if err := DB.Migrator().RenameTable(&TableStruct{}, &NewTableStruct{}); err != nil {
		t.Fatalf("Failed to rename table, got error %v", err)
	}

	if !DB.Migrator().HasTable("new_table_structs") {
		t.Fatal("should found renamed table")
	}

	DB.Migrator().DropTable("new_table_structs")

	if DB.Migrator().HasTable(&NewTableStruct{}) {
		t.Fatal("should not found dropped table")
	}
}

// chance the file doesn't exist yet.
var (
	randN  uint32
	randmu sync.Mutex
)

// Temp files created in default Tmp dir
var globalTestTmpDir = os.TempDir()

// reseed - returns a new seed every time the function is called.
func reseed() uint32 {
	return uint32(time.Now().UnixNano() + int64(os.Getpid()))
}

// nextSuffix - provides a new unique suffix every time the function is called.
func nextSuffix() string {

     * Uses Handlebars templates to render the cached content.
     *
     * @param doc the document data map
     * @param queries the search queries for highlighting
     * @return the rendered cache content
     */
    public String createCacheContent(final Map<String, Object> doc, final String[] queries) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();