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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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I’m working on a three layers architecture backend (Laravel). Here’s the context: I have a PasswordService responsible for updating a user’s password. and a Otpservice responsible for verifying/...
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I am designing an analytics application using domain driven design and test driven development. I am having difficulty modeling the following requirement: The application shows a workitem's state. ...
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Say I have a method that expects data to be in some form to perform accurately. In the actual service/application flow, that data is formed upstream in other methods or services. How can I ensure the ...
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This question is a more specific version of the one I posted last week. Let's say I have a complex data structure that is posted into a bunch of different services. The interface of all services looks ...
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Lets say I have an API with two functions: CreateNewMachine(CreateMachineCommand createMachine); EditExistingMachine(EditMachineCommand editMachine); The internal logic of both functions should be ...
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I am currently reading the (not yet completed) ebook "Test Driven Developlment - Extensive Tutorial" by Grzegorz Gałęzowski. There is a chapter featuring Mark Seeman's idea of constrained ...
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What are the use cases of TestOf? I'm new to NUnit testing and from what I have seen, most people don't use this attribute that much. From my experience, TestOf helped me to quickly identify what ...
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I was exploring TDD, specifically the Outside-In TDD pattern, where we need to write the acceptance (integration) test and then jump on to granular unit tests to implement the feature and make the ...
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Let's say that I've been iterating over my feature A with TDD. After several red-green-refactor cycles, I ended up with a nicely polished implementation with a part of the SUT encapsulated into some ...
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I admire Bob Martin's Clean Code. Lately, however, I realized an apparent contradiction. One of the three rules of TDD, which Bob Martin advocates for in his book, is to never write more code that is ...
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I'm doing some TDD practice for my own learning. I'm trying to figure out how to transparently set up private properties of an object to support testing. I have a binary tree node: internal class Node ...
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Suppose I had some Manager class that I need to change in regards to existing functionality by removing code. The Manager always sends an initial message after a connection was established to do an ...
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We all know the standard TDD cycle: I first write a unit test, the smallest unit test that fails; then I write some production code, again the smallest amount of production code that is sufficient to ...
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We have a piece of code that decorates an interface to transparently add retry logic. Inversion of Control configuration service.AddOurRestApiClient() .AddResilienceHandler("Retry", ...
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I'm trying to practice BDD by applying it to a simple problem—in this case, the flocking algorithm, better known as "boids". Before any of the rules (cohesion, alignment, etc.) comes the ...
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I've been working at this company for about a year now. it's a growth company working in B2B. I'm one year out of university, with a major in computer science. I work in the web team, using an Angular ...
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We currently have an architectural setup as described below. Our plan is to conduct a load test, but we face a challenge due to the high cost of real switches. We have two options: either build the ...
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I am trying to get a better understanding of TDD. From a quick google I've found this: In layman’s terms, Test Driven Development (TDD) is a software development practice that focuses on creating ...
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I'm currently scratching my and my colleagues head about whether and how we could test SyncService::syncFoo in any meaningful way that does not involve basically recreating the whole call tree as ...
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I was programming today and encountered something that just feels like I'm doing something wrong (maybe?). I've encountered this situation before, but I wanted to reach out and ask if there's a better ...
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About tests: I have the following view on nomenclature: Unit tests are the kind of testes where you have a function ExtractBacon, where there is a function with an entry parameter Pig and a return of ...
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I am talking about these two testing strategies : Have a pyramid of tests (with many more unit tests than high-level tests), because high level tests are harder to maintain and slower (see also : ...
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Suppose you have been put in charge of an already existing project. As you are starting to familiarize yourself with the repository, you notice a few technical debt issues (insufficient test coverage, ...
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Let's suppose I want to follow TDD (Test driven development) and I want to implement a class that is supposed to return a considerable object. It starts to get really complex in my opinion and doesn't ...
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In university, we were introduced to the two terms "verification" and "validation". The definitions can be summarized as follows: Validation checks that the specifications and ...
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Another name for this question could be: How to TDD the main function? My situation: I'm writing a program from scratch that runs a sort of simulation, and I want to apply TDD to the whole development ...
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There are two schools of thought on how unit tests should be written. The first is the Classical/Chicago school, which focuses on the isolation of unit tests, describes a unit as a class or set of ...
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When in the refactoring step of a TDD process, if we "factor out" some common functionality from two (or more) code modules, how do we avoid that "factored out" code not being ...
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I've been working on a personal project for some time, and I believe that I'm at that point where, if I don't embrace unit tests (and ideally TDD) now, it may be too late, so I want to make the right ...
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I'm following roughly the TDD style as explained in the "Obey the Testing Goat" book: You have a functional test for your (Django, in my case) web app that tests the observable behaviour via ...
Lagerbaer's user avatar
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Well, I'm developing a personal project using TDD and Clean Architecture, and I chose to build an abstract class to gather all use-cases behavior in one single class. My question is: What you think ...
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How do I solve this riddle of contradicting "good practices" to properly cover my app with unit-tests? These are principles I found about writing unit-tests: Pyramid of testing says unit-...
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Well, we all know the main concept of TDD: write a failing test, then implement the testing component to make your test pass. I've been working on a personal project in Clean Architecture following ...
Gabriel Antonio's user avatar
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I have a domain entity called a "Booking Window" that has a Start Date and End Date, and defines a period in which a Member can make a Booking.  The business is a mobile car wash, and ...
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Im making a website and trying to learn Test Driven Development (TDD) I'm doing one of CS50 projects, were we need to make a website to trade stocks. I decided to use this oportunity to learn TDD. I ...
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Doing TDD in a kata is simple. A red test, small amount of code, green test, and refactor. Repeat. And that's it. But, I work on a real application. With a REST controller, a service layer for ...
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In front-end projects(made in frameworks like Angular or React), when we correctly encapsulate complex functionalities, the components that really have some relation to the business logic normally ...
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I have to create a CLI application following TDD. The app should present a menu of items that can be added to an internal structure, and process those items according some rules. My question is if I ...
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I'll be using Uncle Bob's terms, so i'll call the use cases "interactors" and the domain entities "entities". As far as I understand, the most specific business rules that are most ...
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In a TDD (Test-Driven Development)-based Java project built by maven, lots of classes needs to be tested with text-based input files such as .csv. At the beginning, I put them into the src/test/...
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I find when I am programming and I fix a bug in one area of the codebase, sometimes something slightly related or maybe unrelated breaks, and as a result I usually copy and paste the fix to a ...
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When writing tests for TDD is it good (or bad) practice to write multiple test for the same requirement ? If it's good how many times should it be repeated? If it's bad is it it the QA engineers work ...
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How much (if any) unit tests should be written when you start a new templated project? In particular, let's take as an example a typical .net framework template for asp.net mvc or other similare ones ...
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This is my specific situation: I am following DDD and Event sourcing to implement my application (using C#). I have a Domain layer that contains Aggregates' implementation. I write unit tests for this ...
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Let's say I want to add tests to a software that has some flaws/bugs. I want to add the tests before I fix the bugs. And I want to actually merge them in the main branch, not just have them in a ...
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I am trying to adpot a TDD process. I am a bit confused when it comes to testing an Api. I know for sure that the status and the response should be tested. But I am thinking if whether or not I should ...
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I'm learning and trying TDD recently, and I constantly encounter a situation when I need to ditch my current test because it's too broad. I don't know how to deal with it. To be more specific, let's ...
Searene's user avatar
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How should I go about using TDD and writing tests in this scenario? Suppose we have request handler classes. In short, a handler applies a "request" (e.g. Update details) to an entity then ...
ilitirit's user avatar
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I am unsure where/how to specify the behavior of a mock in a test scenario when using the Given-When-Then syntax. It seems to me both Given and When could be correct. Consider the following example: ...
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When doing TDD "by the book" we should only -- as far as I understand -- write failing tests. This means tests for unimplemented functionality. I often find myself wanting to add tests for ...
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