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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Python Unit Test for Function [on hold]

I would like to execute a simple unit test on my functions in a script which send a json web service to an esri file geodatabase. I've left out much of the script aside from my functions and my unit ...
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Global / Application settings and testing

We have a global dictionary of application settings (read from a DB on start-up and refreshed when required) and a static class with a bunch of methods to get these settings. This is historic, but I ...
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2answers
260 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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3answers
129 views

Unit Testing and dependencies

I'm just learning how to do proper unit testing, and a lot of resources make reference to using explicit dependencies, ie dependencies that are passed into the constructor, to allow for easy ...
2
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0answers
115 views

Testing a method that reads from standard input and outputs to standard output [migrated]

I have a method which reads lines from standard input and outputs them to standard output. In a JUnit test, how can I have it send standard input to the method and how can it make assertions about the ...
6
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3answers
222 views

Implementing common logic in base class

Background In the documentation of a project I'm working on I came across the following sentence which immediately triggered an alarm for me: when having several concrete classes that inherits ...
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1answer
47 views

Test logic with external data [duplicate]

I have a site programmed in PHP where I make more call to external server that return me big xml of data. For each record of the xml I have to make other external call to get other data. So my ...
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4answers
182 views

Filling the gap between Conception and Unit Test

I am stuck trying to do TDD. I'd rather seek the counsel of others who have gone before rather than waste time with trial and error. QUESTION: What diagrams / exercises / development processes can ...
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2answers
472 views

Is there a better way to organize my module tests that avoids an explosion of new source files?

I've got a neat (so I thought) way of having each of my modules produce a unit-test executable if compiled with the -DTESTMODULE flag. This flag guards a main() function that can access all static ...
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24 views

How to handle karma/bower in a Symfony Bundle on github?

i am working on a Symfony Bundle that uses angular among other javascript deps. Now i want to unit-test my javascript code and i want to ship those tests as well. My initial idea was to add ...
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1answer
80 views

MockRepository vs Test Database for Unit Testing

Before starting, this question is not the same as this one. Comming from a PHP background, my experience is in CakePHP, which is a framework that supports Unit Testing by setting up a local test ...
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3answers
414 views

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 ...
2
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2answers
63 views

Value of unit testing property setters to check events [duplicate]

When coding in WPF with the MVVM pattern, it's common to see a lot of property get/set statements that raise an event, which can then be picked up by the UI layer. public string Address { ...
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1answer
60 views

Testing front-end app that hits a REST service

A lot of questions about testing here... And I have another one. Forgive me, but I want to make sure I do this right. Let's say I have a front-end application, be it a mobile app, or a single-page ...
0
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2answers
113 views

how does test-driven development prevent us from type errors?

I heard (from Robert C. Martin) an assertion that since dynamic languages don't have static typechecking, people should write unit tests to prevent us from type errors. I'm not sure if I'm following ...
0
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2answers
78 views

How to ensure a new Unit Test is for the correct Test Case? [duplicate]

When writing a unit test for a scenario believed to be already covered, ie, the first run of the test would be green, what is a good guideline to ensure that it is in fact testing the proper test ...
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4answers
242 views

How to make one test depend on the results of another test?

Let's say there is a utility class that provides some common static methods used everywhere in your code by many other classes. How would you design your unit tests for the consumers of the utility ...
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5answers
86 views

Skillset for unit-testing [closed]

I have two questions regarding this topic: How long does it take for you to create unit-tests? Take a project for a web-application, and you are working TDD. How long time does it take for you to ...
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4answers
1k views

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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10answers
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Is static universally “evil” for unit testing and if so why does resharper recommend it?

I have found that there are only 3 ways to unit test (mock/stub) dependencies that are static in C#.NET: Moles TypeMock JustMock Given that two of these are not free and one has not hit release ...
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3answers
183 views

How to use unit tests when using BDD?

I am trying to understand BDD. I've read some articles and as I understood BDD is "the next step" from TDD. I say that because I find both to be very similar, and as I could read in this article, BDD ...
5
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4answers
179 views

How to unit test correct implementation of an interface is used?

I have this problem with unit testing for years. Unit testing should test isolated units, that is, if we use interface/implementation vocabulary, it should test concrete implementation classes. Fine, ...
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1answer
163 views

Why the practice of writing unit tests in a different language isn't that popular?

When Microsoft released Visual Studio 2008, there was a thing they were talking a lot about at the conferences and in their online tutorials: the idea of writing the actual code in one language, and ...
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1answer
69 views

how to unittest with thorough test coverage [duplicate]

I am trying to get into unit testing with python (though my question is not specific to python). I want to add a test for function I already have - I know I should do it the other way round, but here ...
10
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4answers
685 views

Gradual approaches to dependency injection

I'm working on making my classes unit-testable, using dependency injection. But some of these classes have a lot of clients, and I'm not ready to refactor all of them to start passing in the ...
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3answers
100 views

Should all possible counter-cases be tested? [duplicate]

I'm currently trying to unit test a behavior which, in some very particular cases, returns B instead of A. It may depend on the value of 3 different attributes for example. How should I test this? ...
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282 views

How should I unit test mathematical formulae?

I have a number of functions that are pretty close to the mathematical definition of a function. For example, a simplified version of one of these functions may look like: int function foo(int a, int ...
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2answers
217 views

Is checking that a property doesn't throw an exception a valid unit test?

I'm writing tests for the following class: public class Foo : INotifyPropertyChanged { private int _failCount; private int _totalCount; public double FailRate { get { double ...
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2answers
203 views

How to add rigor to my testing?

I work on a small/medium sized Java application. Over time, I've tried to ensure that the tests which I write are "good" tests, and that there's plenty of them. Hence I've been looking into various, ...
0
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1answer
96 views

Testing process on life critical systems [duplicate]

I currently work in web development - unit testing, functional testing are all good and really are part of what is considered being a professional developer. However, I also have a fear of flying and ...
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56 views

Unit testing Eloquent outside of Laravel

How can I unit test my Eloquent models when I'm using the ORM outside of Laravel? What I'm hoping to do it run tests on each model but somehow mock the database connection/query/builder(?) object. ...
5
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1answer
283 views

Should the expected value be hard-coded into the Assert

My own personal preference would be to use a variable, but maybe there are reasons against this? I haven't been able to find any resources that state the pros or cons of using one of these over the ...
5
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6answers
2k views

Parameterized tests - When and why do you use them?

Recently at work we've been having some differences of opinion with regard to Parameterized testing. Normally we use a TDD-style (or at least try to) so I understand the benefits of that approac. ...
2
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2answers
173 views

When testing is it OK to use a method of the subject to test another method of the subject? [duplicate]

I have two methods in the same helper class one that creates an image (method A) and one that compares two images (method B). I want to check the return of method A against an existing image. To do ...
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6answers
184 views

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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1answer
123 views

How do you write tests for methods that interact with data in system files?

I'm trying to be proactive about writing an iOS app in a test-driven manner. However, I'm stumped as to how to test a method that is to interact with real system files. For those familiar with iOS, ...
4
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6answers
129 views

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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3answers
456 views

Is it actually worth unit-testing an API client?

This is something that's been troubling me for a while now. Is it actually worth unit-testing an API client? Let's say you're creating a small class to abstract-away the calls to a petshop REST API. ...
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2answers
53 views

How to add cases to large legacy code base project? [duplicate]

There is a legacy project full of C++ code. As a MFC GUI project, it contains lots of businesses logic out of control and beyond average level programmer to understand. To work on such GUI project, is ...
122
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11answers
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Is it OK to have multiple asserts in a single unit test?

In the comment to this great post Roy Osherove pointed to the OAPT project that is designed to run each assert in a single test. This is written on projects home page: Proper unit tests should ...
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5answers
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Do I need unit test if I already have integration test?

If I already have integration test for my program, and they all passed, then I have a good feel that it will work. Then what are the reasons to write/add unit tests? Since I already have to write ...
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1answer
63 views

Beginner's UnitTests for MVP Presenter class

In my application, I have a user settings form with roughly 20 checkboxes and a few other controls. The checked state, enabled state and texts of these controls are bound to about 60 properties of the ...
2
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4answers
2k views

Can I test effectively javascript functions with a PHP unit-testing framework?

If I want to unit-test some of my javascript functions, would it be more efficient (and doable) to use the already installed PHP unit-testing framework, or should I use a javascript unit-testing ...
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3answers
144 views

What does stubbing mean in programming?

I often hear the term stub, stub out somethings, stubs, ...etc. What does stubbing mean in programming, where the word come from? and in what contexts it can be used?(just examples)
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343 views

Small code, big test

I have this code in a controller of an MVC implementation: public void execute() { try { String path = userSelectsFile(); if ( path == null ) return; //Just returns ...
5
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4answers
576 views

How to test a method which is not as much as a unit, because it is more of a 'orchestrator' / 'process' / 'controller' / 'coordination' class [duplicate]

I want to test a method which is not as much as a unit, because it is more of a 'orchestrator' / 'process' / 'controller' / 'coordination' class. This is the case: I have four unit tested classes: ...
10
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5answers
1k views

What's the best way to organize our unit tests

We've built up a substantial number of unit tests for our main program over the years. Several thousand. The problem is that we don't have a clear idea of what tests we have because there are so many. ...
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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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6answers
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Am I Unit Testing or Integration Testing my Stored Procedures?

I have had many occasions recently where I have needed to maintain complex stored procedures and functions. These were broken already, usually in fairly subtle ways - there were very few occasions ...
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2answers
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How have Guava unit tests been generated automatically?

Guava has unit test cases automatically generated: Guava has staggering numbers of unit tests: as of July 2012, the guava-tests package includes over 286,000 individual test cases. Most of ...