Application Test Library

Application Test Library gives Dynamics 365 Business Central development teams a unified set of testing libraries to build high-quality tests with confidence. Instead of hand-coding test data setup, function invocation, and outcome verification for every scenario, developers work from a consistent, reusable structure that keeps tests robust as the product evolves. It is a practical accelerator for any organization that treats test quality as part of its AL development standard.

Key Capabilities

• Reusable test logic — encapsulates common steps for creating test data, invoking application functionality, and verifying results, so teams avoid duplicating effort across tests.
• Change-resilient tests — centralizing shared logic helps keep tests stable when the underlying product changes.
• Supports multiple test types — designed for unit tests, scenario tests, and AI-focused tests within the AL test framework.
• Cross-environment execution — tests written with these libraries can run in both SaaS and On-Premises environments.
• Streamlined testing flows — wraps the end-to-end testing process in Business Central into a consistent, repeatable structure.

Integration & Compatibility

The libraries are built for Dynamics 365 Business Central and integrate directly with the standard AL development and testing toolset. They are available for all editions of the platform that support that toolset and are usable in all regions where the platform is available. Tests can execute across SaaS and On-Premises deployments, though in SaaS the libraries can only be installed on Sandbox environments. Documentation and libraries are provided in English (United States).

Who It's For

This offering suits Business Central implementation partners, independent software vendors, and internal development teams that maintain customizations or extensions and need dependable automated testing. It is particularly relevant for QA leads, AL developers, and technical architects responsible for release quality, regression safety, and reducing the maintenance burden of test suites — especially teams adopting AI-assisted testing or operating across mixed cloud and on-premises environments.