@bemedev/app-solid-test

A comprehensive testing library for @bemedev/app-solid state machines and interpreters.

Features

• 🧪 Test state machine interpreters with Vitest
• 🔄 Test state transitions, context changes, and UI thread updates
• ⏱️ Built-in fake timer support (createFakeWaiter)
• 🎯 Convenient test helpers (testBy, matches, contains, hasTags)
• 🚀 Easy assertion helpers for values, context, and UI state
• 📊 Full support for parallel states and hierarchical state machines

Installation

pnpm add -D @bemedev/app-solid-test

Usage

Basic Example

import { createInterpreter } from '@bemedev/app-solid';
import { createTests } from '@bemedev/app-solid-test';

vi.useFakeTimers();

describe('My state machine', () => {
  const interpreter = createInterpreter({
    machine: myMachine,
    options: {
      context: { count: 0 },
    },
  });

  const inter = createTests(vi, interpreter);
  const testValue = inter.testBy(({ value }) => value());
  const testCount = inter.testBy(({ context }) => context(s => s.count));

  it(...inter.start);
  it(...testValue('Initial state', 'idle'));
  it(...testCount('Initial count', 0));
  it(...inter.send('INCREMENT'));
  it(...testCount('Count incremented', 1));
  it(...inter.stop);
});

API Reference

createTests(vi, interpreter)

Creates a test wrapper for an interpreter with helpful testing methods.

Parameters:

• vi: Vitest utilities instance
• interpreter: The interpreter instance to test

Returns: InterpreterTest instance with the following methods:

Test Methods

• testBy(fn) - Create a custom test function

  const testValue = inter.testBy(({ value }) => value());
  const testContext = inter.testBy(({ context }) => context(s => s.data));

• matches(...values) - Assert exact state match

  it(...inter.matches('idle', 'active'));

• contains(...values) - Assert state contains values

  it(...inter.contains('working', 'active'));

• hasTags(...tags) - Assert state has specific tags

  it(...inter.hasTags('loading', 'visible'));

Control Methods

• start - Start the interpreter
• stop - Stop the interpreter
• pause - Pause the interpreter
• resume - Resume the interpreter
• send(event) - Send an event
• sendUI(event) - Send a UI event
• dispose - Dispose the interpreter

Timer Helper

• createFakeWaiter - Create a fake timer waiter

  const wait = inter.createFakeWaiter.withDefaultDelay(1000);
  it(...wait()); // Wait 1000ms
  it(...wait(2)); // Wait 2000ms (2 × 1000ms)

Testing UI Thread

const interpreter = createInterpreter({
  machine: myMachine,
  options: { context: { count: 0 } },
  uiThread: { counter: 10 },
});

const inter = createTests(vi, interpreter);
const counterUI = inter.testBy(({ ui }) => ui(s => s?.counter));

it(...inter.start);
it(...counterUI('Initial UI counter', 10));
it(...inter.sendUI({ type: 'UPDATE', payload: 42 }));
it(...counterUI('Updated UI counter', 42));

Licence

MIT

CHANGE_LOG

...

[0.2.1] - 2025/11/29 => 17:30

• Add peer dependencies for better compatibility
• Enhance package configuration

Version [0.0.1] --> date & hour

• ✨ Première version de la bibliothèque

Auteur

chlbri (bri_lvi@icloud.com)

My github

Liens

• Documentation