这是个定义在<assert.h>中的宏,用来测试断言。
It is a macro, defined in<assert. h>, for testing''assertions''.举个极端的例子,看下pytest,它聪明的处理了Python的assert声明。
For an extreme example, have a look at pytest, which does very clever things with Python's assert statement.乐队招募了Assert低音歌手AdamRichardson,以及作为首席吉他手的“Asatru's”RobEngvikson。
The band recruited Assert bass-player Adam Richardson, and Asatru's Rob Engvikson as lead guitarist.就像之前讨论的单元测试一样,集成测试的逻辑也是用了Arrange、Act和Assert。
Just like in the previous section where we discussed unit testing, the logic for our integration testing also using the Arrange/Act/Assert logic.新的机能会引进新的方式可以在编译期测试assertion,只要使用新的关键字static_assert。
The new utility introduces a new way to test assertions at compile-time, using the new keyword static_assert.如果想要插入断言,只需要简单地调用Debug.Assert或是Release.Assert:.
To indicate an assertion, you simply called Debug. Assert or Release. Assert:.Lt;assert.h>包含断言宏,被用来在程序的调试版本中帮助检测逻辑错误以及其他类型的bug。
Lt;assert. h> Contains the assert macro, used to assist with detecting logical errors and other types of bug in debugging versions of a program.对于这个测试,没有反馈消息就证明是好的:在执行成功的assert语句之后,improve_test返回的是None。
For this test, no news is good news: improve_test returns None after its assert statement is executed successfully.大多数的特性(模块引入,条件编译)都了无新意,但或许最有趣的就是如何让Swift支持像assert()这样的宏。
Most of these features are obvious(importing modules, conditional compilation), but perhaps the most interesting one is how Swift supports macros like assert().在每个测试中,assert将根据测试结果返回True或False。
In each test, assert will return True or False depending on the test result.图1展示了此类边用于statementAssert.
Figure 1 shows a partial example of such edges for the statement Assert.另外,assert的打开和关闭也是受NDEBUG影响。
Tubal opening and closing are also affected by.Pytest允许您使用标准的pythonassert用于验证Python测试中的期望和值。
Pytest allows you to use the standard python assert for verifying expectations and values in Python tests.Assert模块提供了一组简单的断言测试,用于测试不变量.
The assert module provides a simple set of assertion tests that can be used to test invariants.通常,assertx==1为false时只会简单的抛出一个AssertionError异常,导致你不知道错误是什么或者哪里出错了。
Normally, writing assert x== 1 would simply throw an AssertionError when false, leaving you with no context for what went wrong or where.但是与C不同的是,函数体内的assert会抛出AssertException,这个异常可以被捕获并处理。
Unlike C, however, an assert in function bodies works by throwing an AssertError, which can be caught and handled.Assert函数只能用于测试内部错误,并检查非变量。
The assert function should only be used to test for internal errors, and to check invariants.我想主要原因是assert不经常使用是因为没有人使用Python的“优化”模式。
I guess the main reason for assert not being used more often is that nobody uses Python's“optimized” mode.这里有一个更好的解决方案,使用assert语句和Python的basestring的类型一起,它是unicode和str的产生类型。
Here's a better solution, using an assert statement together with Python's basestring type that generalizes over both unicode and str.
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