Questions tagged [unit-testing]
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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Where to push a failing test?
I just changed branch settings on my GitHub repository, so that my [next] branch requires a passing CI build through a pull request.
A discussion followed with a number of team members, about failing ...
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From a TDD perspective, am I a bad person if I test against a live endpoint instead of a mock?
I follow TDD religiously. My projects typically have 85% or better test coverage, with meaningful test cases.
I do a lot of work with HBase, and the main client interface, HTable, is a real pain ...
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At what point would you drop some of your principles of software development for the sake of more money?
I'd like to throw this question out there to interestingly see where the medium is.
I'm going to admit that in my last 12 months, I picked up TDD and a lot of the Agile values in software development....
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Can the Strategy pattern be implemented without significant branching?
The Strategy pattern works well to avoid huge if...else constructs and make it easier to add or replace functionality. However, it still leaves one flaw in my opinion. It seems like in every ...
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Is it useful to unit test methods where the only logic is guards?
Say I have a method like this:
public void OrderNewWidget(Widget widget)
{
if ((widget.PartNumber > 0) && (widget.PartAvailable))
{
WigdetOrderingService.OrderNewWidgetAsync(...
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Adding unit tests to a legacy, plain C project
The title says it all. My company is reusing a legacy firmware project for a microcontroller device, written completely in plain C.
There are parts which are obviously wrong and need changing, and ...
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What should be tested in Javascript?
At work, we've just started on a heavily Javascript based application (actually using Coffeescript, but still), of which I've been implementing an automated test system using JsTestDriver and fabric.
...
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Understanding Cyclomatic Complexity
I've recently come across Cyclomatic Complexity and I'd like to try to understand it better.
What are some practical coding examples of the different factors that go into calculating the complexity? ...
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Is it a good idea to do TDD on low level components?
I'm considering writing a low level driver or OS components/kernels.
The osdev.org folks seem to think that the important bits are not meaningfully testable this way, but I have read some discussions ...
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11
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Getting management approval to invest more in unit testing [duplicate]
I'm a big proponent of unit testing (I'd love to be involved in test driven development). The company I work for seems rather reluctant to spend much effort beyond largely manual end user testing ...
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How do you check that code has been covered automatically?
I am in the process of setting up a Bamboo server for some new projects for a push to TDD in a CI/CD workflow. Sure, unit testing is great, but only as log as it is there.
Now this might be better ...
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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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Unit testing of "workflow" methods
We are currently developing a public API for our app. The methods on this public API are mostly putting together functionality in different corners of the system.
An example would be: (names have been ...
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Unit testing time-bound code
I'm currently working on an application that does a lot of time-bound operations. That is, based on long now = System.currentTimeMillis();, and combined with an scheduler, it will calculate periods of ...
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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 ...
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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; ...
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Is path coverage stronger than condition coverage?
I have encountered (even in literature) two contradicting opinions related to path vs condition coverage (not branch or edge!). Some say Path coverage is stronger than the condition coverage, some say ...
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What is the best practice for refactoring a static method in order to make it more testable?
Let's say you have a static method that looks something like this:
public static bool Foo()
{
var bar = new Bar();
//do some stuff here
}
This method as it stands can be a real headache to ...
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votes
2
answers
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Writing functional tests for a legacy project
I am trying to add a couple of tests to a legacy C project. The project basically consists of a command line tool that prints something to stdout every time an event happens. Now, since writing unit ...
hyperboreean
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7
answers
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What is the objective of unit testing? [duplicate]
Possible Duplicate:
Is unit testing or test-driven development worthwhile?
I've been working with C# for the last 2 years, and I've never done any unit testing. I just need to know what the ...
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6
answers
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Unit Testing with an Optimization Problem
Suppose I'm making an algorithm that identifies the subject of a picture. It could be anything that a computer doesn't do that well, but I'm not expecting to get the right answer every time - 80% is ...
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2
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How to test database dependent functionalities?
I have written this function which checks if a user already exists in the application:
async function ValidateUserExists(username, email){
if(!username || !email) throw new Error('Invalid number ...
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3
votes
2
answers
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Converting static utility class into singleton
In company where I work we have lots of "utility" classes, each has lots of code inside (thousands of lines), and they are all static. And one static methods call anothers. The problem here is that ...
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Code Coverage or Test Brevity?
I've been writing a lot of unit tests lately and have become somewhat obsessed with code coverage. However, I'm struggling justifying going for 100% code coverage, when so many tests would be a ...
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How to write unit tests a method with a result that is highly based on another method [duplicate]
How to write unit tests a method with a result that is highly based on another method ?
async function getStatus(
session,
correlationId,
data
) {
const client = new SomeAPIWrapperClient({
...
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vote
2
answers
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Should I mock a Domain Service?
I am trying to decide whether to introduce mocks in my isolated Domain Model tests. I have a class method similar to this:
public Offer AssignOffer(OfferType offerType, IOfferValueCalculator ...
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vote
2
answers
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Why is white box testing discouraged in OOP?
It seems the general consensus for unit testing classes is to test your object through its public interface only. So if you wanted to test the removeElement method on a LinkedList class you'd need to ...
user275704
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vote
1
answer
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Is it worth writing a unit test for a DTO with the most basic getter/setters? [duplicate]
The advantage is it protects your DTO against future "enhancements" ?
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0
votes
3
answers
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What concept am I missing with private methods and testing? [duplicate]
I've read a lot o blogs arguing about private methods and testing. Some people say you should not test private methods, they say you should make them public or put those methods in a new class.
But ...
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How to not test implementation when method returns void?
Many places in stackexchange state that you should not unit test implementations, only the public interface of a class. But what if the public interface is a method that doesn't return any value, for ...
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answers
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Cheap implementations in fundamental TDD
This is a question concerning the fundamental approach of TDD, so the example below is as simple as possible which might make it seem a little useless; but of course the question applies to more ...
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How to deal with (apparently ?) contradictory testing "good practices"? [closed]
The contradictory "practices" I'm talking about are :
Have a pyramid of tests (with many more unit tests than high-level tests), because high level tests are harder to maintain and slower.
...
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votes
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answers
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Is there such a thing as having too many unit tests?
I have been tasked with writing unit tests for an existing application. After finishing my first file, I have 717 lines of test code for 419 lines of original code.
Is this ratio going to become ...
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How do you write unit tests for code with difficult to predict results?
I frequently work with very numeric / mathematical programs, where the exact result of a function is difficult to predict in advance.
In trying to apply TDD with this kind of code, I often find ...
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votes
8
answers
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How exactly should unit tests be written without mocking extensively?
As I understand, the point of unit tests is to test units of code in isolation. This means, that:
They should not break by any unrelated code change elsewhere in the codebase.
Only one unit test ...
- 1,281
109
votes
12
answers
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Is testable code better code?
I'm attempting to get into the habit of writing unit tests regularly with my code, but I've read that first it's important to write testable code.
This question touches on SOLID principles of writing ...
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Why are unit tests failing seen as bad?
In some organisations, apparently, part of the software release process is to use unit testing, but at any point in time all unit tests must pass. Eg there might be some screen which shows all unit ...
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votes
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Shouldn't unit tests use my own methods?
Today I was watching a "JUnit basics" video and the author said that when testing a given method in your program, you shouldn't use other of your own methods in the process.
To be more specific, he ...
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Is dependency injection essential for unit testing?
Is using dependency injection (DI) essential for unit testing?
I can't think of another alternative for isolating code so it can be tested. Also, all the examples I have ever seen use this pattern. ...
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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
Test-...
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votes
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answers
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Should unit tests be stored in the repository?
I'm a growing programmer who's finally putting unit testing into practice for a library that I'm storing on GitHub.
It occurred to me that I might include the test suites in the repo, but as I look ...
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answers
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If your unit test code "smells" does it really matter?
Usually I just throw my unit tests together using copy and paste and all kind of other bad practices. The unit tests usually end up looking quite ugly, they're full of "code smell," but does this ...
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How should C++ Unit Test code be organized for maximum Unit Test efficiency?
This question is not about Unit Testing Frameworks.
This question is not about writing Unit Tests.
This question is about where to put the UT code written and how/when/where to compile and run it.
...
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votes
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Unit testing methods with indeterminate output
I have a class that is meant to generate a random password of a length that's also random, but limited to be between a defined min and max length.
I'm constructing unit tests, and ran into an ...
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In TDD, should I add unit tests to refactored code?
While refactoring my code using Test Driven Development (TDD), should I keep making new test cases for the new refactored code I am writing?
This question is bases on the following TDD steps:
Write ...
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answers
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How should you TDD a Yahtzee game?
Let's say you're writing a Yahtzee game TDD style. You want to test the part of the code that determines whether or not a set of five die rolls is a full house. As far as I know, when doing TDD, you ...
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Is it bad practice to make methods public solely for the sake of unit testing? [duplicate]
I have a class with a public method. It has other methods that 'assist' with the purpose of the public method. The public method must be tested. However, I also want to unit test the private methods.
...
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votes
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Is Functional Programming a viable alternative to dependency injection patterns?
I have recently been reading a book entitled Functional Programming in C# and it occurs to me that the immutable and stateless nature of functional programming accomplishes similar outcomes to ...
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Should I include tests in Docker image?
When it comes to tests, I can think of two options:
Put both test and application in one image.
Include only application code in the image. Create a test-specific container that builds after the ...
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answers
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Value of using private methods vs all public in classes for internal software for ease of unit testing [duplicate]
Here's a skeleton of a class I built that loops through and deduplicates data - it's in C# but the principles of the question aren't language specific.
public static void DedupeFile(FileContents fc)
{...
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