def format_camel_case(text):
    """
    Example::

        ThisIsVeryGood

    **中文文档**

    将文本格式化为各单词首字母大写, 拼接而成的长变量名。
    """
    text = text.strip()
    if len(text) == 0:  # if empty string, return it
        raise ValueError("can not be empty string!")
    else:
        text = text.lower()  # lower all char
        # delete redundant empty space
        words = list()
        word = list()
        for char in text:
            if char in ALPHA_DIGITS:
                word.append(char)
            else:
                if len(word):
                    words.append("".join(word))
                    word = list()
        if len(word):
            words.append("".join(word))

        words = [word[0].upper() + word[1:] for word in words]
        return "".join(words)