test(view): fallthrough expressions / dynamic fallthrough expressions

packages/view/tests/FallthroughAttributesTest.php

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+<?php
+
+namespace Tempest\View\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Tempest\View\Exceptions\ViewComponentPathWasInvalid;
+use Tempest\View\Exceptions\ViewComponentPathWasNotFound;
+use Tempest\View\Renderers\TempestViewRenderer;
+use Tempest\View\ViewCache;
+use Tempest\View\ViewComponent;
+use Tempest\View\ViewConfig;
+
+use function Tempest\view;
+
+final class FallthroughAttributesTest extends TestCase
+{
+    public function test_render(): void
+    {
+        $viewConfig = new ViewConfig()->addViewComponents(
+            __DIR__ . '/Fixtures/x-fallthrough-test.view.php',
+            __DIR__ . '/Fixtures/x-fallthrough-dynamic-test.view.php',
+        );
+
+        $renderer =
+            TempestViewRenderer::make(
+                viewConfig: $viewConfig,
+            );
+
+        $html = $renderer->render(
+            view(__DIR__ . '/Fixtures/fallthrough.view.php'),
+        );
+
+        $this->assertEquals(<<<'HTML'
+        <div class="in-component component-class"></div>
+        <div class="in-component component-class"></div>
+        <div class="component-class" style="display: block;"></div>
+        <div class="component-class" style="display: block;"></div>
+        HTML, $html);
+    }
+}

packages/view/tests/Fixtures/fallthrough.view.php

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+<?php 
+    $componentClass = 'component-class';
+    $componentStyle = 'display: block;';
+?><x-fallthrough-test class="component-class" />
+<x-fallthrough-test :class="$componentClass" />
+<x-fallthrough-dynamic-test c="component-class" s="display: block;" />
+<x-fallthrough-dynamic-test :c="$componentClass" :s="$componentStyle"/>

packages/view/tests/Fixtures/x-fallthrough-dynamic-test.view.php

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+<div :class="$attributes->get('c')" :style="$attributes->get('s')"></div>

packages/view/tests/Fixtures/x-fallthrough-test.view.php

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+<div class="in-component"></div>