Unit Testing Configuration Properties and Profiles

Overview

This skill provides patterns for unit testing @ConfigurationProperties bindings, environment-specific configurations, and property validation using JUnit 5. Covers testing property name mapping, type conversions, validation constraints, nested structures, and profile-specific configurations without full Spring context startup.

Key validation checkpoints:

• Property prefix matches between @ConfigurationProperties and test properties
• Validation triggers on @Validated classes with invalid values
• Type conversions work for Duration, DataSize, collections, and maps

When to Use