assert

Handling error checking with assert

由 两盒软妹~` 提交于 2019-12-11 13:00:38
问题 I've looked all over and it seems that there are a lot of mixed views on assert. For example, if I'm malloc'ing a pointer and want to make sure it's been allocated correctly I'd write: p = malloc(sizeof(int)); assert(p) instead of: p = malloc(sizeof(int)); if (p == NULL) { ... send error message } I know that with assert it will end the program, but for testing purposes — what I want to know is what the absolute safest way of: testing for things like a malloc being done correctly. dealing

Assert Method Error

由 若如初见. 提交于 2019-12-11 08:42:32
问题 I am using the line Assert.IsNotNull(object); in my code. I keep getting the error: the name assert does not exist in the current content Can someone please tell me what I'm missing? 回答1: You need to add Microsoft.VisualStudio.QualityTools.UnitTestFramework to your project references and add using Microsoft.VisualStudio.TestTools.UnitTesting; 回答2: Is sounds like you don't have an appropriate using directive, such as using NUnit.Framework; in your code. The exact directive will depend on which

CodeContracts: Reuse of assumptions/asserts?

由 隐身守侯 提交于 2019-12-11 07:43:44
问题 I've posted this on the CodeContracts forum at the MSDN but apparently no one knows or bothers to look into this issue. I've tried to reduce the repetitive asserts and make it more reusable but unfortunately this doesn't work can you explain why? [ContractVerification(false)] public static class Assert { [Conditional("DEBUG")] public static void GreaterThan<T>(T value, T lowerBound) where T : IComparable<T> { Contract.Ensures(value.CompareTo(lowerBound) > 0); } [Conditional("DEBUG")] public

How to build a custom macro that behaves differently when used as constexpr (like assert)?

由 旧城冷巷雨未停 提交于 2019-12-11 06:19:12
问题 Starting in C++14, the assert macro can be used in functions even when they are defined as constexpr. I know this has to do with the fact that it evaluates to "true", but I'm having trouble figuring out what the actual code looks like. Specifically, how do you build a macro that prints something when run in a constexpr function that is being evaluated at run time, but shuts this non-constexpr behavior off when in a constexpr function that is being evaluated at compile time. 来源： https:/

TDD: Number of Asserts, and what to actually assert? [closed]

由 旧城冷巷雨未停 提交于 2019-12-11 06:09:36
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 6 years ago . I am currently writing tests using TDD and I have come up against a few queries. Normally when writing unit tests, i always used to use 1 assert per unit tests as this is what is defined as good practice and its easy to see why your test is failing. In TDD, is it also good

Python小tips和学习整理

由 别等时光非礼了梦想. 提交于 2019-12-11 05:17:38
Python小tips和学习整理 在类中单下划线_或双下划线开头的函数和变量的意义 getattr（）函数和与之相关的函数 hasattr(object, name) getattr(object, name, default) setattr(object, name, default) delattr(object,'name') importlib.import_module()方法 isinstance（）方法 assert()断言宏 在类中单下划线_或双下划线开头的函数和变量的意义   Python在类中的函数和变量有以单下划线开头的命名（比如_getFile），也有以双下划线开头的命名（比如__filename），以及双下划线开头和结尾的命名（比如__init()__），这些命名都是带有特殊的意味的： 【1】以单下划线开头的函数或变量 ，被默认为是 内部函数或变量 。比如： def get_model ( config ) : def _model_class ( class_name ) : . . . . .    内部函数或变量一般只能在类中或内部使用 ，即比如使用 from a_module import * 这样的方式导入时a_module中的变量和函数时， 内部函数和变量不会被导入 。   不过值得注意的是，如果使用 import a_module

Is it possible to use compile time asserts in C++

由 你离开我真会死。 提交于 2019-12-11 04:52:38
问题 I want to use a template for some data processing, but I need the code to be more or less safe when ported. This might be a problem if sizes of variables grow beyond anticipated values, so I would like to assert at compile time that some assumptions are still valid. For example, sizeof(long)>sizeof(int) , so that if this assumption fails, I could break the build. I know that standard mandates that long>=int , but this is just an example, don't concentrate on the variable types. 回答1: C++11 has

Define an assert which is effective even if NDEBUG is defined

由 六眼飞鱼酱① 提交于 2019-12-11 04:44:05
问题 I would like to define an assert macro which is identical to the standard assert(3) call except that it isn't removed by the pre-processor when NDEBUG is defined. Such a call, let us call it assert2 here, is useful for example if you want to have some checks happen in release versions of software as well. How can I do this in a reasonably portable way? I could always just completely re-create the assert mechanism, like 1 : #define assert2(cond) cond ? (void)0 : die_now(#cond, __FILE__, __LINE

Mocking a method outside of a class

由 寵の児 提交于 2019-12-11 04:17:49
问题 I need to write a unit test for credential checking module looks something like below. I apologize I cannot copy the exact code.. but I tried my best to simplify as an example. I want to patch methodA so it returns False as a return value and test MyClass to see if it is throwing error. cred_check is the file name and MyClass is the class name. methodA is outside of MyClass and the return value checkedcredential is either True or False. def methodA(username, password): #credential check logic

Does Flutter remove debug-mode code when compiling for release?

由 瘦欲@ 提交于 2019-12-11 02:47:52
问题 I'm wondering whether it is safe to place passwords directly in the Dart code like below. Does Flutter remove the code when compiling it for release? Of course I want to make sure that the code cannot be decompiled such that the username and password can be extracted. bool get isInDebugMode { bool inDebugMode = false; assert(inDebugMode = true); return inDebugMode; } if(inDebugMode){ emailController.text = 'random@email.com'; passwordController.text = 'secret'; } 回答1: Tree-shaking removes
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