sveltekit-remote-functions-parallel-e2e-tests

An isolated, parallel E2E testing setup for a SvelteKit app using Remote Functions and Bun. Each test case runs against its own dedicated PostgreSQL database, so tests can run concurrently without cross-test interference.

This repository also includes a CI workflow that runs the E2E suite automatically on every pull request.

You can find a detailed blog post explaining the approach here.

What this repo demonstrates

• Parallel E2E execution without flaky shared state
• Per-test database isolation (a fresh DB per test case)
• A minimal SvelteKit app using Remote Functions
• A test runner workflow powered by Bun, Playwright and testcontainers
• CI automation to run the E2E tests in a clean environment

Prerequisites

• Bun
• Docker (or a compatible container runtime, e.g. Podman)

Running the tests

Run the full E2E suite:

bun run test

Notes:

• The first run may take longer because Docker images need to be built and dependencies pulled.
• Tests are designed to run in parallel; database state is isolated per test case.

Local development

Start PostgreSQL (via Docker)

docker compose up db

Configure environment variables

Create a .env.local file:

POSTGRES_URL=postgresql://postgres:postgres@localhost:5432/svelte

Start the dev server

bun --bun run dev