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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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 ...
9
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2answers
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How to unit test method that returns a collection while avoiding logic in the test

I am test-driving a method that is to generate a collection of data objects. I want to verify that the properties of the objects are being set correctly. Some of the properties will be set to the same ...
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5answers
841 views

How can I test parts of my application against the output of third party application?

I have a fairly new C# application, approximately 6 months old, that we are now trying to incorporate testing into. (Should have been done from the start but I can't change the past) Parts of this ...
4
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1answer
391 views

How to keep unit tests independent?

I've read it at many places that unit tests should be independent. In my case I have a class that does data transformation. These steps must be done sequentially, otherwise they don't make sense. For ...
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2answers
309 views

How do you test database abstraction in PHP?

I apologise in advance if this question is too subjective but I'm struggling to find a good answer, probably as there is not really a correct answer to give. I'm currently writing a database ...
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3answers
737 views

What would help when refactoring a large method to ensure that I don't break anything?

I'm currently refactoring a part of a large codebase with no unit tests whatsoever. I tried to refactor code the brute way, i.e. by trying to guess what the code is doing and what changes wouldn't ...
4
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2answers
423 views

What is the most appropriate testing method in this scenario?

I'm writing some Objective-C apps (for OS X/iOS) and I'm currently implementing a service to be shared across them. The service is intended to be fairly self-contained. For the current functionality ...
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4answers
506 views

Unit Test code generation

We have a project that was written over a period of 2 years, but has a poorly designed architecture and not unit tests. The software works well, but we're at the point where we want to refactor some ...
2
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1answer
334 views

Why do we write our specs in different files from our source?

The D Programming Language supports writing unit tests inline with source. There's a Ruby gem called test_inline that lets you write specs in the same file as your code. Why is it generally ...
4
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2answers
435 views

Testcase runner for parametrized testcases

Let me explain my situation. I'm planning a kind of test case runner for doing testcases on external devices, which are microcontroller based. Lets consider the devices: Device 1 Device 2 There ...
3
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4answers
965 views

How to determine most challenging test-cases to test any algorithm?

While solving any problem, we write algorithms. Some efficient, some not, some work, some fail. But sometimes we end up writing something which is mostly a success when we do a dry test run, perhaps, ...
3
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1answer
137 views

Unit Testing and “Fit”

I am reading Cristopher Alexander's "Notes on the Synthesis of Form", and he is describing a solution to a problem as having good fit, when there is an absence of bad fit; we can't describe all of the ...
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3answers
424 views

If functional testing is referred as black box..how can it be done on unit test level?

Preparing myself for ISTQB, I found a bit odd many things in their textbooks. E.g. they call black box testing as functional testing when you are not concerned with structured but only observe the ...
9
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4answers
989 views

In Unit Testing, why would I create a Repository twice?

The other day I was reading a little about Unit Testing and I saw some examples where people create a repository interface (i.e. IExampleRepository) and then create the real repository (public class ...
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1answer
954 views

How to write unit tests without mocking data

My design doesn't allow me to mock the data so I am using sqlite as test database that has minimum data to run the unit tests. Below is the pseudo code //Method to be tested public IList<Funds> ...
2
votes
2answers
297 views

How to unit test code which is intended to have different results on different platforms

I noticed some duplicate code in a codebase I am working on that appended a filename to a directory path, so I decided to refactor it into its own method. The application I am working on is not well ...
1
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3answers
542 views

Unit-testing functions without business logic (only checks) [duplicate]

My team is trying to find out the best way to test one of our components; the main scope is to check if the user/actor has the right to complete the operation requested. The component is formed by ...
4
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5answers
5k views

Understanding unit tests/TDD for ASP.NET webforms [closed]

I'm the lead programmer at a small software firm (currently 4 developers including myself), we develop bespoke ASP.NET WebForms applications for businesses. I joined there in 2010 just after ...
7
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1answer
9k views

How can I unit-test my REST web service?

I am new to unit testing, I've one REST web method that just calls DB and populates a DTO. Pseudo code is public object GetCustomer(int id) { CustomerDTO objCust = //get from DB return objCust; } ...
2
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5answers
569 views

Unit test cases(JUnit), not by developer but other team members

I have a very interesting situation. Management has strictly asked to do unit testing for the code being developed and divided the task in such a way that few are developing the code and others are ...
2
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1answer
793 views

JUnitEE vs JUnit

I know what unit testing is in general and what JUnit is in particular. But here I see that there is a project called JUnitEE which seems to me to be a wrapper over JUnit. So I would like to better ...
8
votes
4answers
937 views

In TDD, if I write a test case that passes without modifying production code, what does that mean?

These are Robert C. Martin's rules for TDD: You are not allowed to write any production code unless it is to make a failing unit test pass. You are not allowed to write any more of a unit test than ...
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3answers
159 views

What should a test method test? [closed]

Suppose we're unit testing a class with xUnit-like framework - so a test class is created for class-under-test. Now, how much should be tested by individual test methods? Should there be one-to-one ...
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5answers
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Unit Testing in a “no setter” world

I do not consider myself a DDD expert but, as a solution architect, do try to apply best practices whenever possible. I know there is a lot of discussion around the pro's and con's of the no (public) ...
0
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2answers
505 views

Should I use TDD and BDD if my project is changing fast?

I have my own little project I am creating using RoR, I plan it to have small-medium load. With no doubt I started with BDD and TDD (Cucumber and RSpec to be exact, but I am also experienced with ...
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3answers
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Is there any real value in unit testing a controller in ASP.NET MVC?

I hope this question gives some interesting answers because it's one that's bugged me for a while. Is there any real value in unit testing a controller in ASP.NET MVC? What I mean by that is, most ...
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4answers
265 views

How do I test my validation without being too much perfectionist, yet to leave most part of logic tested?

For example I would like to validate that name is letters only and is between 4 and 14 letters length. I have the following code in model: validates: name, :format => { :with => /^[a-zA-Z]+$/, ...
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1answer
857 views

Is there a modern replacement for a mutation testing tool like Jester for Java?

“Why just think your tests are good when you can know for sure? Sometimes Jester tells me my tests are airtight, but sometimes the changes it finds come as a bolt out of the blue. Highly ...
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2answers
227 views

Do I need to learn python first to understand the part 2 of the book Test Driven development?

It seems like Python is used as a coding language for part 2 of Kent Beck's book Test Driven Development. I have read the first part of that book and started appreciating the value of TDD . First part ...
9
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6answers
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Testing a REST client against a REST Server. How to do fixtures?

When writing unit tests, it's common to use fixtures: little testable data, so we can say: 1. Get all clients should include Willy Wonka. 2. Delete client 3, and now get clients should not include ...
14
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3answers
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Brittle unit tests due to need for excessive mocking

I've been struggling with an increasingly annoying problem regarding our unit tests that we are implementing in my team. We are attempting to add unit tests into legacy code that wasn't well designed ...
2
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2answers
280 views

Building automated unit tests for tools which don't have an xUnit implementation

Preamble I have been bitten by the bug of automated unit testing. I feel the benefits and the confidence in a code base it can deliver. I am also feel I have a reasonable intuition as to what parts ...
9
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1answer
572 views

Unit testing in Django

I'm really struggling to write effective unit tests for a large Django project. I have reasonably good test coverage, but I've come to realize that the tests I've been writing are definitely ...
2
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2answers
270 views

Mock up class object

For example I have class ItemDownloader which has method downloadItem. This method creates instance of another class - Download to perform actual downloading. Question is: I want to test ...
4
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3answers
751 views

How to invoke anonymous functions in testing?

Below is Java code. I need to cover the below function. I searched for many websites, but I still have no ideas. Is there any methods to cover the override anonymous classes? public static void ...
8
votes
1answer
977 views

Unit testing on visualization (3D graphics) frameworks

This is a follow up to this question. There I was asking how to do unit testing when you have a library of scientific algorithms. I have a similar problem now but with a different project. I'm ...
12
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3answers
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Best way to unit test methods that call other methods inside same class

I was recently discussing with some friends which of the following 2 methods is best to stub return results or calls to methods inside same class from methods inside same class. This is a very ...
7
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1answer
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Unit testing for a scientific computing library

I've had a bit of experience with unit testing before, in what I call (not pejoratively) the classic software engineering project: an MVC, with a user GUI, a database, business logic in the middle ...
69
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11answers
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Is there a reason that tests aren't written inline with the code that they test?

I've been reading a bit about Literate Programming recently, and it got me thinking... Well-written tests, especially BDD-style specs can do a better job at explaining what code does than prose does, ...
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2answers
384 views

JavaScript…what to unit test [duplicate]

I would like to hear other people's opinion on what to unit test in JavaScript. I've been thinking about it and experimenting and let me present what seems to me the right thing. First of all, in ...
0
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3answers
476 views

Is there an accepted name for a fake object injected via a preprocessor seam?

I am dealing with some old, sloppy C++ code in which there is a structure with a lot of data members and functions. I want to test a class that I have implemented which uses the struct, but this ...
12
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1answer
881 views

Should I write a test to prove that deleting code fixes a bug?

Occasionally I'll run into the situation where fixing a bug requires that I delete a section of code. The TDD purist would (I assume) advocate writing a failing test, deleting the code, then watching ...
2
votes
2answers
201 views

Should I split out synchronization from my class and what's it called?

When thinking about testability and modular code, I recently thought about whether I should split out the synchronization part of a class from the actual behavior part. By example: The app "needs" ...
7
votes
6answers
813 views

How do you unit test an encoder?

I have something like this: public byte[] EncodeMyObject(MyObject obj) I've been unit testing like this: byte[] expectedResults = new byte[3]{ 0x01, 0x02, 0xFF }; Assert.IsEqual(expectedResults, ...
6
votes
2answers
270 views

How to do unit tests on a method that takes the elapsed time into account?

I'm currently in the middle of refactoring an important method in a legacy-system. There were almost zero test until I've started working on it, and I've added quite a lot to ensure the correct work ...
5
votes
2answers
2k views

Event Driven Programming: A sequence of unfortunate events

I have a very basic game loop whose primary purpose is to check for updates & changes to a list. I have contemplated using event driven programming to replace the game loop/list idea with an ...
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3answers
698 views

Relative value of manual vs automated testing

The organisation I work for has recently employed a testing officer to run manual tests, but when I asked about being given time as a developer to write unit tests the response was that the manual ...
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2answers
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Should I refactor my unit tests when I extract a class out of the System Under Test?

I wrote this class that does a few things (perhaps this is a violation of the Single Responsibility Principle). I realize now that some other part of the project needs a piece of that logic and the ...
5
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2answers
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When to write Unit Tests : Is there any or list of terms to take right decision [closed]

To write Unit Tests we have to write extra bits of code. For several projects we do Unit Tests and for several projects we do not. As a Team Leader I face trouble to make the right decision. Is ...
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2answers
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Helper static methods in TDD

I am creating an application which will be testable(unit + integration). In this application I have a FileHelper static class, public static class FileHelper { public static void ...