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 have Guava unit tests been generated automatically?

Guava has unit test cases automatically generated: Guava has staggering numbers of unit tests: as of July 2012, the guava-tests package includes over 286,000 individual test cases. Most of ...
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Where should I draw the line between unit tests and integration tests? Should they be separate?

I have a small MVC framework I've been working on. It's code base definitely isn't big, but it's not longer just a couple of classes. I finally decided to take the plunge and start writing tests for ...
0
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4answers
343 views

Is it dangerous to substitute unit tests for user testing? [closed]

Is it dangerous to substitute unit tests for user testing? A co-worker believes we can reduce the manual user testing we need to do by adding more unit tests. Is this dangerous? Unit tests seem to ...
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4answers
357 views

Are injectable classes allowed to have constructor parameters in DI?

Given the following code: class ClientClass{ public function print(){ //some code to calculate $inputString $parser= new Parser($inputString); $result= ...
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5answers
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Do unit tests sometimes break encapsulation? [duplicate]

I very often hear the following: "If you want to test private methods, you'd better put that in another class and expose it." While sometimes that's the case and we have a hiding concept inside our ...
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4answers
402 views

What are best practices for testing programs with stochastic behavior?

Doing R&D work, I often find myself writing programs that have some large degree of randomness in their behavior. For example, when I work in Genetic Programming, I often write programs that ...
4
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6answers
491 views

Pair programming and unit testing

My team follows the Scrum development cycle. We have received feedback that our unit testing coverage is not very good. A team member is suggesting the addition of an external testing team to assist ...
2
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3answers
369 views

What does well written, readable tests look like? [closed]

Doing unit testing for the first time at a large scale, I find myself writing a lot of repetitive unit tests for my business logic. Sure, to create complete test suites I need to test all ...
2
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2answers
258 views

Returning a mock object from a mock object

I'm trying to return an object when mocking a parser class. This is the test code using PHPUnit 3.7 //set up the result object that I want to be returned from the call to parse method ...
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3answers
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How important are unit tests in software development? [closed]

We are doing software testing by testing a lot of I/O cases, so developers and system analysts can open reviews and test for their committed code within a given time period (e.g. 1 week). But when ...
4
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4answers
184 views

How to implement isValid correctly?

I'm trying to provide a mechanism for validating my object like this: class SomeObject { private $_inputString; private $_errors=array(); public function __construct($inputString) { ...
7
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6answers
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Should we exclude code for the code coverage analysis?

I'm working on several applications, mainly legacy ones. Currently, their code coverage is quite low: generally between 10 and 50%. Since several weeks, we have recurrent discussions with the ...
3
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1answer
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Using Mock for event listeners in unit-testing

I keep getting to test this kind of code (language irrelevant) : public class Foo() { public Foo(IDependency1 dep1) { this.dep1 = dep1; } public void setUpListeners() { ...
6
votes
4answers
550 views

Achieving decoupling in Model classes

I am trying to test-drive (or at least write unit tests) my Model classes but I noticed that my classes end up being too coupled. Since I can't break this coupling, writing unit tests is becoming ...
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3answers
655 views

unit/integration testing web service proxy client

I'm rewriting a PHP client/proxy library that provides an interface to a SOAP-based .Net webservice, and in the process I want to add some unit and integration tests so future modifications are less ...
3
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5answers
809 views

“TDD is about design, not verification”; concretely, what does that mean?

I've been wondering about this. What do we exactly mean by design and verification. Should I just apply TDD to make sure my code is SOLID and not check if it's external behaviour is correct? Should ...
6
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1answer
166 views

Unit testing a text index

Consider a text index such as a suffix tree or a suffix array supporting Count queries (number of occurrences of a pattern) and Locate queries (the positions of all the occurrences of a pattern) over ...
6
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7answers
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Is mocking for unit testing appropriate in this scenario?

I have written around 20 methods in Java and all of them call some web services. None of these web services are available yet. To carry on with the server side coding, I hard-coded the results that ...
1
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3answers
490 views

Introduce unit testing when codebase is already available [duplicate]

Possible Duplicate: Best practices for retrofitting legacy code with automated tests I've been working on a project in Flex for three years now without unit testing. The simple reason for ...
4
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1answer
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How to unit test image processing code?

I'm working in image processing (mainly OCR) and I wonder how I should integrate unit tests in my development. I'm already using unit tests for more "common" type of code but when dealing with image ...
25
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4answers
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TDD - Outside In vs Inside Out

What is the difference between building an application Outside In vs building it Inside Out using TDD? These are the books I read about TDD and unit testing: Test Driven Development: By Example ...
7
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4answers
773 views

Unit testing and Test Driven Development questions

I'm working on an ASP.NET MVC website which performs relatively complex calculations as one of its functions. This functionality was developed some time ago (before I started working on the ...
0
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3answers
384 views

What's wrong performing unit test against concrete implementation if your frameworks are not going to change?

First a bit of background: We are re-architecting our product suite that was written 10 years ago and served its purpose. One thing that we cannot change is the database schema as we have 500+ client ...
2
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3answers
623 views

TDD, BDD or both? [duplicate]

I'm a little bit confused about BDD. I'm doing TDD currently. My question is whether BDD is complementary to TDD or it's a whole new thing and my team should do both TDD and BDD? Or is it enough to ...
2
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5answers
549 views

Resurrecting a 5,000 line test plan that is a decade old

I am currently building a test plan for the system I am working on. The plan is 5,000 lines long and about 10 years old. The structure is like this: 1. test title precondition: some W needs to ...
2
votes
2answers
710 views

Which Continuous Integration for Selenium 2 with TestNG

So I have a Selenium Automation project (using Maven). I'd like to be able to set my tests to run overnight and possibly email a report daily to the team. Which CI would be most suitable for ...
3
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3answers
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iOS - Unit tests for KVO/delegate codes

I am going to design a MVC pattern. It could be either designed as a delegate pattern, or a Key-Value-Observing(KVO), to notify the controller about changing models. The project requires certain ...
3
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3answers
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How do I make code bound to an ORM testable?

In Test Driven Development, how do I make code bound to an ORM testable? I am using a Micro-ORM (PetaPoco) and I have several methods that interact with the database like: AddCustomer UpdateRecord ...
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5answers
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How to unit test a function that is refactored to strategy pattern?

If I have a function in my code that goes like: class Employee{ public string calculateTax(string name, int salary) { switch (name) { case "Chris": ...
7
votes
1answer
377 views

Who should initialize dependencies in a TDD application?

I'm trying to learn implementing TDD with mocking/fake objects. One of the questions I have is how to initialize a dependency in an application which implements TDD? An example from this article ...
3
votes
1answer
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Linux OS developers : do they unit test their code? [closed]

Linux OS developers : do they unit test their code ? If yes : since this OS is coded in C, how do they manage to write effectively unit tests in this language ? what are the "zones" in OS where ...
7
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5answers
627 views

Is it typical for a unit test suite to be larger than the code it tests? [duplicate]

Possible Duplicate: What is a normal “functional lines of code” to “test lines of code” ratio? I've found that more often than not, when you write lots of unit ...
0
votes
4answers
481 views

What Are Some Tips For Writing A Large Number of Unit Tests? [closed]

I've recently been tasked with testing some COM objects of the desktop app I work on. What this means in practice is writing a large number (>100) unit tests to test different but related methods and ...
9
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2answers
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Unit Testing: “It's a code smell if you're refactoring and there are no collaborators”?

I'm reading The Art of Unit Testing by Roy Osherove. I'm at section 7.2 Writing maintainable tests where the author has this note about code smell: NOTE: When you refactor internal state to be ...
7
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5answers
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Can unit testing software be used to unit test itself?

QUnit advertises itself on its web page like this: ...capable of testing any generic JavaScript code, including itself! Can you really use unit testing software to test itself? Wouldn't defects ...
2
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4answers
306 views

Standards of unit testing output

Simple question, what's more common / standard / won't make future developers look at me cross-eyed for unit testing: Displaying just the errors, or reporting every passed test?
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2answers
511 views

Unit Tests code duplication?

How can I avoid code duplication in unit tests? Using Java and JUnit suppose I have something like this: public interface Arithmetic<T> { public T add(T a, T b); public T sub(T a, T ...
82
votes
12answers
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How big does my project need to be for me to unit test it? [closed]

I assume that my project is decoupled enough to allow for unit testing. But how big, exactly, in terms of clases and functions does my project need to be to make unit testing worthwhile? We all make ...
2
votes
2answers
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Testing my VB.NET code?

I'm having trouble developing unit testing approaches to testing both if the "code does what I want it to do", and testing "does my code work". For example, I'm writing code to validate input that ...
4
votes
4answers
319 views

What level do I mock when I have function A calling function B which calls the database?

I have created a scenario in which I have two functions, A and B, both are tested, but despite the tests I still injected a rather stupid bug and some data is not getting into the database. Note that ...
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9answers
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As a professional developer, is it acceptable to not write unit tests? [closed]

Just wondering on the pros and cons on TDD/automated unit testing and looking for the community's view on whether it's acceptable for professional developers to write applications without supporting ...
3
votes
3answers
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Writing Unit Tests for a Class That Starts External EXE

I wrote a C# class that is used to start a list of EXEs (not one of mine - third party EXEs I have to run) and keep them running (will check occasionally to make sure it is still running, and start ...
1
vote
1answer
328 views

How best to enable a web service consumer to integration test a transactional web service?

I want to allow consumers of a web services layer (web services are written in Java) to create automated integration tests to validate that the version of the web services layer that the consumers ...
5
votes
6answers
434 views

Sporadic unittests or TDD?

I've read some basics about unit tests and TDD, but I find it hard to convince myself why TDD can have an advantage over only selected unittests. I've read common arguments for TDD, but don't see the ...
7
votes
4answers
655 views

Do some best practices depend on skill?

Is there evidence that some software development best practices depend on programming skill level? I mean, these methods are good, but maybe the way the are used or the extent might vary? This ...
3
votes
2answers
287 views

Reusing Mocks/Stubs as Test Specification

We use mock to ensure that a unit test only runs against the code that should be tested. This prevents that a bug in a module A causes tests of a dependent module B to fail. However, now we also have ...
1
vote
1answer
629 views

scons and python unit tests best practices

I am using scons to build a large project containing a mix of C++ and Python. I would like scons to run Python unit tests either using nose or not. Currently, we have a long list of tests files and ...
4
votes
4answers
549 views

Do large test methods indicate a code smell?

I have a particular method called TranslateValues() (Cyclomatic-Complexity of 5) which I would like to test. The test requires a substantial number of mock objects which take up most of the method; ...
87
votes
18answers
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Are unit tests really that useful? [closed]

I just graduated with a degree in CS and I currently have a job as a Junior .NET Developer (C#, ASP.NET, and web forms). Back when I was still in university, the subject of unit testing did get ...
7
votes
4answers
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How should I test my TEST code?

One of the few things that most software developers agree on is that you shouldn't rely on code to work correctly unless you test it. If you don't test it, it may have hidden bugs that are only ...