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 a codebase with sequential cohesion

I've this really simple program written in C with ncurses that's basically a front-end to sqlite3. I would like to implement TDD to continue the development and have found a nice C unit framework for ...
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TDD vs. Productivity

In my current project (a game, in C++), I decided that I would use Test Driven Development 100% during development. In terms of code quality, this has been great. My code has never been so well ...
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I don't understand how TDD helps me get a good design if I need a design to start testing it

I'm trying to wrap my head around TDD, specifically the development part. I've looked at some books, but the ones I found mainly tackle the testing part - the History of NUnit, why testing is good, ...
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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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Test Doubles : Do they go in “source packages” or “test packages”?

I've got a couple of data access objects (DefaultPersonServices.class, DefaultAddressServices.class) which is responsible for various CRUD operations in a database. A few different classes use these ...
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Why is it often said that the test cases need to be made before we start coding? [duplicate]

Why is it often said that the test cases need to be made before we start coding? What are its pros and what the cons if we don't listen to this advice? Moreover, does that advice refer to black box ...
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Difficulties With TDD & Refactoring (Or - Why Is This More Painful Than It Should Be?)

I wanted to teach myself to use the TDD approach and I had a project I had been wanting to work on for a while. It wasn't a large project so I thought it would be a good candidate for TDD. However, I ...
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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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Does TDD lead to the good design? [duplicate]

I'm in transition from "writing unit tests" state to TDD. I saw as Johannes Brodwall creates quite acceptable design from avoiding any of architecture phase before. I'll ask him soon if it was real ...
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Can you be Agile without doing TDD (test driven development)?

Is is possible to correctly call yourself (or your team) "Agile" if you don't do TDD (Test-Driven Development)?
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The Relative Cost Efficiency of (Acceptance) Test Driven Development

I would like to know what the overall impact of resource planning on a software project is, where the requirements and design of the project are driven by automated acceptance tests and unit tests, in ...
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Learning Test Driven Development [closed]

If I want to learn TDD on my own, where would I start apart from the usual Google Search? Are there any books that you would recommend or any method that you followed to learn it on your own? I am ...
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When should I write integration tests?

According to rules of TDD unit tests are written before production code, but what about Integration tests that exercises interaction between concrete (non mocks) wired objects? Should they be written ...
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Do unit tests sometimes break encapsulation? [duplicate]

I very often hear the following: "If you want to test private methods, you'd better put that in another class and expose it." While sometimes that's the case and we have a hiding concept inside our ...
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1answer
167 views

Can you apply agile/TDD in all circumstances?

I'm not against agile/TDD and use it under most circumstances. However, in some circumstances I feel it doesn't work well. For example, the other day I was building a fairly complex data processing ...
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6answers
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Looking for Case Studies of How TDD Improved Quality and/or Speed of Development [closed]

At my company I am trying to make a case for why we should be doing TDD. Currently most developers just do whatever they can to get the project done, then go add unit tests after the fact in order to ...
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1answer
555 views

Designing new application from scratch, TDD, MVC, OOD based [duplicate]

I'm about to improve my skills in all that is related to designing applications from scratch using proper OOD principles, involving MVC pattern and using TDD approach to do it. I have a project for ...
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Who should be responsible to write test cases? [duplicate]

Should tests in some project be written by the actual person that does the coding (usually senior in our team) or it can be done by junior coders with less experience?
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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 practice ATDD if design is not yet emerged from TDD?

Despite being very stakeholders friendly, ATDD aimed to provide a "stop" line when a feature has just been done. This avoids wasting time to add non-focused (and sometimes useless) code. That's why ...
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1answer
255 views

TDD / one test representing the whole scenario ? or should I split it? [duplicate]

While practicing TDD, I came across this specification: A user should be created with its password hashed, be persisted and an activation token should be returned. Should my first unit test, (aiming ...
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706 views

TDD Mock call verification - is it an anti-pattern?

I've been doing TDD for year now, I feel pretty good about it, I love my test suites and all. However I've noticed that lately I've been doing a lot of mock call verification. For example I'd have a ...
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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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Writing unit test only for applications that requires them [closed]

Bit of a rant, but bear with me. People call me purist. I do not code in any way other than TDD. When I try to push TDD as a company policy, the following conversation: company owner: "we'll do TDD ...
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Tools that can catch “fake coverage”?

Hypothetical scenario: codebase is exercised by unit tests run by a TeamCity build-bot, that also uses the built-in dotCover tool to provide coverage metrics. The build will fail if less than X% of ...
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Why is TDD not working here?

I want to write a class A that has a method calculate(<params>). That method should calculate a value using database data. So I wrote a class Test_A for unit testing (TDD). The database access ...
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Is unit testing or test-driven development worthwhile?

My team at work is moving to Scrum and other teams are starting to do test-driven development using unit tests and user acceptance tests. I like the UATs, but I'm not sold on unit testing for ...
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Shared context: good or bad?

RSpec allows users to share context across tests / examples, which would reduce the number of code lines in my app by a significant amount. On the other hand, somehow related to the question of ...
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TDD and Version Control

I am currently learning about TDD and trying to put it into practice in my personal projects. I have also used version control extensively on many of these projects. I am interested in the interplay ...
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Moving legacy application to a testable framework?

We have a web application which contains a web service with over 50 methods. The application is currently installed at a number of sites and is currently being maintained by one developer. The ...
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473 views

What's the next logical TDD move in this learning example?

I'm inching my way up the TDD ladder and I've got to a point where I'd like to get advice on the "next move". I realize there might not be a single answer here, so any logical suggestion would be ...
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3answers
470 views

Introduce unit testing when codebase is already available [duplicate]

Possible Duplicate: Best practices for retrofitting legacy code with automated tests I've been working on a project in Flex for three years now without unit testing. The simple reason for ...
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End-to-end tests versus unit tests, should tests be decoupled?

At our company we typically make sure that we write an end-to-end test for our websites/web apps. That means we access a URL, fill in a form, submit the form to another URL and check the results of ...
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Production or Custom Test Data for Unit Testing?

I've recently had a little disagreement with fellow developers. We're transforming various ontologies from the original source format (Pica+, RDF, etc) into our data format and have several converters ...
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Fundamental TDD: stuck with writing a test so I can write code that I want

I have a Season class. This Season has a few properties: among them, a list of Games. This should be populated from the same source that populated the rest of the Season properties. I have a test ...
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A weakness of the TDD method?

This is in summary the TDD method: Write a test check if thes test fails write production code run test I think that TDD as presented works only in ideal circumstances. I'll take a simple ...
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Is Test Driven Development in Javascript helpful for front-end developers?

I really need your advice. I'm reading a few articles about TDD in JavaScript but I'm really struggling to understand how to use it in my daily work. For instance I'm currently working on a page that ...
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Stubbing and mocking boundaries

Suppose I'm building a JSON API and would like to include an endpoint that returns a list of recently created posts. Somewhere in my system is an existing Post model with the following test: create ...
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How do you test database abstraction in PHP?

I apologise in advance if this question is too subjective but I'm struggling to find a good answer, probably as there is not really a correct answer to give. I'm currently writing a database ...
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8answers
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Why isn't TDD part of programming lessons at school [closed]

My daughter and my son are learning Java with BlueJ. I really don't understand why the first thing they learn isn't to write code to bring a testcase to green light.
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Automated Testing: Explaining its Business Value

To start I don't think this is a repeat of other questions on unit testing. What I'm looking for help with is articulating its value to a team of programmers, analysts, managers and testers. By ...
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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 should you TDD a Yahtzee game?

Let's say you're writing a Yahtzee game TDD style. You want to test the part of the code that determines whether or not a set of five die rolls is a full house. As far as I know, when doing TDD, you ...
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325 views

Why do we write our specs in different files from our source?

The D Programming Language supports writing unit tests inline with source. There's a Ruby gem called test_inline that lets you write specs in the same file as your code. Why is it generally ...
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What to do when your colleagues don't value code maintainability [duplicate]

I've been working in the same software development department for a few years now. In that time, the average stay of a developer has been 6-9 months. A handful have been around for over 2 years, but ...
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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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4answers
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Resources for Test Driven Development in Web Applications? [closed]

I would like to try and implement some TDD in our web applications to reduce regressions and improve release quality, but I'm not convinced at how well automated testing can perform with something as ...
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Good example of complex code using TDD [closed]

What would be a good example of the use of TDD in large, real-life, complex, projects? All the examples I've seen so far are toy projects for the purpose of a book or a paper... Can you name an ...
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Understanding unit tests/TDD for ASP.NET webforms [closed]

I'm the lead programmer at a small software firm (currently 4 developers including myself), we develop bespoke ASP.NET WebForms applications for businesses. I joined there in 2010 just after ...