UseCase Best Practices (Kotlin / Clean Architecture) UseCases (also called Interactors) represent one business action in Clean Architecture.Well-written UseCases make your app clean, testable, and scalable. This guide gives you real-world best practices, anti-patterns,...
Clean Architecture with Kotlin (Complete & Practical Guide) Clean Architecture is a way to structure your Kotlin (especially Android / Backend) projects so that they are: Easy to maintain Easy to test Independent of...
UI Testing with Jetpack Compose + Coroutines (Complete Guide) Testing Jetpack Compose UI that uses coroutines, StateFlow, and ViewModel is a must for modern Android apps.This guide covers setup → ViewModel → Compose →...
Android ViewModel Coroutine Testing (Complete Guide) Testing ViewModel coroutines is a critical skill in modern Android (MVVM).The goal is to test business logic, StateFlow / LiveData, and coroutine behavior without Android framework dependencies. 1....
Coroutine Testing (Kotlin) — Complete Guide Testing coroutines correctly is essential to avoid flaky tests, real delays, and race conditions.Kotlin provides kotlinx-coroutines-test to test coroutines deterministically. 1. Why Coroutine Testing Is Special Problems with...
SupervisorJob (Deep Explanation) SupervisorJob is an advanced coroutine construct used to prevent failure of one coroutine from cancelling its siblings.It is critical for building stable apps, especially in Android ViewModels, servers, and concurrent systems....
Coroutine Exception Handling (Kotlin) Handling exceptions in Kotlin Coroutines is different from normal try–catch, because coroutines are asynchronous and follow structured concurrency. This guide explains all important rules, patterns, and best practices. 1. Basic...
Flow Backpressure & Buffer (Deep Explanation) In Kotlin Flow, backpressure means what happens when the producer emits data faster than the consumer can process it.Flow is designed to handle this safely and automatically, unlike...
Kotlin Channels Kotlin Channels are a coroutine-based way to send and receive values between coroutines.They work like a pipe: one coroutine sends data, another receives data. 🔁 Think of Channels as communication tools, not...
Kotlin StateFlow & SharedFlow StateFlow and SharedFlow are hot flows in Kotlin, introduced to handle state and events in a modern, coroutine-friendly way.They are commonly used in Android (MVVM) and backend reactive systems. 1....