This article presents a universal mocking approach using continuations in Gleam, enabling clean and effective testing of asynchronous or fallible computations by defunctionalizing continuations into a single data type. It demonstrates how to abstract business logic with injectable dependencies for more robust unit tests.
Background
Continuations are a functional programming concept that can represent any monadic computation, allowing abstraction over synchronous/asynchronous and error-prone operations. This post builds on prior work to show how defunctionalized continuations enable flexible mocking strategies for testing.
- Source
- Lobsters
- Published
- Jul 30, 2026 at 09:41 PM
- Score
- 6.0 / 10