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Improve partner onboarding and documentation navigation (#174)
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Lead with a complete plugin quick start and add task-oriented usage, troubleshooting, customization, and contribution guides. Preserve the broader plugin framing, correct conflicting contract guidance, support Agents folder reviews, and align repository validation. Convert existing sample references to clickable links without changing knowledge rules.

Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
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Jesper Schulz-Wedde 2026-09-09 17:31:03 +02:00 • committed by GitHub
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microsoft/knowledge/interfaces/assign-codeunit-to-interface-for-testability.md
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@ -17,10 +17,10 @@ An interface variable can hold any codeunit that `implements` the interface, ass
Declare the dependency as an `Interface` variable on the consumer and supply the implementation from outside — typically setter injection through a procedure that takes an `Interface` parameter, or a parameter on the entry method. Production passes the real implementation codeunit; a test passes a test-double codeunit that implements the same interface with deterministic behaviour. Because a codeunit assigns to an interface variable directly, no enum or factory is needed for the injectable case. The consumer's logic is then verifiable in isolation.
See sample: `assign-codeunit-to-interface-for-testability.good.al`.
See sample: [`assign-codeunit-to-interface-for-testability.good.al`](assign-codeunit-to-interface-for-testability.good.al).
## Anti Pattern
A consumer that declares its dependency as a concrete `Codeunit "..."` variable and calls it directly. The collaborator cannot be substituted, so a unit test either runs the production side effects or cannot cover the consumer at all. Detection signal: a `var` of type `Codeunit "<concrete impl>"` used for a collaborator that has — or could have — an interface, especially one that performs I/O, posting, or external calls. Extract an interface, depend on the interface variable, and inject the implementation.
See sample: `assign-codeunit-to-interface-for-testability.bad.al`.
See sample: [`assign-codeunit-to-interface-for-testability.bad.al`](assign-codeunit-to-interface-for-testability.bad.al).