Unit testing is a method by which individual units of source code are tested to determine if they are fit for use.

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How would you unit-test or perform the most effective automated testing on graphics code for OpenGL?

I'm writing a game and the accompanying graphics engine on top of OpenGL in C++. Im also a fan of good coding processes and automated testing. Graphics code + testing seems pretty immiscible, since ...
0
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0answers
73 views

Populate faked context for unit testing WPF ViewModels using entity framework

We're developing an entity framework based application which has about 20 different entities, with quite a lot of connections of various types (one-many, many-many etc) between them. Each entity also ...
3
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4answers
274 views

Convincing my boss that touching the Database is integration testing [closed]

I am currently working on introducing continuous integration and switching to git, and as part of that, we must also better structure our tests. We have agreed on splitting the tests in "integration" ...
70
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16answers
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When is unit testing inappropriate or unnecessary? [duplicate]

It seems to be generally assumed (on Stack Overflow at least) that there should always be unit tests, and they should be kept up to date. But I suspect the programmers making these assertions ...
0
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2answers
139 views

Unit Testing large controller actions

I've a web page that has many constituent parts. On some user action, a POST operation is made, which then returns JSON to update the page. The problem is that this JSON payload contains a lot of ...
20
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12answers
4k views

How does unit testing work?

I am trying to make my code more robust and I have been reading about unit testing, but I find it very hard to find an actual useful use. For instance, the Wikipedia example: public class TestAdder { ...
12
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9answers
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Should failing unit tests that we're not going to fix be removed? [duplicate]

My coworker likes to see all of our unit tests pass (as would anyone) and he argues that some of the failing tests of a system he wrote are unnecessary "noise" since they all involve the validity of ...
6
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3answers
937 views

How to unit test code that downloads a file from a github repo

This is my solution's structure: Storage.csproj > FileDownloader.cs > GitHubProvider.cs (implements IStorageProvider) > IStorageProvider.cs Storage.Test.csproj > ...
8
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2answers
242 views

Test Driven Development for Complex Games

I'm coding a game in my spare time, but I am mostly still a beginner when it comes to programming. I'm sorry if this question is off topic or if it ends up not being helpful to anyone else, but ...
0
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2answers
214 views

Is a mocking framework useful if I'm unit testing a repository/database? [duplicate]

I'm trying to improve my testing skills. I frequently hear about mocking framework to build fake objects (as far as I understand). Right now I need to test my repository (the usual add, remove, update ...
2
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2answers
102 views

Should “tests” be kept out of the main merge pipeline?

We all know sometimes a e.g. merge can go wrong. If our [unit / integration] tests are in the same repository as the merge, is there then a weakness there that if the tests have merged incorrectly ...
0
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0answers
51 views

Mixing newable and injectable in a Callable

I recently read http://misko.hevery.com/2008/09/30/to-new-or-not-to-new/ which discussed newable vs injectable objects. What would you do if you needed to make a Callable that talks to some service ...
24
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2answers
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Unit testing classes that have online functionality

When unit testing functions of a class that has private functions that require online functionality. How would one go about testing it? For example: public class Foo { public int methodA() { ...
2
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2answers
107 views

Unit test database insert/remove and atomicity

I create my compact test database. This is a SDF file, embedded as a visual studio resource. When test suite starts this database is copied in %LOCALAPPDATA% so my test can use it. The first method ...
4
votes
4answers
325 views

Test-Driven Design is not Unit Testing [closed]

Ran across this statement by Martin Fowler circa 2002: Unit testing in XP is often unlike classical unit testing, because in XP you're usually not testing each unit in isolation. You're testing ...
16
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8answers
1k views

What are good unit tests to cover the use case of rolling a die?

I'm trying to get to grips with unit testing. Say we have a die which can has a default number of sides equal to 6 (but can be 4, 5 sided etc.): import random class Die(): def __init__(self, ...
10
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1answer
408 views

Testing strategy for games

I've inherited a web-based educational game. Over the past year I've worked towards stabilizing the code and adding new features. Most of the logic is in the front-end, so back-end unit tests, while ...
0
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0answers
46 views

Unit Testing an object which belongs to another

My example is in Rails/rspec, but is more generic in nature. I have an (abstract-y) class of Events which are attached to another (abstract-y) class, Assets (. Now, I'm testing using FactoryGirl and ...
0
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2answers
105 views

Correct Seam for Stub

In Chapter 3 of his book The Art of Unit Testing: with Examples in C#, Roy Osherove illustrates the issue of undesirable external dependencies in code under test. He shows this with a method ...
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1answer
48 views

State Change Tests

In Chapter 3 of his book The Art of Unit Testing: with Examples in C#, Roy Osherove describes the concept of testing state change of a system. The example code under test he uses looks like this: ...
149
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16answers
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Why does automated testing keep failing in my company?

We have tried to introduce developer automated testing several times at my company. Our QA team uses Selenium to automate UI tests, but I always wanted to introduce unit tests and integration tests. ...
0
votes
3answers
98 views

Is it anti-pattern to mix unit test and web test? [duplicate]

It is a language agnostic question, e.g. I have a unit test like # Unit test User user = User.create('john'); assertEquals("User name is john", "john", user.getName()); # Web test start from here ...
2
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1answer
79 views

How to test generated file without hardcoding name generation logic?

I have a unit I'm testing which generates a file name and saves something there. I will need to pull the file out of that location to test it was stored right. I know how the file name is generated, ...
2
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2answers
50 views

Isolated Unit Tests and Fine Grained Failures

One of the reasons often given to write unit tests which mock out all dependencies and are thus completely isolated is to ensure that when a bug exists, only the unit tests for that bug will fail. ...
2
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6answers
314 views

Can unit tests verify software requirements?

I have often heard unit tests help programmers build confidence in their software. But is it enough for verifying that software requirements are met? I am losing confidence that software is working ...
2
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4answers
227 views

How to refactor a myriad of similar classes

I'm faced with similar classes A1, A2, ..., A100. Believe it or not but yeah, there are roughly hundred classes that almost look the same. None of these classes are unit tested (of course ;-) ). Each ...
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2answers
99 views

How best to construct our test subjects in unit tests?

Some of our business logic classes require quite a few dependencies (in our case 7-10). As such when we come to unit test these the creation become quite complex. In most tests these dependencies are ...
0
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3answers
370 views

How to verify the code that could take a substantial time to compile? [closed]

As a follow up to my prev question: What is the best aproach for coding in a slow compilation environment To recap: I am stuck with a large software system with which a TDD ideology of "test often" ...
5
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2answers
148 views

Is it ok to write “extra” unit tests?

My understanding of how TDD should work is that you write a failing test for the next bit of functionality you want to add to a function or object, code until the test passes and then write the next ...
50
votes
7answers
4k views

Writing Tests for Existing Code

Suppose one had a relatively large program (say 900k SLOC in C#), all commented/documented thoroughly, well organized and working well. The entire code base was written by a single senior developer ...
25
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6answers
2k views

Sense of unit tests without TDD

We have new (quite big) project starting, that we planned to develop using TDD. The idea of TDD failed (many business and non-business reasons), but right now we have a conversation - should we write ...
4
votes
2answers
993 views

How and what should I be (unit) testing for in this method?

I am relatively new to unit testing and have a query about what/how I should be testing a certain method. For the following (psudo-c#) method I have created (not a real-life example) what would you ...
1
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1answer
83 views

Testing for Authentication loop holes / bugs

We've got a web application which is 99% complete prior to public beta, were currenlty securing the site from security perspective, locking down the server, db etc, one thing I'm concerned about but ...
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1answer
193 views

Testing an MMO server

I'm working on a server for a very large (feature wise) MMO. After some bad experiences with breaking changes that caused bugs weeks down the line, we'd like to add unit/automated/regression tests to ...
0
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2answers
73 views

how to write unit test for AND logic gate

I'm learning about unit tests, and have a doubt for a test i want to do, to implement an "AND" logic gate A B A^B 0 0 0 0 1 0 1 0 0 1 1 1 how can i test for a method that works ...
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2answers
108 views

Unit testing - should tests for a method validate the results of other methods?

One thing bothers me while I'm writing unit tests of my code. did tests of method should include validation of outcome from other methods? Of course, public methods. Let's go to - rather trivial - ...
2
votes
3answers
187 views

How important is automated testing in rapid release, non-critical (web) apps?

I think I understand the theoretical benefits of automated testing, especially unit testing. However, I'm not sure what the optimal amount of testing is when the project is a non-critical, rapidly ...
0
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0answers
122 views

Run RSpec from within a ruby script while refreshing all ruby configs etc

I'm working with a very large project with tons of established tests that include some reasonably complicated environment setups and what not. I've recently run into a situation testing some ...
0
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4answers
349 views

Should each method have a seperate JUnit test class?

I am writing JUnit unit tests for my classes. Is it better to have a separate class for each method, or have just one test class for every actual class?
4
votes
3answers
365 views

What is the best use case for selenium?

I've been trying to develop web applications while at the same time creating the testing. I understand unit testing, I can declare a test method and test specific methods in my application. But I ...
2
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2answers
98 views

Should we test the values of objects returned from the methods being unit tested?

Being new to unit testing I would like to know if I am supposed to test the values of objects returned from methods when doing unit testing. As an example, consider the following classes: public ...
1
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1answer
205 views

Which is the more testable C function implementation?

I write code in C. I have been striving to write more testable code but I am a little confused on deciding between writing pure functions that are really good for testing but require smaller functions ...
3
votes
4answers
200 views

How to identify and run the most relevant automated tests?

Suppose you have a reasonably large codebase (0.5 - 1 msloc) with a large test-suite (6-7hr single-threaded runtime; with a mix of unit-tests and integration-tests built with different tools). You ...
4
votes
2answers
240 views

Am I doing TDD wrong when multiple tests can fail for the same reason?

Assume a method with the following declaration public IList<Location> GetLocations() { ... } I write (at least) the following tests Check to see if the method returns an empty collection if ...
2
votes
3answers
70 views

Unit testing statically loaded data

Scenario: I have a configuration file containing some structured data that is loaded in at runtime and is not modified by the application, but is referenced in many places. There are functions that ...
7
votes
1answer
4k views

How do I decide what testing framework to use?

The situation is this. I'm a junior developer for a small government IT project. We don't have anything of continuous integration or a automated testing framework. But the idea is to be developing ...
0
votes
1answer
200 views

Is testability and mockability really that important in web development?

I'm reading this series on Laravel, and it's in great depth dealing with making everything testable, using Repository instead of just using the Models, using Dependency Injection and other obscure ...
1
vote
1answer
55 views

Testing Facades, Is it a good idea?

I stumbled across a need to create a thin I/O Layer interface to abstract away a class from the need to know about I/O public interface IFileIOProvider { Task WriteFileAsync(String contents, ...
3
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7answers
654 views

Why don't I see many unit test projects that bring up and tear down a DB? (ASP.NET MVC)

I see all the examples that demonstrate unit testing code and mocking the calls to the DB since you are not suppose to touch the DB. But it seems to me having a set up tasks that uses the actually ...
33
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13answers
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Unit-testing of inherently random/non-deterministic algorithms

My current project, succinctly, involves the creation of "constrainably-random events". I'm basically generating a schedule of inspections. Some of them are based on strict schedule constraints; you ...