Property-Based Testing in Elixir with PropEr

Traditional unit tests only cover the scenarios you can think of, leaving hidden edge cases in your Elixir applications. Property-based testing solves this by automatically generating hundreds of test cases to find bugs you didn't even know existed. In this course, you will learn how to design, write, and refine robust properties using PropEr and Elixir. You will transition from writing manual assertions to defining the core rules of your system, letting the tool do the hard work of finding failures. What you'll learn: Understand the fundamental concepts of property-based testing versus traditional unit testing; Write stateless properties to validate pure functions and data transformations; Create custom data generators to model complex domain logic and edge cases; Analyze test failures and leverage shrinking to pinpoint the exact cause of bugs; Integrate PropEr seamlessly with Elixir's native ExUnit framework; Practice iterative refinement techniques to strengthen your test suites. Starting with foundational concepts and core terminology, you will read through clear explanations of how generators and properties work, then progress through step-by-step written examples of debugging and refining tests. This course is designed for Elixir developers who are new to property-based testing and want to build more reliable software. No prior experience with PropEr is required. Start reading today to elevate your Elixir testing strategy and catch bugs before they reach production.