[pest-plugin-browser] LaravelHttpServer truncates served JS assets larger than 8 KB (fread instead of stream_get_contents)

[abishekrsrikaanth]

Filed here because issues are disabled on pestphp/pest-plugin-browser. This concerns that package.

What happened

In LaravelHttpServer::asset(), JavaScript assets are read with a single fread() call sized to the file length:

// src/Drivers/LaravelHttpServer.php (v4.3.1, the `.js` branch of asset())
$temporaryContent = fread($file, (int) filesize($filepath));

fread() returns at most one chunk per call (8192 bytes on a stock build), regardless of the requested length. So any served .js file larger than 8 KB is delivered truncated to 8192 bytes.

In practice this hits the bundled application JS (e.g. a Vite app.js), which is almost always well over 8 KB. The browser receives a truncated script and throws:

Uncaught SyntaxError: Unexpected end of input

This is only reached for .js files because that branch buffers the content (to rewrite asset URLs) before streaming it; other assets are streamed directly from the file handle and are unaffected.

Impact

Any page that loads a JS bundle larger than 8 KB fails assertNoJavascriptErrors() (and any behaviour that depends on the bundle executing). The page HTML itself still renders, so assertSee(...) passes — which makes it look like an environment/CI issue rather than truncated JS.

Reproduction

1. Build a front-end bundle larger than 8 KB (e.g. a default Laravel + Vite app.js).
2. Visit any page that loads it in a browser test and call assertNoJavascriptErrors().
3. The assertion fails with Uncaught SyntaxError: Unexpected end of input.

Confirmed by fetching the served asset from within the page: content-length/actual body is 8192 bytes while the file on disk is ~44 KB, and the truncated body fails to parse.

Suggested fix

Read the whole stream instead of relying on a single fread():

$temporaryContent = stream_get_contents($file);

stream_get_contents() drains the handle completely, so the full asset is buffered before the URL rewrite + streaming. This resolves the truncation in our test suite (browser suite went from failing on every JS-loading page to fully green).

Version

pestphp/pest-plugin-browser v4.3.1