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

learn more… | top users | synonyms (1)

9
votes
6answers
2k views

Why did Java make package access default?

I'm asking this question because I believe they did it for a very good reason and that most people do not use it properly, well from my experience in industry so far anyway. But if my theory is true ...
2
votes
3answers
248 views

How should I go about bringing this code under test?

I'm working on an open-source test framework. 90% of my codebase has good test coverage. My main problem area is the command-line entry point. This module began life as a very short script for ...
2
votes
1answer
586 views

How to unit test a web client?

I am having a lot of trouble understanding how to unit test my web client. I have just finished a project using TDD for the first time - this project hd no external dependencies such as API calls or ...
1
vote
3answers
499 views

Unit Testing Wrapper (Facade?) Method

I have to write unit tests for some classes my group is developing. The classes are fairly simple, and I'm not sure how to best test them. public class MyObjectRegistry { private ...
1
vote
3answers
94 views

Is it okay to test multiple similar files in one functional test

I've a functional test using Junit which tests delivery of xml file to an end-point. XML file is sent by client, so I copied it to a test folder, read it from there in my test and do asserts. We ...
20
votes
2answers
606 views

How do I create an environment where fixing tests is seen as a priority?

I am a software engineer at a medium sized company. We have a fairly robust testing platform running on TeamCity. It does unit tests on every checkin, and a daily unit test/BVT run. The problem is ...
2
votes
2answers
465 views

Unit testing to prove balanced tree

I've just built a self-balancing tree (red-black) in Java (language should be irrelevant for this question though), and I'm trying to come up with a good means of testing that it's properly balanced. ...
3
votes
1answer
144 views

unit testing on ARM

We are developing application level code that runs on an ARM processor. The BSP (low level code) is being delivered by a 3d party so our code sits just on top of this abstraction layer (code is ...
2
votes
2answers
389 views

Unit-testing code that relies on untestable 3rd party code [duplicate]

Sometimes, especially when working with third party code, I write unit-test specific code in my production code. This happens when third party code uses singletons, relies on constants, accesses the ...
0
votes
3answers
95 views

How can I unit test that a class uses a trait in the expected manner?

A class has a trait. The class is expected to call a function provided by the trait during a certain method invocation. How do I write a unit test to ensure that that happens? The difficulty, to ...
4
votes
2answers
348 views

Looking for a very subtle unit testing example [closed]

In the context of Continuous Integration, I need to teach unit testing to a 20-people audience of programmers. Everything will be all right, but I am still trying to find the perfect unit testing ...
2
votes
2answers
268 views

Why is it not standard to implement abstraction layers for the file system?

I have been taught to access databases through abstraction layers. I was wondering why it is not also standard practice to access the file system through an abstraction layer? It seems to me unit ...
0
votes
1answer
255 views

how to architect this to make it unit testable

I'm currently working on a project where I'm receiving an object via web service (WSDL). The overall process is the following: Receive object -> add/delete/update parts (or all) of it -> and return ...
0
votes
2answers
79 views

Area of testing

I'm trying to understand which part of my code I should to test. I have some code. Below is example of this code, just to understand the idea. Depends of some parametrs I put one or another currency ...
0
votes
1answer
122 views

unit level testing, agile, and refactoring [duplicate]

I'm working on a very agile development system, a small number of people with my doing the vast majority of progaming myself. I've gotten to the testing phase and find myself writing mostly ...
0
votes
1answer
78 views

Test Doubles : Do they go in “source packages” or “test packages”?

I've got a couple of data access objects (DefaultPersonServices.class, DefaultAddressServices.class) which is responsible for various CRUD operations in a database. A few different classes use these ...
3
votes
2answers
237 views

Unit Testing of JavaScript - Are we testing the logic of the code or the behavior against a browser

[Warning]: I am new to the whole unit testing and have been trying to learn as much as possible. I am working on a MS CRM 2011 project and I have been trying to introduce unit testing in my company. ...
1
vote
1answer
986 views

How to create unit/integration tests for my web app?

I am currently developing an Ajax chat application that uses PHP on the back-end. Some of the features it has right now are different types of users (admin/mod/banned), public and private rooms, ...
5
votes
1answer
240 views

How much mocking is “just right?”

I titled the question jokingly because I'm sure that "it depends," but I have some specific questions. Working in software that has many deep layers of dependency, my team has become accustomed using ...
8
votes
3answers
4k views

How can I unit test a class which requires a web service call?

I'm trying to test a class which calls some Hadoop web services. The code is pretty much of the form: method() { ...use Jersey client to create WebResource... ...make request... ...do ...
5
votes
4answers
513 views

Test Driven Development: A good/accepted way to test file system operations?

I am working on a project at the moment that generates a table (among other things) based on the contents of a file-system, and and in turn does some meta-data modifications on the things it finds. ...
3
votes
6answers
238 views

How does TDD address interaction between objects?

TDD proponents claim that it results in better design and decoupled objects. I can understand that writing tests first enforces the use of things like dependency injection, resulting in loosely ...
3
votes
3answers
234 views

Are branches in unit tests bad practice?

Say I want to assert that a certain option menu is displayed in the front-end of a project. The menu is on screen X and I have to first select data in Y to get to X. Now, it doesn't matter at all what ...
1
vote
1answer
210 views

Unit-testing databases: test all possible permutations of read and write to table?

I am testing a resource management class that is interacting with a database or a file system, or a combination of both. I was wandering if it is the norm to test all possible permutations of read and ...
19
votes
3answers
1k views

Difficulties With TDD & Refactoring (Or - Why Is This More Painful Than It Should Be?)

I wanted to teach myself to use the TDD approach and I had a project I had been wanting to work on for a while. It wasn't a large project so I thought it would be a good candidate for TDD. However, I ...
2
votes
1answer
161 views

Rethinking testing strategy

Working on Plone projects our team tries to achieve full test coverage at least for important products. The kind of tests we write are unit tests, functional tests and integration tests. (Also ...
15
votes
5answers
1k views

Should you hard code your data across all unit tests?

Most unit testing tutorials/examples out there usually involve defining the data to be tested for each individual test. I guess this is part of the "everything should be tested in isolation" theory. ...
3
votes
4answers
494 views

Is spying on tested class bad practice?

I am working on a project where class internal calls are usual but the results are many times simple values. Example (not real code): public boolean findError(Set<Thing1> set1, ...
1
vote
1answer
1k views

Generic repository unit testing best practice?

How can I unit test my generic repository? Unit testing code: [TestClass] public class UnitTestLanguage { private IUnityContainer _unityContainer; private IUnitOfWork _uow; private ...
13
votes
1answer
1k views

How do I test a file reader?

I am working on a project with a few file formats. Some formats are specified by .xsds, others by documentation on their respective websites, and some are custom in-house formats that have no ...
1
vote
1answer
201 views

Unit testing methods which access an Internet API

Hi I'm developing a Wordpress plugin which accesses a couple of API's (Amazon Product API, Flickr, Freebase, Ebay). I've already started writing unit tests for it but I'm still wondering if its ...
1
vote
2answers
300 views

Is there a better way to organize my module tests that avoids an explosion of new source files?

I've got a neat (so I thought) way of having each of my modules produce a unit-test executable if compiled with the -DTESTMODULE flag. This flag guards a main() function that can access all static ...
0
votes
2answers
114 views

How to do you judge the value of using TDD or plain unit testing in an Open Source project? Is there a good rule of thumb? [duplicate]

In my current OSS project, I knew literally nothing about what I was doing when I began. I was integrating with a larger project as a plugin, and that in and of itself had a steep learning curve. If ...
7
votes
1answer
284 views

How to use BDD to unit test a compiler?

My team is writing a compiler for a domain-specific language (DSL) which will be integrated into an IDE. Right now, we are focused on the analysis phase of the compiler. We are not using any existing ...
3
votes
5answers
640 views

Best practice for code coverage of empty interface methods

Given a class that implements an interface, but does not need all of the methods implemented, what is the best practice for unit testing this class with respect to code coverage? - or is it considered ...
4
votes
4answers
400 views

Good unit-testing story for a unit test training [closed]

I have to advise a training on unit testing in my company. I would like to show a striking, real-life example of an unexpected regression not caught by compilation (of course) but detectable with ...
1
vote
3answers
119 views

Unit Test passing conditions as well as failing conditions?

Should unit tests test passing all cases as well as all failing cases? For example, imagine I have a test Widget_CannotActiveWidgetIfStateIsCancelled. And let's say there are 25 possible states. ...
1
vote
2answers
138 views

Understanding unit testing for dynamically changing condition

I was trying to understand how to write unit tests for a few days now. I'm confused with following scenarios in the existing code. In first function the max value changes depending on the object ...
5
votes
3answers
351 views

How should I unit-test a class that relies on having realistic data?

I have a class that encapsulates the results of a scientific measurement. I’m building in unit tests from the beginning, but I don’t have a lot of experience with unit testing and I’m not sure which ...
-2
votes
4answers
172 views

How to use unit testing? [duplicate]

How to use unit testing? There are a lot of frameworks for different languages, which provide functionality of unit testing. There is a lot of information on how to use each of them technically. Just ...
8
votes
3answers
429 views

Doesn't single-assert unit testing break the DRY principle?

Whenever I write unit tests I have always tried to have a single assert per test to make debugging easier when tests fail. However as I follow this rule I feel like I am constantly copying the same ...
3
votes
2answers
256 views

Advise how to write a simple test for this javascript snippet?

I'm trying to start unit testing (not using any testing frameworks) for my javascripts. Here's one example of it. var obj = {}; obj.disableBtn = function ($btn, style) { ...
0
votes
1answer
118 views

Method visibility for testing partial mocks

I'm currently writing unit tests to test behavior of a method and would like to partially mock the methods calling injected properties. For example: public void doSomething() { int complicatedInt ...
4
votes
1answer
438 views

What to test when building websites using CMS?

My job is mainly building websites using CMS such as Drupal, eZPublish or Magento. Most of the work is templating, CRUD and adhering to the specs with this. Occasionally, there is some ...
48
votes
7answers
3k 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 ...
2
votes
2answers
488 views

Should I bother to write unit test for UI/UX Components?

So I am building an application with Angular and have started to get into UI testing with DalekJS (http://dalekjs.com). As I have been writing these tests I have been thinking to myself, should I ...
2
votes
2answers
387 views

Unit Tests work but there are still bugs?

Brief History I am new to Automated Unit Testing and Mocking objects world; previously we used to do Unit Testing (including Integration Testing and we mistakenly referred that as Unit Testing) ...
6
votes
6answers
2k views

Unit-Tests and databases: At which point do I actually connect to the database?

There are answers to the question on how test classes that connect to a database, e.g. "Should service test classes connect ..." and "Unit testing - Database coupled app". So, in short let's assume ...
2
votes
2answers
255 views

Unit testing and coupling

As a developer I should strive for low coupling between classes. But low coupling doesn't mean "No coupling" so sometimes I have to allow some code flexibility and use "new" inside a domain model. ...
6
votes
4answers
505 views

I have 200k lines of poorly designed code, will units tests or integration tests be more valuable? [duplicate]

I've inherited a lot of poorly designed code; the code has no tests. I am putting tests in place before I attempt a major refactor, but I have run into a problem with my unit tests. The problem is, I ...