unit-test-config-properties
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
@ConfigurationPropertiesand test properties - Validation triggers on
@Validatedclasses with invalid values - Type conversions work for Duration, DataSize, collections, and maps
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