Add PHPUnit test suite with 64 unit tests (v1.1.1)

PHPUnit 11 + Brain\Monkey for WordPress function mocking. Tests cover
BlockRenderer (28), WidgetRenderer (9), NavWalker (14), and
TemplateController (12). Includes functional WP_HTML_Tag_Processor stub,
CI test job between lint and build-release, prebuild hook gating npm
build on passing tests, and release package exclusions for test files.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/Unit/Block/WidgetRendererTest.php

@@ -0,0 +1,173 @@
+<?php
+
+declare(strict_types=1);
+
+namespace WPBootstrap\Tests\Unit\Block;
+
+use PHPUnit\Framework\TestCase;
+use Brain\Monkey;
+use Brain\Monkey\Functions;
+use WPBootstrap\Block\WidgetRenderer;
+
+class WidgetRendererTest extends TestCase
+{
+    private WidgetRenderer $renderer;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        Monkey\setUp();
+
+        // Skip constructor filter registration.
+        Functions\when('is_admin')->justReturn(true);
+        Functions\when('wp_doing_ajax')->justReturn(false);
+
+        $this->renderer = new WidgetRenderer();
+    }
+
+    protected function tearDown(): void
+    {
+        Monkey\tearDown();
+        parent::tearDown();
+    }
+
+    // ── wrapWidgetInCard ────────────────────────────────────────
+
+    public function testWrapWidgetInCardSetsCardStructure(): void
+    {
+        Functions\when('esc_attr')->returnArg();
+
+        $params = $this->makeParams('block-2', 'widget mb-4 widget_block');
+        $result = $this->renderer->wrapWidgetInCard($params);
+
+        $this->assertStringContainsString('card', $result[0]['before_widget']);
+        $this->assertStringContainsString('card-body', $result[0]['before_widget']);
+        $this->assertSame('</div></div>', $result[0]['after_widget']);
+    }
+
+    public function testWrapWidgetInCardSetsCardTitle(): void
+    {
+        Functions\when('esc_attr')->returnArg();
+
+        $params = $this->makeParams('block-3', 'widget mb-4 widget_block');
+        $result = $this->renderer->wrapWidgetInCard($params);
+
+        $this->assertStringContainsString('<h4', $result[0]['before_title']);
+        $this->assertStringContainsString('card-title', $result[0]['before_title']);
+        $this->assertSame('</h4>', $result[0]['after_title']);
+    }
+
+    public function testWrapWidgetInCardPreservesWidgetId(): void
+    {
+        Functions\when('esc_attr')->returnArg();
+
+        $params = $this->makeParams('search-1', 'widget mb-4 widget_search');
+        $result = $this->renderer->wrapWidgetInCard($params);
+
+        $this->assertStringContainsString('id="search-1"', $result[0]['before_widget']);
+    }
+
+    public function testWrapWidgetInCardPreservesWidgetTypeClasses(): void
+    {
+        Functions\when('esc_attr')->returnArg();
+
+        $params = $this->makeParams('block-5', 'widget mb-4 widget_block wp-block-heading');
+        $result = $this->renderer->wrapWidgetInCard($params);
+
+        // widget_block and wp-block-heading are kept; widget and mb-4 are removed.
+        $this->assertStringContainsString('widget_block', $result[0]['before_widget']);
+        $this->assertStringContainsString('wp-block-heading', $result[0]['before_widget']);
+    }
+
+    public function testWrapWidgetInCardFiltersGenericClasses(): void
+    {
+        Functions\when('esc_attr')->returnArg();
+
+        $params = $this->makeParams('block-2', 'widget mb-4 widget_block');
+        $result = $this->renderer->wrapWidgetInCard($params);
+
+        // The card wrapper adds its own "widget" class, but the extracted
+        // classes should not include the generic "widget" or "mb-4".
+        // Count occurrences: "card mb-3 widget " + "widget_block" should have exactly one "widget".
+        preg_match_all('/\bwidget\b/', $result[0]['before_widget'], $matches);
+        $this->assertCount(1, $matches[0], 'Generic "widget" class should appear once (from card wrapper), not duplicated');
+    }
+
+    public function testWrapWidgetInCardWithNoExistingClasses(): void
+    {
+        Functions\when('esc_attr')->returnArg();
+
+        $params = [
+            [
+                'widget_id'     => 'text-1',
+                'before_widget' => '<div id="text-1">',
+                'after_widget'  => '</div>',
+                'before_title'  => '<h3>',
+                'after_title'   => '</h3>',
+            ],
+        ];
+
+        $result = $this->renderer->wrapWidgetInCard($params);
+
+        $this->assertStringContainsString('card', $result[0]['before_widget']);
+        $this->assertStringContainsString('id="text-1"', $result[0]['before_widget']);
+    }
+
+    // ── processBlockWidgetContent ───────────────────────────────
+
+    public function testProcessBlockWidgetContentReplacesH2WithH4(): void
+    {
+        $content = '<h2 class="wp-block-heading">Categories</h2><ul><li>Cat A</li></ul>';
+        $widget  = new \WP_Widget();
+
+        $result = $this->renderer->processBlockWidgetContent($content, [], $widget);
+
+        $this->assertStringContainsString('<h4 class="wp-block-heading">', $result);
+        $this->assertStringContainsString('</h4>', $result);
+        $this->assertStringNotContainsString('<h2', $result);
+        $this->assertStringNotContainsString('</h2>', $result);
+    }
+
+    public function testProcessBlockWidgetContentPreservesOtherH2(): void
+    {
+        $content = '<h2 class="custom-heading">Keep me</h2>';
+        $widget  = new \WP_Widget();
+
+        $result = $this->renderer->processBlockWidgetContent($content, [], $widget);
+
+        // h2 without wp-block-heading class should remain.
+        $this->assertStringContainsString('<h2 class="custom-heading">', $result);
+    }
+
+    public function testProcessBlockWidgetContentEmptyReturnsEmpty(): void
+    {
+        $widget = new \WP_Widget();
+        $this->assertSame('', $this->renderer->processBlockWidgetContent('', [], $widget));
+    }
+
+    public function testProcessBlockWidgetContentMultipleH2(): void
+    {
+        $content = '<h2 class="wp-block-heading">First</h2><p>Text</p><h2 class="wp-block-heading">Second</h2>';
+        $widget  = new \WP_Widget();
+
+        $result = $this->renderer->processBlockWidgetContent($content, [], $widget);
+
+        $this->assertSame(0, substr_count($result, '<h2'));
+        $this->assertSame(2, substr_count($result, '<h4'));
+    }
+
+    // ── helpers ─────────────────────────────────────────────────
+
+    private function makeParams(string $widgetId, string $classes): array
+    {
+        return [
+            [
+                'widget_id'     => $widgetId,
+                'before_widget' => sprintf('<div id="%s" class="%s">', $widgetId, $classes),
+                'after_widget'  => '</div>',
+                'before_title'  => '<h3 class="sidebar-heading">',
+                'after_title'   => '</h3>',
+            ],
+        ];
+    }
+}