# 7. 测试

## 本章目录

* [7.1 测试结构](/shell/part2/07_tests/07_1_test_constructs.md)
* [7.2 文件测试操作](/shell/part2/07_tests/07_2_file_test_operators.md)
* [7.3 其他比较操作](/shell/part2/07_tests/07_3_other_comparison_operators.md)
* [7.4 嵌套 if/then 条件测试](/shell/part2/07_tests/07_4_nested_if_then_condition_tests.md)
* [7.5 牛刀小试](/shell/part2/07_tests/07_5_testing_your_knowledge_of_tests.md)

每一个完备的程序设计语言都可以对一个条件进行判断，然后根据判断结果执行相应的指令。Bash 拥有 [`test`](http://tldp.org/LDP/abs/html/testconstructs.html#TTESTREF) 命令，[双方括号](http://tldp.org/LDP/abs/html/testconstructs.html#DBLBRACKETS)、[双圆括号](http://tldp.org/LDP/abs/html/testconstructs.html#DBLPARENSTST) 测试操作符以及 `if/then` 测试结构。


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