Testing Forms and Navigation
Test form submissions, redirects, and multi-page user flows end-to-end.
Testing Forms and Navigation is a free Sveltejs Academy lesson on CoddyKit — lesson 3 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Sveltejs Academy learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Form Submission
Fill inputs and submit, then assert on the result.
await page.getByLabel("Email").fill("a@b.com");
await page.getByRole("button", { name: "Submit" }).click();
await expect(page).toHaveURL("/dashboard");Validation Errors
Test that invalid inputs produce visible error messages.
await page.getByRole("button", { name: "Submit" }).click();
await expect(page.getByText("Email required")).toBeVisible();Server-Side Errors
Mock the API or seed the DB to trigger server-side validation paths.
Redirect Flows
After login, assert the new URL and elements unique to the destination page.
Browser Navigation
Use page.goBack() and page.goForward() to test history.
Cookies and Auth
Sign in once and reuse state with storageState for faster suites.
CSRF
SvelteKit's built-in CSRF protection is automatically handled when you use real form submissions.
Progressive Enhancement
Test forms work even when JavaScript is disabled by toggling browser settings.
Multi-Step Forms
Use a Page Object to encapsulate steps; assert intermediate state if needed.
Network Mocking
Intercept API calls with page.route() for deterministic tests.
await page.route("**/api/items", route => route.fulfill({ json: [] }));Visual Regression
Snapshot key pages after submission to catch unintended UI changes.
Quick Check
How do you reuse login state across tests?
Recap
Test full user flows: forms, navigation, error states. Use mocking and storageState to keep suites fast and reliable.
Frequently asked questions
Is the “Testing Forms and Navigation” lesson free?
Yes — the full text of “Testing Forms and Navigation” is free to read here on the web, and the Sveltejs Academy course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Sveltejs Academy course, upgrade to CoddyKit PRO.
What will I learn in “Testing Forms and Navigation”?
Test form submissions, redirects, and multi-page user flows end-to-end. You practise Sveltejs Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Sveltejs Academy?
No prior experience is required. Sveltejs Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 3 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “Testing Forms and Navigation” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Sveltejs Academy lesson?
Yes. Every Sveltejs Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- Playwright Setup in SvelteKit
- Writing Page Interaction Tests
- Testing Forms and Navigation
- CI Integration