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 to write unit tests for a piece of code that has a data context?

I am new to unit testing and using Microsoft's unit testing library for following piece of code. When I execute the code normally it executes fine, however when I run unit test written for this code I ...
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1answer
170 views

Unit testing a template class after refactoring

I am cleaning up my code by way of removing duplicates, and found two classes that were almost identical, out of 55 lines, only a single predicate in an if statement differed between them. Both ...
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1answer
103 views

Where does test fixture code fit in?

This is an unusual question since I don't believe it lends itself to typical software development practices but I hope you can prove me wrong. In MATLAB, my team have created several signal ...
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399 views

How do I unit test a heuristic algorithm?

Say we have our route finding algorithm: def myHeuristicTSP(graph): /*implementation*/ return route Now we want to unit test this: class TestMyHeuristicTSP: def ...
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1answer
177 views

How to test network connectivity API using TDD?

I'm currently trying to add TDD on my workflow. I fail to create tests where I can easily test a library that requires remote connections. More precise, my program uses snmp4j library. Currently I'm ...
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1answer
95 views

Starting a big application with unit testing [closed]

I am learning test driven develeopment and read some books about TDD. I learned rules of unit testing. How can I write unit test, how can I select test method names, Act, Assert, Action and like this. ...
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429 views

Workaround for unit testing Core Data in Swift

I am still pretty new to programming, but my first app was recently approved and is now for sale on the App Store. My app uses Core Data and is written in Swift. After some initial difficulties, I ...
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5answers
225 views

How do you unit test a function that clears properties?

I have a very common function that I have always unit tested in the same way, but I'm wondering if there is a better solution or if it's even possible a code smell is involved. It seems like a very ...
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2answers
282 views

Unit testing and reality [closed]

I m actually studying Unit testing, reading some articles on the internet and trying to understand how it works exactly, but it's not very clear for me actually. What should I test ? I have seen ...
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2answers
181 views

Test Driven Development when the specifications change

These days, it's fairly common for me to be tasked to make a change that actually breaks the prior spec. I know that one of the major ideas behind TDD is to have a suite that verifies all your changes ...
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1answer
134 views

Java Unit testing multiple test cases in one test [duplicate]

Is it good practice to have multiple test cases in one test or should I always create one test for single test case in every situation even if it is redundant? Why?
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7answers
790 views

How do you unit-test code using graphs?

I am writing (recursive) code that is navigating a dependency graph looks for cycles or contradictions in the dependencies. However, I am not sure how to approach unit testing this. The problem is ...
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1answer
118 views

Can JUnit be used to test this project?

I currently have an interesting situation occurring with my code, and after hacking away at what turned out to be a dead end for the last two weeks, I'm here asking those smarter than I to educate me ...
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2answers
230 views

Separate code coverage reports for unit and integration tests, or one report for both?

Should there be a separate code coverage report for unit and integration tests, or one code coverage report for both? The thinking behind this is that code coverage allows us to make sure that our ...
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3answers
1k views

How to test when arranging the data is too cumbersome?

I am writing a parser and as a part of that, I have an Expander class that "expands" single complex statement into multiple simple statements. For example, it would expand this: x = 2 + 3 * a ...
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1answer
186 views

Unit test approaches other than test-first and test-last? And what about variants of them? [closed]

I'm wondering if there are other approaches, old or new, to writing unit tests, and how viable they are, other than the traditional and tdd unit testing approaches. I know there is behavior-driven ...
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2answers
162 views

Should you mock key-value stores/aggregators

I've always been taught that your tests should run in isolation, and other than a db for ActiveRecord etc., your tests should not rely on any external software/services. e.g. I always mock my other ...
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2answers
66 views

Unit testing the variables passed to the view from the controller

Let's say I want to test a controller that gets some value from a service and then pass some of all of those values to the view. Do you test that the view gets the result that the controller took ...
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5answers
1k views

Sharing development test cases (unit and development integration) with the QA (test) team?

The testing team (the so-called QA team in some organizations) insists that the development team should share their (the development team's) test cases with them. Their arguments are that the ...
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1answer
253 views

how to test a generator with unittest?

I have programmed a small iterator in Python: class anything(): def __init__(self): self.i=1 def __iter__(self): return self def next(self): if self.i>100: ...
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4answers
842 views

How to do Test Driven Development

I have just 2+ years of experience in application development. In those two years my approach towards development was as following Analyze requirements Identity Core component/Objects, Required ...
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3answers
211 views

What's the idea behind mocking data access in unit tests [duplicate]

I understand that you're not actually supposed to hit the database or disk when doing unit tests... Why is that? Also, taking something like Moq, what is it actually supposed to mock and where? For ...
2
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1answer
296 views

2 questions about TDD

I'm just starting to get to grips with TDD, and I have 2 quick questions; I'm assuming that if I were writing software for a software company, that TDD would work alongside the software design? i.e ...
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2answers
293 views

Mocking the context of application

We have a context of the application which is a static class named Holder containing several static properties initialized by objects that are used throughout the application. All over the unit tests ...
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6answers
618 views

When should you start unit testing? (during which development stage?)

I'm currently learning about unit testing, specifically JUnit (with Java). Searching the web I see many threads talking about why you should use it, what type of methods you should use it with but I ...
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3answers
255 views

How much should I break up my unit tests?

I recently learned about unit tests and TDD and have started going back to add unit tests to my code (and thank god, it's proven that some things I've written are much more broken than I thought). ...
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4answers
348 views

Unit testing when it's harder to come up with concrete cases than write the logic

I have little experience with unit testing, but at the project we're working on right now we decided to do unit testing. The project is a WPF/Entity Framework application, and the part I'm being ...
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3answers
359 views

Unit testing method that calls multiple private methods

I've been reading a lot about unit testing recently and there seems to be a debate online about whether private methods should be tested or not. If I have an interface that exposes one method, but ...
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2answers
91 views

Should I put the name of the method I'm testing in the Unit Test method's name/assert message?

Given that a method's name might change in time, is it a good idea to specify the name of the method whose return value I am asserting as a part of the Unit Test method's name? What about the message ...
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3answers
1k views

In TDD should I have to write Test first or Interface first?

I am learning TDD using c#, as far as I know test should drive the development, that is first write a failing test after write the bare minimum code to pass the test then do refactoring. But it is ...
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1answer
104 views

when would you wrap a service object with an interface? [duplicate]

I'm new to UT and some of the best practices and anti-patterns when writing testable code, made me think. I used to wrap any service object with interface. but I see many mocking frameworks can ...
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57 views

when would you write static method as it avoid a “seam” for testing [duplicate]

when would you write static method. I used to write it in utils classes where all the methods are static and work state-lessly on arguments only. But now I know it blocks from creating a seam in ...
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1answer
105 views

Should I write a unit test to this?

Given the following pseudocode: List dohList = new List(); Foo foo = A.getFoo(); if ( foo != null ) { Bar bar = foo.getBar(); if ( bar != null ) { FooBar fb = bar.getFooBar(); ...
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401 views

Unit Testing: Pass in Modules or Entire Codebase?

In unit testing, the idea is (I think, correct me if I'm wrong) to unit test a module, then integration test these modules together, then integration test the respective "regions" of modules you ...
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1answer
98 views

Do you spend your effort to reuse obsolete unit tests or rewrite them entirely? [closed]

I have this javascript project which has a unit test suite(about 200unit tests) that covers about 11.31% of the code that it was testing. The project has evolved greatly but the unit tests where never ...
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2answers
117 views

Introduction to testing [closed]

I am very new to the concept of testing and I had not yet have any experience with this. At my company, no one does write tests as of now, neither is any test framework set up or anything. Also, we ...
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1answer
91 views

Is there a cleaner way to test extras_require

I have code reviewed a piece of Python code, but to me it looks really ugly, hacky and complex for something that can be achieved very easily. The code looks something similar to the following: ...
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2answers
107 views

Handling repetitive unit testing tasks [duplicate]

This problem arose whilst writing a simple 3D vector class. The class contained methods (Java, so no operator overloading) for addition, subtraction, multiplication, and division. These methods ...
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1answer
270 views

Writing software without unit testing

Usually, when I write software, I use unit tests for each function to test if it is working without any problems. However, recently I have found myself writing some software that are not really ...
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6answers
2k views

Unit test private method in c++ using a friend class

I know that this is a debated practice, but let's suppose that this is the best option for me. I am wondering about what is the actual technique to do this. The approach that I see is this: 1) Make a ...
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0answers
103 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 ...
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1answer
415 views

Does the games industry use automated testing for visual parts of games/rendering? How?

Some parts of a game are easy to test in an automated way (logic, maths, input handling); but there's also a lot that's purely visual and not easily testable. I would be surprised if the games ...
3
votes
4answers
314 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" ...
0
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2answers
160 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 ...
6
votes
3answers
1k 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 > ...
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2answers
345 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 ...
1
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0answers
67 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
2k views

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
135 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
347 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 ...