composable-svelte-testing

What problem does it solve?

Testing patterns for Composable Svelte enable teams to validate business logic without UI integration, ensuring reducers and effects behave deterministically.

Core Features & Use Cases

• Exhaustive state testing with TestStore's send/receive pattern.
• Mock dependencies (API, clocks, websockets) to simulate real-world scenarios.
• Guidance on composing reducers, testing nested scopes, and validating side effects.

Quick Start

Install the testing utilities and write a simple TestStore-based test:

• Create a TestStore with an initial state, reducer, and mocked dependencies.
• Dispatch actions with store.send and assert intermediate state.
• Handle effect outputs with store.receive and assert final state.
• Call store.finish() to ensure there are no pending actions.