or under
// <filter><and></and></filter>. This method returns all the tags from the
// rule in the format tag1=value1&tag2=value2
func (r Rule) Tags() string {
	if !r.Filter.Tag.IsEmpty() {
		return r.Filter.Tag.String()
	}
	if len(r.Filter.And.Tags) != 0 {
		var buf bytes.Buffer

        String searchWord = "検索 エンジン";
        String[] fields = new String[] { "content" };
        String[] tags = new String[] { "tag1" };
        String[] roles = new String[] { SuggestConstants.DEFAULT_ROLE };

        SuggestIndexResponse response = suggester.indexer().indexFromSearchWord(searchWord, fields, tags, roles, 1, null);

        assertNotNull(response);
        assertEquals(1, response.getNumberOfInputDocs());

                new String[] { "field1", "field2" }, 10, // queryFreq
                5, // docFreq
                2.0f, // userBoost
                new String[] { "tag1", "tag2" }, new String[] { "role1" }, new String[] {}, // languages
                SuggestItem.Kind.DOCUMENT);
        item.setTimestamp(ZonedDateTime.now());

 */
internal sealed class Tags {
  /**
   * Returns a tags instance that maps [key] to [value]. If [value] is null, this returns a tags
   * instance that does not have any mapping for [key].
   */
  abstract fun <T : Any> plus(
    key: KClass<T>,
    value: T?,
  ): Tags

  abstract operator fun <T : Any> get(key: KClass<T>): T?
}

/** An empty tags. This is always the tail of a [LinkedTags] chain. */