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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Unit Testing a Function which produces “limit less” results

I am pretty new-ish to unit testing in a more nuanced sense. If have an application function which based on users given input could produce an seeming "limit-less"combination of output, whats the ...
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0answers
203 views

ASP.Net MVC - Implementing a Test Environment

I would like to implement some sort of test environment for ASP.Net projects. I am trying to implement this as an alternative to mocking the entity framework. Here is what I am trying to achieve : ...
13
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3answers
793 views

How to draw programmer's attentions in certain conditions?

Let's start with an example. Let's say, I have a method called export that depends heavily on the DB schema. And by “depends heavily” I mean I know that adding a new column to a certain table often (...
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1answer
172 views

TDD/BDD - Properly defining tests, adjusting tests, putting describe blocks inside it blocks

I am coming around with TDD/BDD. I am a bit confused though, when it comes to initially writing my BDD tests and then adding more tests after the very broad tests. For Example, lets say that I am ...
2
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3answers
232 views

automatic database fill up in sql script tests

The problem I am working on an application with ~ 1000 tables in a sql server database. I am having a recurring issue with a sql script. The script is used by the consulting team to "clean" some ...
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1answer
107 views

Should I share test code between different repositories [closed]

Suppose I have a Repo A that imports a Repo B. I maintain both of them. Currently, I have some convenience functions that are useful for testing of both repos. They live in Repo B's test directory. ...
1
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1answer
220 views

How to test a REST service without being excessive

So I have a REST backend (in node.js or Java doesn't matter but the example is in js). I try to have a service for each endpoint so that the /users endpoint has two files: usersRouter.js which ...
3
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2answers
216 views

Writing your test assertions in your function comments (just before the code)?

I'm using PHP and PHPUnit. Something bothers me: the fact that the assertions are in another class (too easy to forget or to ignore, for any new programmer in the project). If the test assertions ...
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2answers
204 views

When is documentation, unit testing, QA and refactoring meant to be done in a 2 week agile sprint?

The team I am working on is trying to do agile development with 2 week sprints. I think we must be doing something wrong however, as we have to work like madmen to get the features implemented in the ...
5
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2answers
197 views

Is there a benefit to unit testing code whose sole purpose is to generate non-human-readable code in another language?

A significant portion of the application I work on every day consists of Javascript that outputs a lot of (what might as well be) Excel spreadsheet formulas. Yes, Excel is barely a Turing-complete ...
3
votes
2answers
410 views

Should I also mock header files?

So, I am part of a very large project which has, as yet, no unit testing (shudder!) and I want to introduce it. I plan on using Google Test and Google mocks. The code is large and unwieldy and ...
5
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4answers
277 views

In CI, should tests be run against src or dist?

I've had a dispute with a colleague about when to run JavaScript unit tests in a CI environment at one of two different times. Let's call the two parties PE (pro-early) and PL (pro-late). Early (...
0
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2answers
72 views

Best practices for testing deep objects?

I'm writing in javascript with 'should' library, but this doesn't matter. I should write test for method, which returns a quite big object with a lot of fields. How I should write my expected result? ...
4
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2answers
381 views

What to do with my unit tests when refactoring code to a new class

I hope I can make a clear question... I've simplified my code example for this question, I hope it still makes sense. public class PersonComponent { public bool IsQualified(Person person) { ...
3
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2answers
664 views

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 ...
3
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2answers
597 views

Unit Testing without DI

I am starting a small ASP.NET MVC project, each task on the board must come with unit tests. The project is small, just a few pages with not that much processing, so I decided not to implement DI. My ...
2
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1answer
125 views

Eclipse unit test - one project per file/class?

My new company has never had unit testing, but have finally been persuaded to introduce it. They have chosen Google test and, for some reason, want to run the unit tests from within Eclipse (where I, ...
35
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7answers
4k views

Is there a need to keep tests for simple (self-contained) functions?

Consider this: public function polynominal($a, $b, $c, $d) { return $a * pow($x, 3) + $b * pow($x, 2) + $c * $x + $d; } Suppose you write various tests for the above function and prove to ...
13
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4answers
1k views

Do mocks violate the Open/Closed principle?

Some time ago I read, on a Stack Overflow answer that I can't find, a sentence that explained that you should test public APIs, and the author said that you should test interfaces. The author also ...
4
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1answer
109 views

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 ...
4
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1answer
227 views

Why do Unit Testing Attributes usually require public Methods?

I recently noted that adding [TestInitialize] to a protected method in a .NET assembly wasn't respected, but if I made the method public it was called by the unit test runner (Resharper in this case). ...
5
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1answer
400 views

How should I test the HTML output my class creates?

As a learning project, I am trying to create something similar to the WebGrid that comes with ASP.NET MVC. Now this component MyGrid<T> looks like this: public class MyGrid<T> where T : ...
4
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1answer
480 views

Testing private methods as protected

I was reading this answer about testing private methods and it mentioned several possibilities: extract methods as public to another class make them public separate the env of test and production ...
4
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2answers
271 views

Are Integration Tests Meant to be Redundant?

Here is some fake code under test: public void saveItem() { try { databaseInterface.saveItemToDatabase(item); } catch (Exception e) { // deal with it return; } itemList.Add(...
15
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2answers
960 views

Is it ok to avoid testing base classes?

I have a base class with a fair amount of "meta programming" to give it the flexibility/abstraction it needs to be rather generic. I do have a lot of subclasses using the common methods in the base ...
2
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0answers
225 views

How do I test with multiple input combinations?

I have a piece of code that I need to test, which is layered in three parts: Web API Controller Persistence/Logic Layer System calls for persistence It's the basic GET/POST/PUT/DELETE call system. ...
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3answers
173 views

Who should write Unit Tests? [duplicate]

Should unit tests be written by the developer who wrote the code or someone else ? And how effective is writing units tests as a method of learning a new system ?
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1answer
149 views

Bad idea to use the same test cases for multiple parts of a contiguous algorithm?

I'm working on an algorithm that's split up into multiple parts, each of which performs different tasks but is more or less separate from the others, by which I mean the only interaction between the ...
2
votes
2answers
225 views

Should unit tests run on every git branch?

I am new to repo management / continuous integration. I designed a repo in the following way PROJ |-src |-include |-lib |-config PROJ_Unit_Tests |-src |-config PROJ_Doc When I now do ...
2
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3answers
264 views

Unit testing text output

I have recently become responsible for a legacy tool that analyses code and provides a log as output. As part of the JUnit suite for this, there are ~100 tests that rely on successfully matching the ...
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2answers
164 views

Is the use of a constant as a parameter of an Unit Test mocked dependency's method wrong?

We have a Unit Test Case where we want to assert that after a login operation, the SUT is able to call a method on one of it's dependencies. This dependency is a NavigationManager and the expectation ...
1
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1answer
62 views

Website form testing [closed]

My boss has three websites and each of those websites have forms on them that people can sign up for nightclubs. He asked me to look up usability tests, however, I don't think that's what hes ...
0
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1answer
575 views

Will TDD really save bug fixing time for WPF/MVVM

I'm looking for an update .net 4.5 WPF+MVVM+TDD tutorial for my team. I have found only one good tutorial https://deltaengine.fogbugz.com/?W199 My goal is to learn Test Driven Development using WPF ...
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1answer
139 views

Focus of unit tests on code [duplicate]

I discover mocking strategies after 50% of tests was writen, and I'm confused about how much focus unit tests should have, for example on class method. I know that for external dependencies you should ...
2
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2answers
2k views

BDD, Cucumber best practices

I'm trying to understand some best practices when it comes to BDD and Cucumber. I've only recently started to use it, and the first feature I have written a test for is testing a search feature, more ...
0
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1answer
207 views

Unit testing implementation vs behaviour

Is it possible to write a unit test (as opposed to an integration test) in the following scenario: I have a list of Foo objects, some of which already exist in the database, some don't I want to ...
87
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12answers
11k views

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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2answers
73 views

Avoid FileUtil that is made for tests [closed]

I'm constantly creating util classes like Files to be able to mock files functionality in tests. It is convenient but violates basic idea - don't modify production code to comply with tests. I could ...
8
votes
2answers
1k views

Unit Testing with massive lookup tables?

Our system is structured in such a way that we get a lot of key info for our calculations and other such logic from lookup type tables. Examples would be all kinds of different rates (like interest ...
0
votes
4answers
176 views

Unit Testing for mapping int to string

How should one unit test a function which (among other things) maps an integer to a string? If the function were to map 0 => string0, 1 => string1, 2 => string2, should I test for each of 0, ...
7
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4answers
447 views

Testing a Conversion class

I have a class that is responsible for performing conversions from/to twenty-something types. Let's call this class ConvertUtils. For C# programmers out there - this class expands .Net's Convert ...
7
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3answers
259 views

How to write tests that make sense for visualization software?

I have a fairly large piece of software which takes certain file types and visualizes them / creates a host of buttons for manipulation of the image plotted. I feel like I'm finding bugs / pieces of ...
2
votes
1answer
302 views

Javascript unit testing - mocks or fixtures?

Interested in some opnion... I'm introducing unit testing of JS into a team, it'll largely be testing modules with many dom interactions and updates. Traditionally I've always used mocks and spys ...
1
vote
3answers
903 views

Unit testing functions calling other tested functions [duplicate]

I have three functions: ValidateUsername(), which determines if a string is a valid username according to some rules SetUsername() which sets a string as a user's Username if it passes validation ...
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2answers
335 views

Testable design in Swift

I've been searching for so long about how to design testable classes in Swift but every information site just describe basic stuff like how to test, how to assert, why is testing good... My current ...
16
votes
3answers
1k views

Shipping test code. Why wouldn't you?

I would like to ship test code alongside a product. Specifically, provide an option so that anyone with a copy of our program can hit a "self-test" button or pass --self-test on the command line and ...
5
votes
2answers
279 views

How to setup build system for unit testing + mocking?

We have a legacy code base in entirely C++. Our build system is CMake. My first stab at unit testing was as follows: Define a target (LibraryA). This library contains the code to test. Define a unit ...
34
votes
6answers
4k views

How can I write unit tests that simplify feature implementation? [duplicate]

I'm a newbie to working in software development and I read a lot about how cool unit tests are. Now, I've made my first steps into a project where I'm working with a number of equally unexperienced ...
6
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4answers
999 views

How to write a test to cover a bugfix of a segfault

There was a bug that I recently fixed that was causing a segmentation fault (due to an out-of-bounds access). The maintainer of the project is asking me to write a unit test to cover the bugfix. How ...
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1answer
118 views

What is a good alternative to the TestDataBuilder pattern?

The TestDataBuilder pattern is used in unit testing to create collaborators. Its advantages versus using constructors: Changes to constructors are localized. Test code becomes clearer, because you ...