assert | 易学教程

Duplicating Node.js `assert` assertions in spec `expect` [closed]

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问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3 years ago . As opposed to non-asserted code with custom developer-friendly checks, class Some { constructor(arg) { if (Array.isArray(arg) && arg[0] === 'foo') this.foobar = arg.concat('bar').join(''); else console.error('Bad Some constructor arg'); } } currently tested code is heavily packed

Assertion in MySQL

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问题 I have a SQL script to run against a large database. I'd like to put a couple of simple queries at the start, just as a sanity check. Is there any way to write an assertion in MySQL? Or any kind of "select ..., and if it doesn't match this value, then abort the entire script"? 回答1: Some crazy code. Main point is: SET could raise error for mysql variables. For example. SET @value = 0; SET SESSION sql_mode = if(@value, @@SESSION.sql_mode, 'something wrong uphere'); Would output ERROR 1231

How can I do a runtime assert in a constexpr function?

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问题 From what I understand, a constexpr function can be executed at compile time as well as runtime, depending on if the entire evaluation can be done at compile time or not. However, you cannot overload this function to have a runtime and a compile time counterpart. So my question is, how can I put in a runtime assert to ensure that the execution of the runtime function is passed valid parameters along with my static_assert? 回答1: Eric Niebler covers this issue well in Assert and Constexpr in C+

Is it worth using Debug.Assert in ASP.NET?

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问题 It seems like a fairly large hassle to set up a proper debug environment in ASP.NET and I'm just wondering if using Asserts are the way to go or not. I've read a bit and saw that you need to modify your web.config to properly use Asserts. Is this usually the best way to go or are there other methods of debugging that might be easier to use? We don't use a unit testing framework so that isn't really relevant to the question. How do you know the difference between them working properly or not

Is it worth using Debug.Assert in ASP.NET?

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use asserts for debugging Modelica

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问题 In Modelica, one could define a protected final constant Boolean debug and then use that in an assert statement to print out some values while debugging, similar to the code shown below (or as seen on github). In the final version, debug would then be set to false. Would that slow down the simulation or does the assert get eliminated, because debug is a constant? model debugexample parameter Real a; parameter Real b; Real sum; protected final constant Boolean debug = false "set to true while

What is the best way of checking the matrix value in Unit test?

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问题 What is the best way of checking the matrix value in Unit test? I have a method in my project, something like this: int[][] getMatrix() { int[][] ans = new int[1][]; ans[0] = new int[1]; ans[0][0] = 0; return ans; } I want to unit-test this class using visual studio standard testing engine, so I create a unit test, something like this: [TestMethod] public void Test() { var result = getMatrix(); int[][] correct = new int[1][]; correct[0] = new int[1]; correct[0] = 0; Assert.AreEqual(correct

XSD 1.1 Assert to Count and Compare Elements

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问题 I currently have an XSD file which controls the validation etc towards my corresponding XML file, and I would like to control (preferably using an assert command rather than XLST [as I have no prior knowledge of this]) and be able to ensure there are the same number of abc:Country tags to abc:AccountNumber tags, as one should correspond to the other <abc:Account> <abc:Individual> <abc:Country>Germany</abc:Country> <abc:Country>Australia</abc:Country> <abs:AccountNumber issuedBy="DE">123456<

XSD 1.1 Assert to Count and Compare Elements

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[置顶] java面试题经典20例【第二季】

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1、 Anonymous Inner Class ( 匿名内部类) 是否可以extends(继承)其它类，是否可以implements(实现)interface(接口)? 可以继承其他类或完成其他接口，在swing编程中常用此方式。 2、 HashMap 和Hashtable 的区别。 HashMap是Hashtable的轻量级实现（非线程安全的实现），他们都完成了Map接口，主要区别在于HashMap允许空（null）键值（key）,由于非线程安全，效率上可能高于Hashtable. 3、 Collection 和 Collections 的区别。 Collection是集合类的上级接口，继承与他的接口主要有Set 和List. Collections是针对集合类的一个帮助类，他提供一系列静态方法实现对各种集合的搜索、排序、线程安全化等操作。 4 、什么时候用assert 。 1.4新增关键字（语法），用于测试boolean表达式状态，可用于调试程序。使用方法 assert <boolean表达式>，表示如果表达式为真（true）,则下面的语句执行，否则抛出AssertionError。另外的使用方式assert < boolean表达式>:<other表达式>，表示如果表达式为真，后面的表达式忽略，否则后面表达式的值用于AssertionError的构建参数。