JVM - HelpMeTest

Scala

ScalaTest: FlatSpec vs FunSuite vs WordSpec, Matchers, Fixtures, and Parallel Execution

ScalaTest is the most widely used testing framework for Scala, offering multiple spec styles to match different team preferences. This post covers when to use FlatSpec, FunSuite, and WordSpec, how to write expressive matchers, manage shared fixtures, tag tests for selective runs, and speed things up with parallel execution. ScalaTest

Java

async-profiler and YourKit: JVM Performance Profiling in Production

async-profiler is a low-overhead sampling profiler for JVM applications that generates flame graphs showing where CPU time is spent. YourKit is a commercial profiler with deeper analysis. This guide covers attaching both profilers to running JVM processes, reading flame graphs, finding memory leaks, and profiling in production environments.

Scala

Akka TestKit: Testing Actors, FSMs, and Actor Lifecycles in Scala

Testing actors is fundamentally different from testing ordinary objects.

Latest

ScalaTest: FlatSpec vs FunSuite vs WordSpec, Matchers, Fixtures, and Parallel Execution

async-profiler and YourKit: JVM Performance Profiling in Production

Akka TestKit: Testing Actors, FSMs, and Actor Lifecycles in Scala