Overview

Svelte-mock is a powerful utility designed for testing Svelte components with ease. By providing a clear and structured way to mock and validate component functionality, it allows developers to focus on building robust applications while ensuring their components behave as expected. With features integrated directly into Jest, it streamlines the testing process, making it an essential tool for those working with Svelte applications.

This tool is especially beneficial for developers looking to verify various aspects of their components, from instance creation to event handling. With svelte-mock, you can confidently test the vital interactions and properties of your Svelte components, leading to more reliable and maintainable code.

Features

Expect Extensions: Offers powerful extensions to Jest’s expect functionality for testing Svelte components, ensuring a more concise and readable testing process.
toHaveInstance: Verifies that a mocked component has been instantiated at least once, helping confirm that your component lifecycle is functioning correctly.
toHaveInstanceWithProps: Checks if a component instance has been created with specific properties, ensuring the right data is being passed to your components.
toHaveInstanceWithBoundProps: Tests for instances of a component that are using bound props, allowing for validation of reactive behavior.
toHaveInstanceWithSlots: Ensures that a component instance includes the necessary slots, guaranteeing that your component's structure aligns with your expectations.
toHaveEventHandlers: Validates that a component instance contains the specified event handlers, crucial for handling user interactions properly.
Query Functions: Provides useful querying options like getInstanceByProps, getInstanceByBoundProps, getInstanceBySlots, and getInstanceByEventHandlers, which streamline the process of locating specific component instances based on their properties and behaviors.

Svelte-mock is an indispensable addition to any testing toolkit for Svelte, ensuring developers have the means to rigorously and efficiently test their components.

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Svelte Mock