If you find that you're having difficulty writing a test, it's a red flag that the code under test may be complex.
如果您发现自己难以编写某一代码，那么这是一种警示，表示正在测试的代码可能很复杂。
Singapore national flag: is composed by on red under white two equal horizontal rectangles, is long and the wide ratio is 3:2.
新加坡国旗：由上红下白两个相等的横长方形组成，长与宽之比为3∶2。
Singapore national flag: is composed by on red under white two equal horizontal rectangles, is long and the wide ratio is 3:2.
新加坡国旗：由上红下白两个相等的横长方形组成，长与宽之比为3∶2。
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