livewire-material/tests/Browser/ErrorPagesTest.php

<?php

use Illuminate\Support\Facades\File;
use Illuminate\Support\Facades\Vite;
use Illuminate\Support\Str;

/**
 * The 404 page, reached the way a visitor reaches it: an address nothing answers.
 */
function missingPage(string $colorScheme = 'light')
{
    $page = visit('/nothing-lives-here');
    $page = $colorScheme === 'dark' ? $page->inDarkMode() : $page->inLightMode();

    return $page->waitForEvent('networkidle')
        ->assertScript("document.readyState === 'complete' && document.querySelector('[data-md-error-page]') !== null");
}

/**
 * Whether the element's computed background is the colour a role resolves to on this page.
 */
function paintedIn(string $selector, string $role): string
{
    return <<<JS
        (() => {
            const probe = document.createElement('div');
            probe.style.backgroundColor = 'var(--md-sys-color-{$role})';
            document.body.append(probe);
            const expected = getComputedStyle(probe).backgroundColor;
            probe.remove();

            return expected !== 'rgba(0, 0, 0, 0)' && getComputedStyle(document.querySelector('{$selector}')).backgroundColor === expected;
        })()
        JS;
}

it('draws the 404 page in the scheme, in light and dark', function () {
    missingPage('light')
        ->assertSee('Page not found')
        ->assertVisible('[data-md-error-headline]')
        ->assertScript("document.documentElement.getAttribute('data-theme') === 'light'")
        ->assertScript(paintedIn('body', 'surface'))
        ->assertScript("getComputedStyle(document.querySelector('[data-md-error-shape] svg')).color !== getComputedStyle(document.body).color")
        ->assertNoJavaScriptErrors();

    missingPage('dark')
        ->assertScript("document.documentElement.getAttribute('data-theme') === 'dark'")
        ->assertScript(paintedIn('body', 'surface'))
        ->assertScript("getComputedStyle(document.body).backgroundColor !== 'rgb(253, 247, 254)'");
});

it('fits a 400px screen without scrolling sideways', function () {
    missingPage()
        ->resize(400, 800)
        ->assertVisible('[data-md-error-headline]')
        ->assertScript('document.documentElement.scrollWidth <= window.innerWidth')
        ->assertScript("document.querySelector('[data-md-error-actions] a').getBoundingClientRect().right <= 400");
});

/**
 * Plan step 40: the fallback path, the same server serving the request `LaravelHttpServer` runs
 * in-process, so a config change here reaches it exactly as it reaches a Feature test's client —
 * an empty temporary directory has no `build/manifest.json` and no `hot` file, so `ErrorPage::assets()`
 * throws and returns null (tests/Feature/ErrorPagesTest.php does the same for the HTTP client).
 */
it('draws the button and the shape from the inlined fallback stylesheet, and repaints in dark mode', function () {
    $public = sys_get_temp_dir().'/livewire-material-fallback-'.Str::random(8);
    File::ensureDirectoryExists($public);

    $originalPublicPath = app()->publicPath();
    app()->usePublicPath($public);
    Vite::useHotFile($public.'/hot');

    try {
        missingPage('light')
            ->assertScript("document.querySelector('style[data-md-error-fallback]') !== null")
            ->assertScript("document.querySelector('link[href*=\"/build/\"]') === null")
            // The button: button.css's round, filled shape, not a bare unstyled <a>.
            ->assertScript("getComputedStyle(document.querySelector('[data-md-button]')).borderRadius !== '0px'")
            ->assertScript(paintedIn('[data-md-button][data-md-variant=filled]', 'primary'))
            // The shape: shape.css's sizing and the primary-container tint error-page.css paints its svg with.
            ->assertScript("getComputedStyle(document.querySelector('[data-md-error-shape] svg')).color !== getComputedStyle(document.body).color")
            ->assertScript(paintedIn('body', 'surface'))
            ->assertNoJavaScriptErrors();

        // The [data-theme='dark'] block the fallback also inlines repaints the page, exactly as the
        // built stylesheet does for the test above.
        missingPage('dark')
            ->assertScript("document.documentElement.getAttribute('data-theme') === 'dark'")
            ->assertScript(paintedIn('body', 'surface'))
            ->assertScript("getComputedStyle(document.body).backgroundColor !== 'rgb(253, 247, 254)'");
    } finally {
        app()->usePublicPath($originalPublicPath);
        Vite::useHotFile($originalPublicPath.'/hot');
        File::deleteDirectory($public);
    }
});