Run the design guard's smoke test with missingStylesheets(), as Blade resolves

Plan step 41 review: the committed smoke test scanned the package's views
without the stylesheet check, so the claim that the package, showcase and
Workbench pass it through all.css was untested; it now runs it, and
checks the showcase's plain tags do need imports from a foundation-only
entry, so the pass is not vacuous. Doing so exposed that a component class
one test evals leaked into every later check in the process: the shadow
check now guesses the class the way Blade does (Blade::component()
aliases, component namespaces, the application's own root namespace), and
the test gives its class a namespace of its own.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

src/Testing/DesignGuard.php

@@ -3,9 +3,11 @@
 namespace NoNameWeb\LivewireMaterial\Testing;
 
 use Illuminate\Support\Str;
+use Illuminate\View\Compilers\ComponentTagCompiler;
 use NoNameWeb\LivewireMaterial\Support\Layout;
 use NoNameWeb\LivewireMaterial\Support\Stylesheets;
 use NoNameWeb\LivewireMaterial\Support\SvgFile;
+use RuntimeException;
 use SplFileInfo;
 use Symfony\Component\Finder\Finder;
 
@@ -1227,15 +1229,31 @@ class DesignGuard
     }
 
     /**
-     * Whether the application defines its own component of this name — an anonymous
-     * `resources/views/components/<name>.blade.php`, found the way Blade itself falls back to it
-     * (the base view finder's `components.<name>`, which `resource_path('views/components')`
-     * feeds by default), or an `App\View\Components` class. Either wins over this package's
-     * `<x-{$name}>` in Blade's own resolution order.
+     * Whether the application defines its own component of this name, found the way Blade itself
+     * looks before it reaches this package's anonymous path: an alias registered with
+     * `Blade::component()`, a class under the application's `View\\Components` namespace (its own
+     * root namespace, as Blade guesses it), or an anonymous
+     * `resources/views/components/<name>.blade.php` (the base view finder's `components.<name>`).
      */
     protected function shadowedByApplication(string $name): bool
     {
-        return view()->exists('components.'.$name) || class_exists('App\\View\\Components\\'.Str::studly($name));
+        if (view()->exists('components.'.$name)) {
+            return true;
+        }
+
+        $blade = app('blade.compiler');
+        $compiler = new ComponentTagCompiler($blade->getClassComponentAliases(), $blade->getClassComponentNamespaces(), $blade);
+
+        try {
+            $class = $compiler->guessClassName($name);
+        } catch (RuntimeException) {
+            return false; // No application namespace to guess a class in.
+        }
+
+        return isset($blade->getClassComponentAliases()[$name])
+            || $compiler->findClassByComponent($name) !== null
+            || class_exists($class)
+            || class_exists($class.'\\'.Str::afterLast($class, '\\'));
     }
 
     /**

tests/Feature/DesignGuardTest.php

@@ -486,8 +486,12 @@ it('reports a package tag the application shadows with its own anonymous compone
 });
 
 it('reports a package tag the application shadows with its own component class', function () {
-    if (! class_exists('App\View\Components\Card', false)) {
-        eval('namespace App\View\Components; class Card {}');
+    // Under a namespace of its own, which Blade's class guess reads from the application, so the
+    // class cannot shadow `<x-card>` for any later test in this process.
+    (fn () => $this->namespace = 'DesignGuardShadow\\')->call(app());
+
+    if (! class_exists('DesignGuardShadow\View\Components\Card', false)) {
+        eval('namespace DesignGuardShadow\View\Components; class Card {}');
     }
 
     $violations = fixtureRelative(DesignGuard::scan(realpath(GUARD_FIXTURES.'/stylesheets/views/shadow-class.blade.php'))
@@ -539,8 +543,11 @@ it('never reads a Tailwind-shaped word out of running text', function () {
     expect($violations)->toBe([]);
 });
 
-it('passes the package\'s own views', function () {
-    $violations = DesignGuard::scan([__DIR__.'/../../resources/views', __DIR__.'/../../resources/js', __DIR__.'/../../src'])->violations();
+it('passes the package\'s own views, showcase and Workbench, every stylesheet imported through all.css', function () {
+    $root = realpath(__DIR__.'/../..');
+    $paths = [$root.'/resources/views', $root.'/resources/js', $root.'/src', $root.'/workbench/resources'];
 
-    expect($violations)->toBe([]);
+    expect(DesignGuard::scan($paths)->missingStylesheets($root.'/resources/css/all.css')->violations())->toBe([])
+        // …and the stylesheet check is not vacuous there: the showcase's plain tags do need imports.
+        ->and(DesignGuard::scan($root.'/resources/views/showcase')->missingStylesheets(realpath(GUARD_FIXTURES.'/stylesheets/foundation-only.css'))->violations())->not->toBe([]);
 });