assert | 易学教程

Using assert within kernel invocation

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问题 Is there convenient way for using asserts within the kernels invocation on device mode? Thanks, in advance. 回答1: CUDA now has a native assert function. Use assert(...) . If its argument is zero, it will stop kernel execution and return an error. (or trigger a breakpoint if in CUDA debugging.) Make sure to include "assert.h". Also, this requires compute capability 2.x or higher, and is not supported on MacOS. For more details see CUDA C Programming Guide, Section B.16. The programming guide

How do I disable Java assertions for a junit test in the code

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问题 How do I disable java assertions (not junit assert) for a junit test in the code Ive written a junit test but when I run it it doesnt fail as expected because assertions are enabled, whereas they are not in production. Is there a way to disable assertions just in the code so that it work as expected when run within IDE and when built as part of Maven 回答1: Typically you use surefire with maven for JUnit tests. Adding -disableassertions or the synonym -da as an argument should work: <plugin>

Why does Cobertura fail to report assert branch path was covered?

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问题 In Cobertura, I can not get it to report that the conditional path of an assert statement was taken. Is this a known limitation? I have a JUnit test that expects and AssertionError to be thrown, and it passes correctly. The problem is that Cobertura reports that the assert branch was not covered. After more investigation, I see that part of the branch coverage is being detected. The line is question is: assert data != null; and Cobertura reports the coverages as: Conditional coverage 75% (3/4

【面试题】C语言：模拟实现memcmp，试比较memcmp与strcmp，strncmp的区别

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模拟实现内存比较函数memcmp：该函数与strcmp有相似之处，都可用于字符串比较是否相同，若相同，则返回0值。若前者大于后者，则返回大于0的整型值，否则返回小于0的整型值。区别在于： strcmp只能比较字符串，memcmp是内存比较函数，原则上是比较内存的，但其实真正实现时并不是所有都可以比较，例如float，但我们至少可以比较字符串以及int型。而对于strcmp，strncmp的比较：str1, str2 为需要比较的两个字符串，n为要比较的字符的数目，而函数strcmp()做不到，strcmp()可以比较全部字符串（因为它找字符串结束标志‘\0’）。关于strcmp的实现，可以查看我的博客 http://10740184.blog.51cto.com/10730184/1714512 关于strncmp的实现，可以查看我的博客 http://10740184.blog.51cto.com/10730184/1715207 代码如下： #define _CRT_SECURE_NO_WARNINGS 1 #include<stdio.h> #include<stdlib.h> #include<assert.h> int my_memcmp(const void *p1, const void *p2, size_t count) { assert(p1);

Slow Scala assert

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问题 We've been profiling our code recently and we've come across a few annoying hotspots. They're in the form assert(a == b, a + " is not equal to " + b) Because some of these asserts can be in code called a huge amount of times the string concat starts to add up. assert is defined as: def assert(assumption : Boolean, message : Any) = .... why isn't it defined as: def assert(assumption : Boolean, message : => Any) = .... That way it would evaluate lazily. Given that it's not defined that way is

HowTo PHPUnit assertFunction

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问题 I was wondering if how I can verify if a 'class' has a Function. assertClassHasAttribute does not work, it's normal since a Function is not an Attribute. 回答1: When there's not an assertion method provided by PHPUnit I either create it or use one of the lower-level assertions with a verbose message: $this->assertTrue( method_exists($myClass, 'myFunction'), 'Class does not have method myFunction' ); assertTrue() is as basic as you can get. It allows a great deal of flexibility because you can

NUnit Assert.Equals vs. Assert.AreEqual

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问题 What is the difference between: Assert.Equals and Assert.AreEqual Assert.NotNull and Assert.IsNotNull ... ? 回答1: Just read the documentation: NUnit - ConditionAsserts Two forms are provided for the True, False, Null and NotNull conditions. The "Is" forms are compatible with earlier versions of the NUnit framework, while those without "Is" are provided for compatibility with NUnitLite. 回答2: Assert.Equals is an object comparison Assert.AreEquals is overloaded to compare (int,double, object) etc

opencv error: assertion failed (size.width>0 && size.height>0) in unknown function line 261

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问题 This is my code: #include<opencv\cv.h> #include<opencv\highgui.h> using namespace cv; int main(){ //create matrix to store image Mat image; //initialize capture VideoCapture cap(0); cap.open(0); //create window to show image namedWindow("window",1); while(1){ //copy webcam stream to image cap>>image; //print image to screen imshow("window",image); //Error line //delay 33ms waitKey(33); } } The error I get: opencv error: assertion failed (size.width>0 && size.height>0) in unknown function file

Testing for side-effects in python

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问题 I want to check that my function has no side-effects, or only side-effects affecting precise variables. Is there a function to check that it actually has no side-effects (or side-effects on only certain variables)? If not, how can I go about writing my own as follows: My idea would be something like this, initialising, calling the function under test, and then calling the final method: class test_side_effects(parents_scope, exclude_variables=[]): def __init__(): for variable_name, variable

Need py.test to log assert errors in log file from python logging module

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问题 Need py.test to log assert errors in log file from python logging module. The test has python logging module set up and all logs goes there as expected. I used assert statements through out the test. But when encounter assertion errors, those messages are not logged in the python logging output but in command console. Is there a way to get py.test to log the assertion errors in the test's logging output? Right now the errors are in command console but it would be great if these assertion