#unit-testing

Your Coroutine Tests Are Flaky Because You Have Two Clocks Running

I’ve seen many projects where coroutine tests were flaky. All green on my machine. Occasional red tests running the suite in managed…

Birim Testi (Unit Test) Neden Gereklidir?

Yazılım geliştirirken en sık karşılaşılan sorunlardan biri, kodun bir yerini güncellerken farkında olmadan başka bir işlevi bozmaktır…

Testing a Node.js API with Playwright: A Beginner’s Guide

Most people know Playwright as a tool for automating browsers, but it’s also a solid choice for testing REST APIs directly. It ships with a…

Testing Strategies in Software Development: A Practical Guide for Developers Who Skipped Testing…

How to think about testing, how much of each type you actually need, and how AI is changing the game -explained with real-world examples.

The Test Cases You Forgot: Generating Adversarial Swift Fixtures with a Macro

Your test suite has a User(id: 1, name: "Ada", isActive: true) in it somewhere. It renders fine. It always renders fine.

Kotlin Architecture Tests: What They Are and Why They Matter - Part 1/3

A Kotlin project can compile, pass its unit tests, satisfy its linter, and still become structurally harder to change. Architecture tests…

Testing Without Postman: Jest, Mocks, and the Event Bus That Almost Got in the Way

Why manually clicking through a dozen services stopped working, and how automated tests took over.

Advanced Mockito: Argument Captors, Spies, Answers, and Mocking Pitfalls

Most Java developers know exactly one Mockito incantation: when(x).thenReturn(y). It's the first thing you learn and, for many, the last…

Fakes vs Mocks in Testing

One topic in the Android community that often lacks clarity is the use of fakes and mocks in testing. Some developers strongly prefer one…

Stopping AI Test Slop: A JUnit Best-Practices AI Skill

AI coding agents write unit tests fast, confidently, and in bulk. None of that guarantees the tests are any good.

Testing in .NET #1 — Unit Testing ile Sağlam Temeller Atmak

Test Neden Yazılır?

NUnit vs xUnit vs MSTest vs TUnit: Which .NET Testing Framework Should You Choose in 2026?

When starting unit testing in .NET, one question comes up again and again:

Unit Testing in .NET 10 Using xUnit

Like 99.99% of developers on planet Earth, I didn’t like testing at the beginning of my career (obviously, I had total confidence in my…

Mutation Testing: The Secret Weapon Your Test Suite Is Missing

Your code has 90% test coverage. Your CI pipeline is green. You ship confidently and then production breaks. Sound familiar?

The Painful Truth About Automated Testing: When Writing Tests Takes Longer Than Building the System

Why many engineering teams struggle with testing, and why the answer isn’t simply “write more tests”

Stop Chasing 100% Test Coverage: Android Testing in 2026

The Android ecosystem has evolved dramatically over the past few years. With Jetpack Compose becoming the dominant UI framework, faster…

Membuat Unit Testing sederhana dengan Jest pada NestJs

Implementasi unit testing pada NestJs dengan Jest

Refactoring from an Anemic to a Rich Domain Model in .NET

Learn to cure the Anemic Domain Model in .NET. Encapsulate business logic in C# entities, configure EF Core, and simplify unit testing.

BaseViewModel Pattern for Multi-Module Android Apps

A common pattern in Android applications is the “base” ViewModel. It contains functionality that all, or many, ViewModels share, and that…

Stop Rendering the DOM: The Ultimate Hack for Enterprise Angular Testing

When your Angular project scales to the enterprise level, one thing that inevitably scales with it is your unit test suite — growing from…

GTest and short-circuit evaluation in C++

What is short-circuit evaluation in C++?

Part 2: Unit Testing React Navigation 7

Hey everyone! Welcome back.

The Unit Test Scam: How Hollow Unit Testing Is Costing Your Business More Than You Think

Let’s imagine you’re a supermarket security guard, tasked with completing routine security checks every night and submitting a report…

The Real Cost of Bugs: Why QA Matters More Than Ever

Recently in our company, I got the opportunity to speak and take presentation about why QA matters and the real-world challenges QA teams…

What I Actually Test in My Android Apps (And What I Stopped Testing)

A practical take on unit testing in Kotlin — with a real ViewModel + Repository example you can copy.

Your Code Will Fail Successfully: The Hidden Trap of Asking AI for Unit Tests

There’s a new anti-pattern quietly spreading across software teams, startups, side projects, and even enterprise environments. It looks…

Get 80%+ Java Unit Test Coverage in IntelliJ with JAIPilot in One Click

AI-powered high coverage unit tests for Java — generate, run, and fix tests automatically inside IntelliJ.

Are Unit Tests Still Enough in the Age of AI-Generated Code?

Artificial Intelligence is rapidly changing how software is built. Today, many engineering teams use AI assistants to generate boilerplate…

MapStruct Mapper Strategy: A Complete Guide from Beginner to Architect

Let me walk you through this concept layer by layer, so you can explain it confidently at any level of depth the interviewer probes.

Every Bug Is a Test No One Wrote

A test suite should be big and tell the story of production issues vanquished by might automated tests

Why I started writing unit tests for my React apps (and why it actually mattered)

Why I feel the necessity of Unit Testing (skip if you don’t like stories 😜)

Unit Tests — Your Code’s Loudest Critic | Go Forth And Test

Most of what your team is writing in Selenium today should be a unit test, and you don’t believe me yet.

I Stopped Testing Everything Through APIs, Here’s Why I Prefer Testing Business Logic Directly

When I first started writing backend tests, my instinct was simple:

การทำเทส API ด้วย Bruno และ Mountebank ชีวิตดีๆ ที่ลงตัว

เคยไหมครับที่พัฒนาระบบเสร็จแล้ว แต่พอถึงเวลาเทสกลับรู้สึกว่ามันใช้เวลานานและวุ่นวายไปหมด? ลองดูแนวคิดจากภาพ Test Pyramid…

Line vs. Branch Coverage: Which Metric Actually Guarantees Code Quality?

We’ve all seen it: a Pull Request arrives with a sparkling 98% Code Coverage badge. It looks perfect on paper, yet within minutes of…

Android Unit Testing — Interview Questions, Answers & Real Insights

If you’re preparing for Android interviews, unit testing is one of the most high-signal topics. It’s not just about writing tests — it’s…

.NET’te Test Yazmanın Tam Rehberi — Bölüm 1: xUnit + Moq ile Sıfırdan Profesyonel Testler

Önce Şunu Soralım: Neden Test Yazıyoruz?

【 Java Unit Test學習】- 告別假資料！用實體檔案完美模擬上傳測試 (MockMultipartFile 實戰)

開發檔案上傳 API 時，最讓人心慌的莫過於：「我寫的解析邏輯真的對嗎？前端傳來的檔案格式如果不如預期，程式會不會直接崩潰？」

AI한테 테스트 코드를 맡겼더니 커버리지가 8배 올랐다 🚀

1. 들어가며: 테스트 커버리지 9%라는 현실

Don’t Forget an Answer If Mocking a Function w/ mockk; Watch for “No answer provided” vs "... found"

Mocking HTTP in Haskell — A Clean Approach with Typeclasses

Testing code that makes HTTP calls is tedious in most languages. In Haskell it has an extra wrinkle: the http-simple library gives you an…

【 Java Unit Test學習】- 讓防護網具象化 — 深入解讀測試涵蓋率 (Test Coverage)

前幾篇文章帶大家寫了 Assert、用了 Mockito、也擁抱了優雅的 JUnit 5。我們確實織出了一張防護網，但心裡難免會問：「這張網夠大嗎？有沒有漏掉哪個角落？」

.NET 10 Native MTP Unit Tests in Azure Pipelines

Switch to native Microsoft.Testing.Platform in .NET 10: Run unit tests faster in Azure DevOps CI/CD with full trx reporting.

10 Types of API Testing Every Developer Should Know

Ever used an app that suddenly stopped loading data, threw a weird error, or just froze? There’s a good chance a broken API was behind it.

【 Java Unit Test學習】- 擁抱 JUnit 5 — 告別繁瑣，更優雅的異常處理與參數化測試

在前面的教學中，我們建立了防護網，也學會了測試異常（Exception）。但你是否覺得 JUnit 4 的 try-catch-fail 寫法有點冗長？如果同一個邏輯要測多組邊界值，是不是只能一直複製貼上？

Passing AEM Cloud Manager Quality Gates: A Guide to JaCoCo & Sling Models

​This article explains how unit tests improve code coverage for AEM Sling Models and help development teams meet Adobe Cloud Manager…

Function Mocking on Target Using GNU Linker’s Wrap Feature

On-target? “Blasphemy!”, the clean-code simulation TDD purist years-ago me would have yelled.

Leveraging Moq in .NET 9 for Robust Unit Testing with NUnit

Testing modern .NET applications often requires isolating dependencies, simulating external services, and verifying interactions. Moq…

【 Java Unit Test學習】- 深入 Mockito 實戰 — 驗證 Service 層與互動行為

在先前的文章中，我們已經成功手把手建立起第一道代碼防護網，並且學會了如何在 HelloController 中透過 Mock 模擬 HttpServletRequest 請求。

【 Java Unit Test學習】- 除了測成功案例，別忘了測異常的單元測試檢查

在上一篇手把手寫 Java 單元測試，建立第一道代碼防護網中，我們學會了如何使用 JUnit 5 建立基礎的測試，為程式碼架起第一道安全防線。