🐞 fix(text-similarity): 修复除0报错 (#302)

* 🐞 fix(text-similarity): 修复除0报错

没有考虑到bilibili的推送出现动态或者视频简介长度为零的情况，出现文本相似度除0Error

* 🧪 test(bilibili): 添加视频动态内容为空的情况的测试

* 🧪 test(text-similarity): 增加文本相似度函数的测试

* Update test_rss.py

* 📃 docs(text_similarity): 添加文本相似度函数的注释

* 🦄 refactor(text_similarity): 重构文本相似度的比较方法

* 🎈 perf(similar_text): 将比较函数的return改成raise

* 🦄 refactor(text_similarity): 重构文本相似度比较方法

* Update nonebot_bison/platform/bilibili.py

Co-authored-by: felinae98 <731499577@qq.com>

* Update nonebot_bison/platform/rss.py

Co-authored-by: felinae98 <731499577@qq.com>

---------

Co-authored-by: felinae98 <731499577@qq.com>

nonebot_bison/utils/__init__.py

@@ -95,6 +95,9 @@ if plugin_config.bison_filter_log:
 
 
 def text_similarity(str1, str2) -> float:
+    """利用最长公共子序列的算法判断两个字符串是否相似，并返回0到1.0的相似度"""
+    if len(str1) == 0 or len(str2) == 0:
+        raise ValueError("The length of string can not be 0")
     matcher = difflib.SequenceMatcher(None, str1, str2)
     t = sum(temp.size for temp in matcher.get_matching_blocks())
     return t / min(len(str1), len(str2))