Workspace overview

Sandbox ready

New to Testbox?Take the quick tour, or export a starter suite for your preferred framework.

Automation workspace

What do you want to test?

Choose a realistic workflow, inspect its selectors, and turn interactions into repeatable automated tests. No setup or account required.

52practice domains
1,300+stable selectors
8frameworks

Workspace coverage0%

0 of 52 sections explored

Start with any practice section below.

Goal mastery0 / 172

Recommended first lab

Forms & Inputs

Practice validation, OTP, uploads, dates, and reliable form state.

Practice domains

Start with a real workflow

Built-in workbench

Move from action to test

Open a tool without leaving your current workflow.

Data Tables

Select all users	ID	Name	Email	Role	Actions

Inline-Edit Table

Click a task name to edit it in place (Enter saves, Esc cancels). Edits: 0

ID	Task	Owner	Status	Progress

Expandable Orders (Master-Detail)

Click the chevron to expand an order and reveal its line-item detail. Expanded: 0

	Order	Customer	Date	Total	Status

Inventory Status Table

Filter by status tabs, spot the priority chips and progress bars.

Invoice	Product	Qty × Price	Status	Priority	Fulfilment

Hierarchical Tree Table

Expand folders to reveal nested files — practice depth-aware selectors.

Name	Type	Size

Live Stock Table (updates every 1s)

Ticks: 0 · Paused

Symbol	Price	Change	Last update

Table States (Loading / Empty / Data)

Switch the table between its loading skeleton, empty state, and populated state — classic state-assertion practice.

User Interactions

Kanban (Drag & Drop)

📋 To Do

Setup tests

Write specs

🔨 In Progress

E2E suite

👀 Review

✅ Done

Star Rating

Click to rate

Context Menu

Click Events

Last event:

—

Click count: 0

Keyboard Events

Key

—

Code

—

Modifiers

—

Events fired: 0

Sortable List

Drag items to reorder:

🍎 Apples#1
🍌 Bananas#2
🍒 Cherries#3
🍇 Grapes#4
🍊 Oranges#5

Current order: 1,2,3,4,5

Hover & Focus

Hover over the boxes:

Hover me

Focus / blur (tab through):

Last: —

Drag & Drop Zone

Drag items from left to the drop zone:

📦 Item A

📦 Item B

📦 Item C

Drop items here

Dropped: 0 items

Scroll & Resize

Scrollable container:

Scroll item 1

Scroll item 2

Scroll item 3

Scroll item 4

Scroll item 5

Scroll item 6

Scroll item 7

Scroll item 8

Scroll item 9

Scroll item 10

Scroll position: 0px

Resizable element (drag corner):

Window size:

Tooltips & Popovers

Hover for tooltips:

Tooltip on top

Tooltip on right

Tooltip on bottom

Click for popover:

Dynamic Content

Timer

00:00:00

Toasts

Progress Bars

Upload Progress0%

Build Progress0%

Test Coverage87%

Skeleton Loaders

Loaded User

user@test.com

Spinners & Loaders

Standard

Thin

Quarter

Icon

Alerts

Success!

Your changes have been saved.

Info

New features available.

Warning

Please review before continuing.

Error

Something went wrong.

Modal Dialog

Countdown Timer

Start

seconds remaining

Infinite Scroll

Scroll down to load more items...

Items loaded: 0

Dynamic Elements

Click "Add Element" to create dynamic elements

Element count: 0

Polling Job Status

Background Job Idle

No active polling job

Attempts: 0

Loading Button States

Buttons switch between idle, loading, success, and error states.

Live Activity Feed

No live events yet

Dismissible Banners

Scheduled Maintenance

System update planned for tonight at 11:00 PM UTC.

New Release Available

Version 2.1 introduces enhanced recorder support and improved selectors.

Navigation Components

Tabs

Content for Tab 1

Accordion

Media

Image Gallery

Snow-capped mountain peak above an alpine lake at sunset

Tropical beach with turquoise water and palm trees

Sunbeams filtering through a lush green forest

Waterfall cascading through a tropical rainforest

Colorful autumn forest path with maple leaves

Aurora borealis over snowy mountains at night

Waves crashing against rocky ocean cliffs

Lazy-loaded images with descriptive alt text — assert on alt, naturalWidth and lazy-load behavior.

Responsive Image

City skyline at dusk with glowing towers

Use picture/srcset to serve art-directed images per breakpoint.

Video

Test play/pause, currentTime, buffering and the ended event.

Audio

Test playback, seeking and volume controls.

API Testing Studio

Compose mock requests, validate contracts, generate automation, and run repeatable API collections without leaving the browser.

Hosted contract lab

Deterministic REST and GraphQL simulations using the app.uassert.com API base URL.

EnvironmentHosted mock

Last status—

Assertions0 / 0

Requests0

Mock collection

Choose a contract to load it into the request builder.

Users service 5

Commerce & GraphQL 2

Reliability cases 4

Saved requests 0

Save a request to replay it later.

Request builderCompose parameters, authorization, headers, and JSON bodies.

https://app.uassert.com/api/users

Query parameter

The enabled parameter is merged into the endpoint without mutating the saved request.

Response inspectorBody, response headers, and executable assertions.

— — ms— B

// Ready. Send a request or run the collection.

Contract assertionsRun after every request.

Status equals

Latency under

JSON path contract

Content-Type

Waiting for a responseAssertions run automatically after Send.

Automation starterGenerated from the live request and assertions.

Failure injectionExercise loading, timeout, and recovery behavior.

Normal profile · approximately 300 ms.

Collection runnerExecute repeatable contracts and export a machine-readable report.

GETUsers contract200 · users array existsQueued POSTCreate user201 · generated id returnedQueued GETAuthentication error401 · error code contractQueued GETRate-limit response429 · Retry-After headerQueued

Result Not runPassed 0Failed 0Duration —

Request historyReplay the eight most recent requests.

No requests yet

Advanced

Shadow DOM

Clipboard

Storage Lab

sessionStorage vs localStorage · TTL expiry · cross-tab sync (open a second tab!).

sessionStorage (per-tab)

Survives reload, dies with the tab.

localStorage (persistent)

Persists across tabs & sessions.

TTL expiry (20s)

(none)

Cross-tab sync (BroadcastChannel)

Banking & Finance

44 Elements

Checking Account

$12,450.00

Account ****4521

Savings Account

$45,230.00

Account ****7892 · 4.5% APY

Credit Card

-$2,150.00

Card ****3345 · Limit $10,000

Transfer Funds

From Account

To Account

Amount ($)

Memo (optional)

Bill Pay

Payee

Pay From

Amount ($)

Schedule Date

Recent Transactions

Amazon Purchase

Dec 15 · Checking

-$156.99

Salary Deposit

Dec 14 · Checking

+$5,500.00

Restaurant

Dec 13 · Credit Card

-$45.00

Gas Station

Dec 12 · Credit Card

-$62.40

Freelance Payment

Dec 11 · Checking

+$1,200.00

Rent Payment

Dec 1 · Checking

-$1,800.00

Loan Calculator

Loan Amount ($)$25,000

Interest Rate (%)6.5%

Term (years)5

Monthly Payment

$489

Total Interest

$4,358

Total Repayment

$29,358

Account Statements

Period	Account	Opening	Closing	Status
Dec 2024	Checking	$8,200.00	$12,450.00	Ready
Nov 2024	Checking	$6,850.00	$8,200.00	Ready
Dec 2024	Credit Card	-$1,420.00	-$2,150.00	Pending	—

E-Commerce

32 Elements

Cart 0

Cart is empty

Store Tools

Wishlist: 0

Orders: 0

Order History

No orders yet

Multi-Step Checkout

4 Steps · Validation

Shipping

Payment

Review

Done

Shipping Information

First Name *

First name is required

Last Name *

Last name is required

Email *

Valid email is required

Address *

Address is required

City *

Required

State *

Required

ZIP *

5-digit ZIP

Same as billing address

Payment Details

Credit Card

PayPal

Apple Pay

Card Number *

Valid 16-digit card number required

Expiry *

Invalid

CVC *

Required

Name on Card *

Required

Order Review

Shipping

Payment

Subtotal$259.97

ShippingFree

Tax$26.00

Total$285.97

Order Placed!

Thank you for your purchase.

Order #ORD-000000

Confirmation email sent to

Rich UI Patterns

Phase 2

Date Range Picker

Start Date

End Date

Selected: None

Rich Text Editor

Characters: 0

Signature Pad

Color:

CAPTCHA Simulation

I'm not a robot

reCAPTCHA

Solve:

Select all squares with

Flaky Element Simulator

Testing Challenge

Practice writing resilient selectors and waits. These elements randomly appear, disappear, move, or go stale — exactly like flaky elements in real apps.

Disappearing Elements

These buttons randomly hide for 1-3 seconds then reappear.

Moving Elements

This button randomly changes its position.

Stale Element Reference

This element gets re-rendered on each click (new DOM node, same testid). Tests must re-query.

Element v1

dom-id: 1

Delayed Appearance

Trigger elements that appear after random delays (1-5s). Practice wait strategies.

No delayed elements yet

Insurance

10 Elements

Quote Calculator

Coverage Type

Age30

Coverage ($)100,000

Deductible ($)500

Estimated Monthly Premium

Claims

CLM-2024-001

Auto - Fender bender

In Review

CLM-2024-002

Home - Water damage

Approved

CLM-2024-003

Auto - Windshield

Denied

Real Estate

10 Elements

Min Price$0

Max Price$2,000,000

Mortgage Calculator

Home Price

Down Payment %

Rate %

Years

Monthly Payment

POS Terminal

10 Elements

Products

Current Order

No items

Subtotal$0.00

Tax (8%)$0.00

Total$0.00

Payment

$0.00

Email Client

12 Elements

Inbox

Sent

Drafts

Trash

Calendar & Scheduling

8 Elements

Sun

Mon

Tue

Wed

Thu

Fri

Sat

WebSocket / Real-Time

A simulated WebSocket: connect, watch a stock ticker and a chat feed stream in, then enable flaky mode to see random drops and auto-reconnects — just like a flaky real-time backend. Practice connection-state assertions and polling waits.

Connection

Disconnected

Connection log — press Connect to begin.

Stock Ticker (updates every ~0.9s)

$100.00

Ticks: 0

Live Chat (messages every ~1.6s) — received: 0

Connect to start receiving messages.

Authentication & Sessions

The most-tested flow in real apps, simulated client-side: an OAuth2/SSO dance, a rotating TOTP code, token expiry → 401 → refresh, and remember-me storage.

OAuth2 / SSO Dance

Idle — not authenticated

TOTP 2FA

This authenticator code rotates every 30 seconds — typing takes time, so test the race.

------

Session Expiry

Expire in (s):

Not started — sign in first

After expiry the protected resource returns 401 until you refresh.

Remember Me & Storage

Keep me signed in (persist token to localStorage)

Uncheck to use in-memory (sessionStorage-like) storage — reload wipes it. Watch the Storage line in the SSO card.

Demo token saved under ts_auth_demo. Reset All Data clears it.

File Upload & Download

Practice the two awkward test areas: setInputFiles with size/type validation and progress, and download assertions (filename + content). Everything is simulated in-browser.

Upload

Drag & drop files here or

JPG, PNG, PDF, DOC, TXT, CSV — max 10MB

Upload history

No uploads yet

Download Generator

Format

Type

Suggested filename: invoice-sample.pdf

Visual Regression Playground

Capture a baseline, switch between 3 mutations (shifted element, changed color, removed text), and run a pixel diff that highlights changed regions — the same idea as Percy / Applitools / toHaveScreenshot, running entirely in your browser.

Screen (component under test)

Baseline

No baseline yet

Pixel Diff

Baseline (captured)

Capture a baseline to start diffing.

—

Tolerance 2%

Raise the tolerance and watch a real diff failure become a pass — exactly how flaky screenshot tests get muted.

Animation & Reduced-Motion

0 Elements

Practice asserting on CSS animations (play-state, duration, animationend) and the accessibility rule: honor prefers-reduced-motion. Toggle the simulation and watch animations disable — exactly what tests should verify.

Animated Elements

Slide-in card (2s, 1 iteration)

I slide in — assert animationend or play-state

Ready — press Play.

Spinner

Pulse dot

animationend events: 0

Reduced Motion Simulation

Real apps ship @media (prefers-reduced-motion: reduce) rules. This section simulates that preference — tests should assert animations actually stop.

prefers-reduced-motion: no-preference — animations run normally.

What to assert

With reduce: computed animation-name = none (or duration 0s).
animationend should NOT fire under reduced motion.
Play-state toggles running / paused via animation-play-state.

CSS to assert on

.am-slide { animation: slide 2s ease; }
.am-slide.am-paused { animation-play-state: paused; }
@media (prefers-reduced-motion: reduce) {
  .am-slide, .am-spinner, .am-pulse { animation: none !important; }
}

The am-reduced class on the section simulates the media query for this lab.

Music Player

0 Elements

Now playing: —

—

0:00 / 0:00

Volume

Playlist

Tracks use small embedded WAV clips so playback works offline. Test play/pause, seek, volume, shuffle order and repeat — click a playlist row to switch tracks.

Toast & Notification Testing

0 Elements

aria-live Regions

Screen readers announce changes to aria-live regions automatically. Assert on the region text, not the visual toast.

polite (role="status") - non-urgent

(empty - nothing announced yet)

assertive (role="alert") - urgent

(empty)

Toast Stacking & Dismissal

Toasts mount in #toastContainer (top-right, role="status"). Practice stacking, auto-dismiss timing, and manual close.

What to assert

#toastContainer has aria-live="polite" - assert the attribute.
After Stack: .toast count grows in #toastContainer.
Auto-dismiss: tn-toast-auto disappears after ~3s.
Manual: click the x (tn-toast-manual-x) and assert removal.

Real-world pattern: assert on the live region (what a screen reader hears) rather than toast CSS. Toasts animate out - poll until gone.

Accessibility Tree Viewer

0 Elements

Screen-reader view of any element

Turn Inspect mode ON, then click any element in the app (e.g. a button, input, link) to see exactly what a screen reader announces: its role, accessible name, state, and keyboard position.

Turn on Inspect mode and click any element — or press "Try a demo element".

Cheat sheet

role — button, link, heading, textbox…

name — aria-label > label > placeholder > text

state — disabled, checked, expanded…

focus — is it keyboard-reachable? tab #

Practice: find an element with no accessible name, or a div that should be a button. That's what automated a11y audits flag.

Security Testing

0 Elements

Simulated security scenarios: CORS read failures, cookie flags (HttpOnly / SameSite), CSP violations, and token-storage best practices. Learn what each control blocks — and how to assert it in a test.

CORS (cross-origin reads)

—

Cookie Flags

HttpOnly Session (no Max-Age)

—

Content Security Policy

—

Token Storage

—

Browser APIs Lab

0 Elements

Geolocation (mocked)

Practice the permission prompt: grant or deny, then read a position or watch it move.

No permission asked yet.

—

Web Worker (background thread)

A blob-based worker counts in the background and posts messages — the page never blocks. Try Stop to terminate it.

Worker not started.

—

Observers

IntersectionObserver

Scroll me in & out of view

—

ResizeObserver

resize me

—

MutationObserver

—

Fullscreen API

Request fullscreen on the box below. Note: sandboxed previews may block it — a graceful fallback message teaches why user-gesture rules exist.

Fullscreen target

Not in fullscreen.

Performance / Web-Vitals

Simulate the three Core Web Vitals and practice budget assertions (LCP < 2.5s, CLS < 0.1, INP < 200ms). Learn what degrades each metric — the gap between "it works" and "it’s good enough".

LCP — Largest Contentful Paint

A hero image that loads after a delay.

Delay (ms)

Budget (s)

Hero image

LCP: —

—

CLS — Cumulative Layout Shift

A banner appears above content, pushing it down — layout shift you can measure.

Content below the fold — shifted when the banner appears.

CLS: 0.000

—

INP — Interaction to Next Paint

A button whose handler blocks the main thread.

Block (ms)

INP: — budget 200ms

—

Web Vitals Report

Run measurements to build the report

Localization / i18n + RTL

Switch languages (EN / DE / AR) and watch the layout flip to RTL for Arabic. Notice the deliberately broken translation (a missing key renders as [missing:…]) and the over-truncated long string. Lesson: assert on translation keys, not literal text.

Language Switcher

Welcome

Hello, world!

Items in cart

Total

Date

Close Close

Long string (over-truncates in RTL):

This is a very long untranslated English string that will overflow or truncate awkwardly in narrow RTL layouts.

Number & Date Formats

Formatted with Intl for the current locale — tests that hard-code "1,234,567.89" will break in DE/AR.

Number: 1,234,567.89

Date: —

Switch to DE → "1.234.567,89" and a German date. Switch to AR → Eastern Arabic numerals.

Race Condition & State Lab

The flakiest class of real bugs — timing. Each widget shows the wrong behavior and gives you the right way to test it: fast clicks, out-of-order async writes, debounced search, and click-before-hydration.

Double Submit

Rapid double-clicks: 0 duplicate submissions

The button disables during the 900ms request — click it twice fast to see the guard fail if you bypass it.

Out-of-Order Saves

Make next save slow (900ms)

No saves yet

Save fast (150ms) then slow (900ms): the slow one resolves after and overwrites — "submit A then B, B wins".

Debounced Search

Only the final keystroke fires after a 500ms debounce — assert the last query, not each keystroke.

Click Before Hydration

Clicks before hydration are silently dropped — the classic "works locally, breaks in CI" bug.

Chaos / Error Boundary

Negative testing: crash components on purpose, watch error fallbacks, and practice page.on('pageerror') / page.on('console') patterns. Everything here is safe — it only affects this section.

Crash Zone

Crashes: 0

Each throw fires a pageerror — catch it with page.on('pageerror').

Console Spy

Listen with page.on('console') and assert the message.

Broken Image Fallback

Broken image'">

The onerror fallback swaps in a placeholder — assert the fallback, not the failure.

App-State Reset

Restores crash counter, image, and console status — the "recover from chaos" pattern.

Deeper DOM Labs

Beyond the basics: closed shadow roots, nested shadow hosts, a cross-origin iframe simulation, and dynamically injected styles — the DOM patterns that break naive selectors.

Closed Shadow Root

shadowRoot is null — only piercing automation can reach inside.

Nested Shadow DOM

An open shadow host containing another shadow host. The button inside is reachable via piercing selectors only.

Cross-Origin Iframe Sim

A srcdoc frame simulates the cross-origin lesson — in a real cross-origin iframe, contentDocument access throws.

Dynamic Injection

Watch me get highlighted by injected CSS.

Practice mutation handling: the injected <style> and class appear after click.

Print / PDF Rendering

A printable invoice with print-specific styling, plus a deliberately broken screen-only element that should NOT appear in print. Open the print preview (or print to PDF) and assert on what’s visible.

Invoice

INV-2024-0042

Acme Corp

123 Test St

Item	Qty	Price
Test Automation Suite	2	$99.99
Runner License	1	$199.00

Total$398.98

Screen-only note — hidden in print.

BROKEN: this screen-only element forgot its print:hidden — it will print.

Sortable / Resizable / Slider

Drag & resize practice: a sortable list (mouse drag), a resizable box (drag corner and arrow keys), and a compound slider (two inputs sum live).

Sortable List (drag items)

Alpha#1
Bravo#2
Charlie#3
Delta#4

Order: alpha,bravo,charlie,delta

Resizable Box (drag corner or focus + arrows)

Drag corner or use arrows

Size: 320 × 120

Compound Slider (sum updates live)

A50

B30

Sum: 80

Healthcare & Medical

19 Elements

Patient Directory 5 patients

ID	Name	Age	Dept	Status	BP	Room

Book Appointment

Patient name

Date

Department

Upcoming

No appointments

Prescriptions

Travel & Hotels

17 Elements

Search Hotels

Max price: $300 Available: 5

My Bookings

No bookings yet — book a hotel.

Food Delivery

21 Elements

Your Order

Order is empty

Total$0.00

Education / LMS

20 Elements

Course Catalog

Quick Quiz Score: 0 / 0

What does data-testid help you do?

Crypto & Trading

19 Elements

Market

Asset	Price	24h	Cap	Vol

Portfolio Total: $0.00

Logistics & Shipping

17 Elements

Create Shipment

Shipments

ID	Route	Status	Progress	ETA

Tracking Timeline

Click Track on any shipment to see its timeline.

Select a shipment to track.

Test Case Manager

0 Elements

Each step runs against the real app via the Test Runner interpreter — click Run and it navigates to the section and executes live. Cases persist in your browser.

CI Pipeline Visualizer

0 Elements

A mock GitHub Actions / GitLab pipeline that runs your last real test run (from the Test Runner) through install → lint → unit → e2e → report, then gates the deploy on the flake rate — exactly where E2E sits and why flaky suites block shipping.

Pipeline

E2E runs the real Test Runner suite. If any test failed in your last run, the pipeline stops at E2E — just like CI.

Last Test Run

Deploy Gate

Flake rate = tests that both passed and failed across your run history. Over 20% blocks the deploy.

Platform Tools

TestID Viewer

Click to list

Data Generator

Click a button

Reset

Clear every registered Studio preference, progress record, session value, offline database, and cache. You will review the complete list before anything is removed, and Studio verifies the reset after reload.

Workspace & Progress Report

Export all your progress (goals, runner history, challenges, bug hunt, test cases, recorded steps, theme) as a JSON file — and import it back here or on another device. Download a CSV progress report for instructors or CI.

Achievements

0 Elements

Earn XP by exploring sections, completing goals, solving challenges, finding bugs, running test cases and suites. Complete 15 achievements to collect every badge — and keep your daily streak alive!

Assertion Playground

Pick a target element, pick an assertion, hit Evaluate — the exact same interpreter the Test Runner uses checks it against the live DOM. Change the element's state with the buttons and watch the same assertion flip from PASS to FAIL. The curated examples below include deliberate failures — that's the point. Learn the difference between exist and visible, why contain ≠ have.text, why a placeholder is not a value, and how negations (not.*) work.

1 · Choose a target

Change its state

2 · Try these (includes deliberate failures)

3 · Build an assertion

Assertion

Value

Negate — prefix with not. (e.g. not.be.visible)

Live widgets — the targets above

Message

Mini login

Counter 0

Text input

Checkbox

Subscribe to updates

Removable element

I am a removable element

List (count)

Color swatch

Guided Challenges

0 Elements

Bug Hunt Mode

Toggle ON to seed 12 real bugs across the industry & practice sections — then navigate, spot the bug, and click the buggy element to report it. Track found/total and reset anytime.

Each challenge seeds a bug. Open the section, write an assertion that detects it (it should FAIL while the bug is live), then press Fix the bug and watch your assertion PASS. Solved challenges earn a badge.

Best Practices Library

0 Elements

26 / 26 practices

Rules of thumb for writing tests that survive refactors, run fast, and never flake. Click a category to browse, or type to search (also reachable via Ctrl+K → "Best Practices").

Help center Studio v2.7

What are you trying to test?

Describe a workflow, component, error, or paste a data-testid. Get a live example and framework-ready code without leaving Studio.

Popular

Live contracts Three frameworks Browser-local progress

Your current contextCore

Continue with

Forms & Inputs

Inputs, validation, OTP, and form state

0 selector contracts 0 controls

52: domains
107: guides
3: paths
3: stacks

Start with an outcome

Get to a useful result in one click.

Choose the closest task. You can switch domains or frameworks at any time.

Updated for v2.7

Guidance for the newest workflows.

These focused guides open the live feature, list stable selectors, and include production-shaped examples.

3 release guides

API contractHosted endpoint workflows

Build CRUD, GraphQL, assertion, collection, and failure-mode tests around the canonical base.

https://app.uassert.com/api/users

In-product helpContext-aware guidance

Open Help from a header or card and keep the exact domain and selector contract in view.

data-testid="header-help-docs"

Test casesIntentional save validation

Starter cases load quietly; title and step validation runs only after an explicit save.

tc-new → tc-save

Troubleshooting

Diagnose the symptom before changing the test.

Pick what failed. The runbook keeps the fix observable, reproducible, and tied to a real Studio contract.

Live domain reference

Choose a domain. Inspect its test contract.

Guidance is generated from the controls that exist now—not from a screenshot that can drift out of date.

52 documented

Domain directoryFilter, then choose a domain

Recipe lab

Copy a reliable pattern, then adapt the outcome.

Choose a framework once. Domain examples and all 107 reference guides update with it.

PLAYWRIGHTStable selectors

Why this is reliableThe selector describes the test contract instead of the page styling.

Guided practice

Learn by completing a real workflow.

Each path opens live labs and keeps a browser-local checklist. Resume whenever you return.

3 paths

Searchable reference

Step-by-step guidance for individual workflows.

Groups are collapsed by default to reduce noise. Every guide includes exact selectors, practical advice, and copyable code.

107 guides

107 guides

Support & handoff

Still blocked? Share a reproducible report.

Start with self-service guidance, then take a concise environment and reproduction summary to the community or uAssert team.

Nothing uploads automatically

Prepare the handoff

Copy version, route, selected domain, browser capabilities, viewport, theme, and saved-run counts.

Include a minimal reproduction

Expected result and actual result
Smallest repeatable sequence of actions
Domain route and relevant data-testid
Framework and exact error message

Remove credentials and private fixture data before sharing.

Watch walkthroughsuAssert Learn on YouTube Ask the communityConnect with uAssert on LinkedIn Continue learningCourses and product resources

About Uassert Testbox Ecosystem

Built for QA engineers, SDETs, and RPA Developers — a complete ecosystem for learning and practicing test automation.

Learning & Courses

Looking to learn Test Automation or Robotic Process Automation (RPA)? Dive into high-quality video tutorials, quizzes, and automation tool courses (like TagUI and Taskt).

Video tutorials for beginners to advanced
Quizzes to test your understanding
Automation tool courses (TagUI, Taskt)
Structured learning paths

Go to uassert.com

Practice Sandbox

Already know the basics and want to practice? Our multi-domain testing playground offers 100+ complex web elements designed to hone your scripts without bot blockers.

1,700+ testable elements with data-testid
52 specialized testing domains
12 real industry applications
No captchas, no bot blockers

How We Got Here

Foundation — 18 core sections

Forms, tables, interactions, banking, e-commerce, checkout and the power tools.

Hardening — accessibility & quality

0 contrast failures, labeled inputs, focus traps, mobile-clean, the Accessibility training section.

The loop — runner, report, playground

In-browser test runner, CI-style report with flake detection, assertion playground, help hub.

Real-world & breadth

WebSocket, auth/sessions, uploads, visual regression, Web-Vitals, i18n/RTL, race lab, chaos, deeper DOM, print, sortable/resizable — 41 sections.

What’s next?

Guided challenges, bug-hunt mode, a CI pipeline visualizer, shareable test links and more.

Ready to put it to the test?

Jump into the sandbox and write your first suite in under a minute — no setup, no sign-up.

Browser-local · All data stays in your browser.

What do you want to test?

Forms & Inputs

Start with a real workflow

Move from action to test

Forms & Inputs

User flows

Login Form

OTP / PIN Input

Credit Card Input

Phone Input

Validation & feedback

Autocomplete / Search

Multi-Select Tags

Text & Validation

Password Strength

Choices & preferences

Checkboxes & Radios

Dropdowns & Select

Toggles & Sliders

Native & file inputs

Date / Time / Color

Number Inputs

File Upload

Data Tables

Inline-Edit Table

Expandable Orders (Master-Detail)

Inventory Status Table

Hierarchical Tree Table

Live Stock Table (updates every 1s)

Table States (Loading / Empty / Data)

User Interactions

Kanban (Drag & Drop)

📋 To Do

🔨 In Progress

👀 Review

✅ Done

Star Rating

Context Menu

Click Events

Keyboard Events

Sortable List

Hover & Focus

Drag & Drop Zone

Scroll & Resize

Tooltips & Popovers

Popover Title

Dynamic Content

Timer

Toasts

Progress Bars

Skeleton Loaders

Spinners & Loaders

Alerts

Modal Dialog

Countdown Timer

Infinite Scroll

Dynamic Elements

Polling Job Status

Loading Button States

Live Activity Feed

Dismissible Banners

Navigation Components

Tabs

Accordion

Media

Image Gallery

Responsive Image

Video

Audio

API Testing Studio

Advanced

Shadow DOM

Clipboard

Storage Lab

Banking & Finance

Transfer Funds

Bill Pay

Recent Transactions

Loan Calculator

Account Statements