TDD stands for Test-Driven Development, or Test-Driven Design. It is the practice of writing a unit test before writing code to satisfy it, in what is known as the Red-Green-Refactor cycle.

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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 ...
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TDD in JavaScript [closed]

I'm about to participate in a Coding Kata and I would like to do it in JavaScript. What tools and libraries do I need for TDD in JavaScript?
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How does TDD address interaction between objects?

TDD proponents claim that it results in better design and decoupled objects. I can understand that writing tests first enforces the use of things like dependency injection, resulting in loosely ...
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How much extra time is needed to add unit test in a development task?

My team is considering moving to test-driven development. Currently we have almost no unit testing, we have been only relying on the user acceptance test, and developer's own manual test. Not everyone ...
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Newbie worried about CASE tool

I'm looking for some guidance on CASE tools and whether my concerns are valid. Recently I was in a meeting between my employer and an external software company which have a CASE tool currently in ...
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Sprint Planning Meetings - determine if a work item is “planned”?

We've been working with Scrum for a while now, generally successfully. However of late, as the pressure has started to mount up we've encountered several situations where items came through planning ...
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Should we mock entities and value objects when doing DDD?

After reading a few articles about Newable vs Injectable objects and how these concepts relate to DDD's services, entities and value objects, I was left with some doubts about using newables in my ...
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How to Structure Simple C++ projects for TDD

I am introducing Google Test into our development environment at work, and would like to encourage a TDD mindset, making this as accessible as possible for new developers to start using. I am looking ...
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How to decide what forms the System Under Test

Ok, so we started with the initial version of "The Art Of Unit Testing" and we do unit tests for classes where every test covers one aspect of one method. This has the drawback of high maintenance ...
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When to write tests for a new class using BDD?

I've been practicing behaviour driven development (BDD). I understand that you have to write tests that test the behaviour of the code, and this will allow the design of your code to evolve and take ...
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Is the difference between BDD and TDD nothing more than a vocabulary shift? [duplicate]

I recently made a start on learning BDD (Behaviour Driven Development) after watching a Google tech talk presented by David Astels. He made a very interesting case for using BDD and some of the ...
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Refactoring numerical code for TDD and encapsulation

I am coming to terms with TDD, and the fact that I need to re-factor some code that I'm (re)writing. I am having a problem that I think is a classic conflict---TDD vs. encapsulation of private ...
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Is it okay to mock multiple objects in one class?

For developers with extensive experience using mocks, is it okay to mock multiple objects in one class (ie satisfy multiple interfaces) or is this not recommended? I am wondering because mocks are ...
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Whose responsibility is it to create the interface and/or acceptance testing? Developer or QA?

I am a backend developer and always create tests for my applications. Recently I study and apply the interface tests (using selenium), but I doubted whether I who should create these tests, developer ...
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Inheritance in test classes

I have an interface Serializer with methods serialize and isSerializerFor. I created a first implementation of this using TDD, and ended up with a nice clean test case fully covering a nice clean ...
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374 views

Product Owner and automated tests

One of the claims of BDD-style development is that it bridges the gap between Product Owner and developers: the Product Owner writes a story, which can be converted in an equivalent automated test ...
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How do you evaluate automated testing for a particular product/project?

Automated testing is pretty hyped-up in recent years, with particular emphasis on TDD at the "unit" level. The touted advantages include things like: Stabilizing existing code: breaking changes are ...
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Keep or discard tests that use methods now private [duplicate]

When writing object-oriented code from scratch, I try to follow these steps: Write a test that fails. Write a function that makes the test pass. When enough tests and functions are complete, ...
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How to deal with the notion of time in UI/Integration tests

There are some well-known techniques for dealing with the notion of time in unit tests. These allow you to write unittests that always work with a specific time so the outcome of the test is ...
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How to keep settings for C++ Unit Test modules in sync with the production code modules?

Note: I'm coming from a Windows / Visual-C++ background. Note: I have already read Michael Feathers' Working Effectively with Legacy Code. Note: Broad question, asking for narrow answers, i.e. while ...
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How do you unit test \ use TDD methods for ETL's and reporting projects?

ETL projects are projects created using an ETL (Extract - Transform - Load) tool such as SSIS, PowerCenter,etc These typically involve reading data from an external source, loading it to a staging ...
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If TDD is design, how do you know your TDD is well designed? [duplicate]

Given a large group (50+) of programmers: All given the same problem, All using Test-Driven Development (TDD), All pair programming, All doing group-based code review, I have personally seen the ...
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800 views

Should you exercise TDD on prototype applications?

I'm developing an iOS app, which is a prototype for a customer. They're expecting it to not be of production standard and are happy for a few rough edges here and there. Since this is my first ...
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How to time the sprints in Scrum to allocate time for TDD?

We have sprints of 4 weeks duration. What I have been doing is 3 weeks dev time and 1 week of pure manual/automated testing, stabilization and shipment assurance testing. How to manage TDD within ...
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How do I make code bound to an ORM testable?

In Test Driven Development, how do I make code bound to an ORM testable? I am using a Micro-ORM (PetaPoco) and I have several methods that interact with the database like: AddCustomer UpdateRecord ...
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TDD: how to test file outputs?

I'm really new to TDD, so I guess this question is pretty basic. We're building a website, and part of the functionality is generating some files (binary files: Excel, PDF, whatever). How should I ...
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“TDD is about design, not verification”; concretely, what does that mean?

I've been wondering about this. What do we exactly mean by design and verification. Should I just apply TDD to make sure my code is SOLID and not check if it's external behaviour is correct? Should ...
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Which class to start TDD of card game application? What's the next 5-7 tests?

I have started to write card game applications. Some model classes: CardSuit, CardValue, Card Deck, IDeckCreator, RegularDeckCreator, DoubleDeckCreator Board Hand and some game classes: Turn, ...
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Steps towards TDD [duplicate]

I need some advice to take the steps for TDD. How do we think in terms of interfaces for everything when we are writing code? Most of the testing books tell you how to write tests. But I want a book ...
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C# Unit Testing In A Single Project

Alright, so I'm doing my first "real" C# project. I'm chugging along, enjoying myself, nice little language I've got here, fairly easy to use, la ti da. Then I get to the point that I realize ...
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DRY code, DRY tests?

At some point I had to create some class "Class1" and that class needs a method "method". So I have the following: Class1MethodTest: A total of N tests that check the behavior of Class1.method Class1 ...
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Requesting quality analysis test cases up front of implementation/change

Recently I have been assigned to work on a major requirement that falls between a change request and an improvement. The previous implementation was done (badly) by a senior developer that left the ...
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Development setup for TDD. Is it correct?

This is how my team has it's development environment set up: Each team member has a local development environment on their own computer, where they check out the code from a shared repository. Every ...
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Which GOF design patterns work well with TDD, and which do not?

The GOF Design Patterns book rarely mentions the test-ability of each pattern. I'm aware that there are patterns such as Singleton that would lead to code for which it is difficult to write unit ...
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What is a good workflow for a C++ beginner?

I desire to become a more serious scientific C++ programmer. To do so, I need a consistent style of workflow (e.g., coding, test-driven development, etc.). My question is simply what sort of ...
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How to know what to test in TDD? [duplicate]

I've heard about TDD more than one year ago, but until now I didn't manage to get myself started with it. Indeed, one of my greatest doubts is always what to test. The examples given always shows test ...
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Test code that will be changed soon

My question is whether I should test code that I know will be changed in a short time. I'm doing TDD in ruby, and I often meet with this question. I'm interested about best practices about this, pro ...
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Differences between Given When Then (GWT) and Arrange Act Assert (AAA)?

In TDD there is Arrange Act Assert (AAA) syntax: [Test] public void Test_ReturnItemForRefund_ReturnsStockOfBlackSweatersAsTwo_WhenOneInStockAndOneIsReturned() { //Arrange ShopStock shopStock ...
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Using 2 Constructors: one that injects dependencies and one that instantiates them

I started using TDD for the first time on a project I started recently. I have a few objects with dependencies and structures that look something like this: public class MyClass { private ...
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Do I need a suite of unit tests for inner business-logic class? Since it's going to replicate the acceptance test suite for 90% [duplicate]

I'm new to TDD and wondering about methodolody. Given: A simple project which implements functionality of, for example, a console calculator. It has the following structure: Fairly simple ...
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TDD workflow for (implementation specific) edge cases

When developing features with TDD, I create a test for each combination of feature and case. So, one test for creating user successfully, one for validation errors, and one for database errors. I ...
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Do I need to learn python first to understand the part 2 of the book Test Driven development?

It seems like Python is used as a coding language for part 2 of Kent Beck's book Test Driven Development. I have read the first part of that book and started appreciating the value of TDD . First part ...
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TDD adding simple properties

I am currently doing my first real project with TDD. I have written tests, and implemented most of the logic for the application. However, there are properties I know I need to have on the UI, ...
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How to move Python doctest examples into another unit test framework?

Years ago AFAIK the mathematitician and software developer Tim Peters discovered that very often the documentation of APIs tends to get out of date over time during the software live cycle, because ...
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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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Does not testing internals entail diligent refactoring and/or rely on developer talent?

I'm not asking here what the arguments are for/against testing internal methods (though I'll restate some, and don't mind hearing others). My questions relate to the implications of only testing ...
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Should the test and the fix be written by different people?

There is a common practice in TDD to write a test before fix to avoid regression and simplify fixing. I just wonder what if the test and fix will be written by different people, total spent time will ...
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Should EICAR be updated to test the revision of Antivirus system?

I'm posting this here since programmers write viruses, and AV software. They also have the best knowledge of heuristics and how AV systems work (cloaking etc). The EICAR test file was used to ...
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GUI functional acceptance tests, making them less brittle / obstacle to further development

(Background - skip to bold statement for the crux) I'm working through the book "Growing Object-Oriented Software, Guided by Tests" by Freeman & Pryce, while applying it to a project I'm ...
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How to deal with changes that need further testing while working on another test?

TDD means to test before you start writing production code. So I start writing a test for MyClass called MyClassTest. It fails and I start to implement the wanted functionality in MyClass. During the ...