test(update-checker): wp-plugin-info.json validity + version/download_url invariants

tests/UpdateCheckerIntegrationTest.php

@@ -7,6 +7,8 @@ final class UpdateCheckerIntegrationTest extends Cf7stgTestCase
 {
     private const PLUGIN_ROOT = __DIR__ . '/..';
     private const PUC_LOADER = self::PLUGIN_ROOT . '/includes/lib/plugin-update-checker/plugin-update-checker.php';
+    private const WP_PLUGIN_INFO_JSON = self::PLUGIN_ROOT . '/wp-plugin-info.json';
+    private const PLUGIN_MAIN_FILE = self::PLUGIN_ROOT . '/cf7-spam-to-telegram.php';
 
     public function test_puc_loader_file_exists(): void
     {
@@ -21,4 +23,45 @@ final class UpdateCheckerIntegrationTest extends Cf7stgTestCase
             'PucFactory must be loadable after requiring the PUC loader'
         );
     }
+
+    public function test_wp_plugin_info_json_is_valid(): void
+    {
+        self::assertFileExists(self::WP_PLUGIN_INFO_JSON);
+        $data = json_decode(file_get_contents(self::WP_PLUGIN_INFO_JSON), true);
+        self::assertIsArray($data, 'wp-plugin-info.json must be valid JSON');
+        foreach (['name', 'slug', 'version', 'download_url', 'sections'] as $required) {
+            self::assertArrayHasKey($required, $data, "missing required key: $required");
+        }
+        self::assertSame('cf7-spam-to-telegram', $data['slug']);
+        self::assertIsArray($data['sections']);
+        self::assertArrayHasKey('description', $data['sections']);
+        self::assertArrayHasKey('changelog', $data['sections']);
+    }
+
+    public function test_wp_plugin_info_json_version_matches_plugin_constant(): void
+    {
+        $data = json_decode(file_get_contents(self::WP_PLUGIN_INFO_JSON), true);
+        $jsonVersion = $data['version'];
+
+        $phpSource = file_get_contents(self::PLUGIN_MAIN_FILE);
+        preg_match("/define\\('CF7STG_VERSION',\\s*'([^']+)'\\)/", $phpSource, $m);
+        self::assertNotEmpty($m[1] ?? null, 'CF7STG_VERSION constant must be defined in plugin main file');
+
+        self::assertSame(
+            $m[1],
+            $jsonVersion,
+            'wp-plugin-info.json::version must match CF7STG_VERSION in cf7-spam-to-telegram.php'
+        );
+    }
+
+    public function test_wp_plugin_info_json_download_url_contains_expected_asset_name(): void
+    {
+        $data = json_decode(file_get_contents(self::WP_PLUGIN_INFO_JSON), true);
+        $expectedAssetName = 'cf7-spam-to-telegram-' . $data['version'] . '.zip';
+        self::assertStringContainsString(
+            $expectedAssetName,
+            $data['download_url'],
+            "download_url must contain expected asset name $expectedAssetName"
+        );
+    }
 }