A Java library for testing XML output via XPath, schema validation, and document comparisons.
XMLUnit for Java is a library that supports testing XML output in Java applications. It enables developers to compare XML documents, validate them against schemas, and evaluate XPath expressions, ensuring XML correctness in automated tests. The library is designed to be independent of any specific test framework while offering integrations with popular ones like Hamcrest and AssertJ.
Java developers and QA engineers who need to test XML generation, transformation, or validation in their applications, particularly those working with web services, data serialization, or configuration files.
Developers choose XMLUnit for its comprehensive XML testing capabilities, clean API, and framework-agnostic design, which allows seamless integration into existing test suites without imposing dependencies on specific testing frameworks.
XMLUnit for Java 2.x
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Offers detailed control over comparison rules with a fluent builder API, as shown in the README's DiffBuilder example, allowing precise difference reporting without static configuration.
Works independently of any test framework while providing integrations for Hamcrest and AssertJ, ensuring flexibility in diverse testing workflows, as highlighted in the philosophy section.
Supports validation against W3C XML Schema and other languages, with examples in the README demonstrating how to validate instances against multiple schema sources.
Includes a compatibility layer for migrating from XMLUnit 1.x to 2.x, addressing the complete rewrite by providing a path for existing users, as noted in the key features.
The README admits to two different AssertJ modules (xmlunit-assertj and xmlunit-assertj3) with varying requirements and OSGi incompatibilities, adding complexity to setup and maintenance.
For features like Input.fromJaxb, users must manually add a JAXB implementation dependency, which is an extra step not automatically handled by the core library.
XMLUnit 2.x is a complete rewrite with no code sharing from 1.x, as stated in the README, which can complicate migration and require significant test updates for legacy projects.