Name a meaningful image with alternative text.
HTML: Alt supplies an accessible text alternative describing the image’s purpose.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Example</title>
</head>
<body>
<img src="data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%22120%22%20height%3D%2280%22%3E%3Crect%20width%3D%22120%22%20height%3D%2280%22%20fill%3D%22%232850aa%22/%3E%3C/svg%3E" alt="Blue sample swatch">
</body>
</html>Expected output EXAMPLE
A blue sample swatch loads with an intrinsic width of 120 pixels. Its accessible name is "Blue sample swatch".
Details
Save as example.html and open in a modern browser. The output describes browser behavior verified with DOM and interaction assertions. Alt supplies an accessible text alternative describing the image’s purpose.
Tested on Ubuntu 24.04.5 LTS · · Chromium 141.0.7390.37 · libc6 2.39-0ubuntu8.9; Playwright 1.56.0
Test inputs, results and environment
The exact published code ran in a dedicated Linux test container with prepared inputs. Unprivileged snippet process, external networking disabled, read-only root filesystem, and a fresh temporary working directory. Fixtures and output records are isolated from the application database. Testing covers this example and its stated checks, not every input, operating system, or runtime version. The Linux container shares its host's kernel; this is not a native Windows test.
- Architecture / host kernel
- x86_64 / 6.18.54.1-microsoft-standard-WSL2
- Snippet identity / locale
- uid=65534, gid=65534 (unprivileged) / C.UTF-8
- Interpreter invocation
Chromium: open example.html; execute the published browser assertions- Container image ID
sha256:32dc2d998158b6554c99b73b533f423696a0f3e31e8cbea9db10b5eee9a2fadd- Code SHA-256
c37c7879bfb7eaf1476b2aa0bac21d7d07a10ced36df190105fcade8856bb763- Dependencies
- libc6 2.39-0ubuntu8.9; Playwright 1.56.0
Test input setup
These are the prepared inputs used by the test harness. See Details above for the prerequisites and how to run this example.
# No input files required.
Observed standard output
Expected output describes the rendered page. The standard-output record below is the browser test harness receipt; the additional assertions check the result and interactions.
Name a meaningful image with alternative text: browser checks passed.
Exit code: 0. Standard error: empty. Validation: Shape/content assertions. System-dependent values above are one recorded run.
Additional assertions that passed
Checks recorded by the test harness. Where Python assertions are shown, browser cases use Playwright and simulator cases may inspect pin transitions: result.stdout is captured output, work is the temporary directory, and Path is pathlib.Path. The harness also imports json and csv.
assert await page.get_by_role('img',name='Blue sample swatch').count()==1
assert await page.locator('img').evaluate('(e)=>e.complete && e.naturalWidth===120')