Unit testing is a method by which individual units of source code are tested to determine if they are fit for use.
11
votes
3answers
589 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 ...
2
votes
1answer
51 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
votes
3answers
55 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 ...
1
vote
1answer
80 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
votes
1answer
51 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 ...
2
votes
2answers
186 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 ...
1
vote
2answers
134 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
votes
2answers
178 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
272 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 ...
4
votes
4answers
198 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
votes
2answers
67 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
votes
2answers
304 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
votes
2answers
289 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
votes
2answers
204 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
votes
1answer
76 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, ...
34
votes
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
votes
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 ...
3
votes
1answer
84 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
votes
1answer
178 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
votes
1answer
203 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 : ...
2
votes
1answer
255 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
votes
2answers
139 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;
}
...
15
votes
2answers
895 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
votes
0answers
97 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. ...
-1
votes
3answers
140 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 ?
0
votes
1answer
101 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
109 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
votes
3answers
137 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 ...
1
vote
2answers
59 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
vote
1answer
47 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
votes
1answer
165 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 ...
1
vote
1answer
91 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
votes
2answers
400 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
votes
1answer
94 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 ...
82
votes
12answers
10k 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 ...
0
votes
2answers
60 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
132 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
votes
4answers
276 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
votes
3answers
110 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
110 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
185 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
...
0
votes
2answers
174 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 ...
15
votes
2answers
899 views
Shipping test code. Why wouldn't you?
I would like to ship unit tests 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
165 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 ...
5
votes
4answers
570 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 ...
1
vote
1answer
70 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 ...
0
votes
0answers
38 views
Mocking delegate constructors
I am new to Unit Testing in C++. I am supposed to write a Unit test for my code and I am using Google Mock for the same. I have gone through their turtle example.
But I am still confused as to how to ...
11
votes
3answers
762 views
Unit Testing Competition
My employers runs a monthly unit testing day competition. One entire day is dedicated to writing unit tests -- obviously we do more testing throughout the month, but this is an entire day -- and the ...
