But reading and writing files in unit tests slows tests and requires adding more complexity (like creating a temp directory and cleaning up files after use).

但在单元测试中读和写文件会减缓测试，增加更多的复杂性(如创建临时目录和在使用后清除文件)。

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The increased threat of further conflict in the Middle East intensified the push, adding to late gains on Thursday made after an extra batch of Iranian missile tests and more tub-thumping rhetoric.

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