assert

What is “assert” in JavaScript?

由 a 夏天 提交于 2019-11-26 18:45:29
问题 What does assert mean in JavaScript? I’ve seen something like: assert(function1() && function2() && function3(), "some text"); And would like to know what the method assert() does. 回答1: There is no assert in JavaScript (yet; there's talk of adding one, but it's at an early stage). Perhaps you're using some library that provides one. The usual meaning is to throw an error if the expression passed into the function is false; this is part of the general concept of assertion checking. Usually

Python : Assert that variable is instance method?

由 被刻印的时光 ゝ 提交于 2019-11-26 18:25:50
问题 How can one check if a variable is an instance method or not? I'm using python 2.5. Something like this: class Test: def method(self): pass assert is_instance_method(Test().method) 回答1: inspect.ismethod is what you want to find out if you definitely have a method, rather than just something you can call. import inspect def foo(): pass class Test(object): def method(self): pass print inspect.ismethod(foo) # False print inspect.ismethod(Test) # False print inspect.ismethod(Test.method) # True

PHPUnit assert that an exception was thrown?

由 爱⌒轻易说出口 提交于 2019-11-26 18:25:02
Does anyone know whether there is an assert or something like that which can test whether an exception was thrown in the code being tested? Frank Farmer <?php require_once 'PHPUnit/Framework.php'; class ExceptionTest extends PHPUnit_Framework_TestCase { public function testException() { $this->expectException(InvalidArgumentException::class); // or for PHPUnit < 5.2 // $this->setExpectedException(InvalidArgumentException::class); //...and then add your test code that generates the exception exampleMethod($anInvalidArgument); } } expectException() PHPUnit documentation PHPUnit author article

Exception Vs Assertion

由 ￡可爱￡侵袭症＋ 提交于 2019-11-26 18:20:24
What is the difference between Java exception handling and using assert conditions? It's known that Assert is of two types. But when should we use assert keyword? Use assertions for internal logic checks within your code, and normal exceptions for error conditions outside your immediate code's control. Don't forget that assertions can be turned on and off - if you care about things like argument validation, that should be explicit using exceptions. (You could, however, choose to perform argument validation on private methods using assertions, on the grounds that a violation at that point is

How to check if an object is a list or tuple (but not string)?

由 左心房为你撑大大i 提交于 2019-11-26 18:03:33
This is what I normally do in order to ascertain that the input is a list / tuple - but not a str . Because many times I stumbled upon bugs where a function passes a str object by mistake, and the target function does for x in lst assuming that lst is actually a list or tuple . assert isinstance(lst, (list, tuple)) My question is: is there a better way of achieving this? Nick Craig-Wood In python 2 only (not python 3): assert not isinstance(lst, basestring) Is actually what you want, otherwise you'll miss out on a lot of things which act like lists, but aren't subclasses of list or tuple .

Design by contract using assertions or exceptions? [closed]

由 喜夏-厌秋 提交于 2019-11-26 17:26:22
问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed last year . When programming by contract a function or method first checks whether its preconditions are fulfilled, before starting to work on its responsibilities, right? The two most prominent ways to do these checks are by assert and by exception . assert fails only in debug mode. To

【python】如何使用全功能的Python测试框架（小白白必看系列）

由 拥有回忆 提交于 2019-11-26 17:20:50
如何使用pytest 大纲 安装和简单使用 配置文件 笔记来自： http://stu.ityxb.com/index.html#/ansandqus 断言 一. 第一步 —— 安装和简单使用 pytest是一个非常成熟的全功能的Python测试框架，主要特点有以下几点： • 1、简单灵活，容易上手，文档丰富； • 2、支持参数化，可以细粒度地控制要测试的测试用例； • 3、能够支持简单的单元测试和复杂的功能测试，还可以用来做selenium/appnium等自动化测试、接口自动化测试（pytest+requests）; • 4、pytest具有很多第三方插件，并且可以自定义扩展，比较好用的如pytest-selenium（集成selenium）、pytest-html（完美html测试报告生成）、pytest-rerunfailures（失败case重复执行）、pytest-xdist（多CPU分发）等； • 5、测试用例的skip和xfail处理； • 6、可以很好的和CI工具结合，例如jenkins 安装 pip3 install pytest 简单使用 新建一个test_sample.py文件，输入以下代码： def inc(x): return x + 1 def test_answer(): assert inc(3) == 5 在test_sample

Pytest单元测试框架-环境安装

由 我只是一个虾纸丫 提交于 2019-11-26 17:06:19
unittest是python自带的单元测试框架，它封装好了一些校验返回的结果方法和一些用例执行前的初始化操作，使得单元测试易于开展，因为它的易用性，很多同学也拿它来做功能测试和接口测试，只需简单开发一些功能（报告，初始化webdriver，或者http请求方法）便可实现。 但自动化测试中我们常常需要根据不同需求挑选部分测试用例运行，并且我们希望用例克服环境不稳定的局限，即运行失败后自动重新运行一次，如果成功就认为是环境问题导致第一次失败，还有我们经常希望测试用例可以并发执行等等，这些unittest都做不到或者需要大量二次开发才能做到，那么有没有更加强大的框架可以替代unittests呢？ pytest是python里的一个强大框架，它可以用来做单元测试，你也可以用来做功能，接口自动化测试。而且它比unittest支持的功能更多更全面。但是pytest在Getstarted里给出的实例却很简单，很多同学错以为它只是跟unittest一样是个单元测试框架罢了，如果你查询中文互联网，你也只能找到寥寥数篇大致一样的用法，可以说pytest的精髓使用，没有被大家挖掘出来，如此强大的框架不应该被埋没，今天我就带领大家深入pytest使用，共同领略pytest的强大。 1.安装pytest单元测试框架 2.检查Pytest安装版本 使用的命令是：pip show pytest 也可以使用

python assert使用说明

由 南笙酒味 提交于 2019-11-26 16:42:00
self.assertEqual(a,b,msg=msg) #判断a与1.b是否一致，msg类似备注，可以为空 self.assertNotEqual(a,b,msg=msg) #判断a与b是否不一致 self.assertTrue(a,msg=none) #判断a是否为True self.assertFalse(b,msg=none) #判断b是否为false self.assertAlmostEqual(a,b,places=none,msg=none,delta=none) #该判断过程有点复杂，判断过程如下 注：places与delta不能同时存在，否则出异常 #若a==b，则直接输入正确，不判断下面的过程 #若delta有数，places为空，判断a与b的差的绝对值是否<=delta，满足则正确，否则错误 #若delta为空，places有数，判断b与a的差的绝对值,取小数places位，等于0则正确，否则错误 #若delta为空，places为空，默认赋值places=7判断 例 assertAlmostEqual(2,2) 正确， assertAlmostEqual(5,2,delta=4) 正确 assertAlmostEqual(5,2,delta=2) 错误 assertAlmostEqual(2,2.005,places=1) 正确

网络编程入门10

由 流过昼夜 提交于 2019-11-26 16:18:43
TcpConnection.h void muduo::net::defaultConnectionCallback(const TcpConnectionPtr& conn) { LOG_TRACE << conn->localAddress().toIpPort() << " -> " << conn->peerAddress().toIpPort() << " is " << (conn->connected() ? "UP" : "DOWN"); // do not call conn->forceClose(), because some users want to register message callback only. } void muduo::net::defaultMessageCallback(const TcpConnectionPtr&, Buffer* buf, Timestamp) { buf->retrieveAll(); } typedef std::shared_ptr<TcpConnection> TcpConnectionPtr; class TcpConnection : noncopyable, public std::enable_shared_from_this<TcpConnection> { private: enum
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