目录if格式条件测试整数测试字符测试文件测试组合条件测试在bash中,if是可以对语句做选择执行，做if条件测试有整数测试，字符测试，文件测试三种形式。
I have the following classes: Defect - represents a type of data that can be found in a database FilterQuery - provides a way of querying the database by setting simple Boolean filters
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