fix: preserve deferred WordPress hook lifecycle

packages/runtime-core/src/recipe-builders.ts

@@ -82,7 +82,7 @@ export function buildWordPressPhpunitRecipe(options: WordPressPhpunitRecipeOptio
       wp: options.wordpressVersion ?? DEFAULT_WORDPRESS_VERSION,
       ...(options.phpVersion ? { phpVersion: options.phpVersion } : {}),
       ...(options.wordpressInstallMode ? { wordpressInstallMode: options.wordpressInstallMode } : {}),
-      blueprint: blueprintWithMultisite(options.blueprint ?? { steps: [] }, options.multisite ?? false),
+      blueprint: blueprintWithMultisite(options.blueprint ?? { steps: [] }, (options.multisite ?? false) && options.databaseType !== "mysql"),
       ...(options.preview || options.multisite ? { preview: multisitePreview(options.preview, options.multisite ?? false) } : {}),
       ...(options.extensions?.length ? { extensions: options.extensions } : {}),
       ...(options.backendPackage ? { backendPackage: options.backendPackage } : {}),

packages/runtime-playground/src/php-bootstrap.ts

@@ -21,7 +21,8 @@ ${phpBody(code)}`
 }
 
 export function bootstrapPhpCode(spec: RuntimeCreateSpec, code: string, args: string[], wpCliBridge?: PhpBootstrapBridge, failureDiagnosticFile?: string): string {
-  if (argValue(args, "bootstrap") === "none") {
+  const bootstrapMode = argValue(args, "bootstrap")
+  if (bootstrapMode === "none") {
     return code
   }
 
@@ -36,15 +37,15 @@ ${saveQueriesBootstrapPhp(args)}
 ${runtimeEnvPhp(spec, args)}
 ${secretEnvPhp(spec)}
 ${componentManifestPhp(spec)}
-require_once '/wordpress/wp-load.php';
+${bootstrapMode === "runtime-only" ? "" : "require_once '/wordpress/wp-load.php';"}
 ${failureDiagnosticFile ? phpFailureDiagnosticCompletionPhp() : ""}
-${recipeActivePluginBootstrapPhp(spec, args)}
+${bootstrapMode === "runtime-only" ? "" : recipeActivePluginBootstrapPhp(spec, args)}
 ${wpCliBridge ? `putenv(${JSON.stringify(`WP_CODEBOX_TERMINAL_ACTION_URL=${wpCliBridge.url}`)});
 putenv(${JSON.stringify(`WP_CODEBOX_TERMINAL_ACTION_TOKEN=${wpCliBridge.token}`)});
 ` : ""}
 ${command.body}`
 
-  return failureDiagnosticFile ? phpFailureDiagnosticWrapperPhp(bootstrapped, failureDiagnosticFile) : bootstrapped
+  return failureDiagnosticFile && bootstrapMode !== "runtime-only" ? phpFailureDiagnosticWrapperPhp(bootstrapped, failureDiagnosticFile) : bootstrapped
 }
 
 function phpFailureDiagnosticWrapperPhp(code: string, path: string): string {

packages/runtime-playground/src/phpunit-command-handlers.ts

@@ -537,16 +537,34 @@ function pg_defer_new_wordpress_hook_callbacks(string $hook_name, array $before)
 }
 
 function pg_run_deferred_wordpress_hook_callbacks(array $deferred, array $args = array(), ?string $hook_name = null): void {
-    global $wp_current_filter;
+    global $wp_filter, $wp_current_filter;
     $pushed_hook = false;
+    $original_hook = null;
+    $replay_hook = null;
     if (is_string($hook_name) && $hook_name !== '') {
         if (!is_array($wp_current_filter)) {
             $wp_current_filter = array();
         }
         $wp_current_filter[] = $hook_name;
         $pushed_hook = true;
+        $original_hook = $wp_filter[$hook_name] ?? null;
+        $replay_hook = new WP_Hook();
+        $wp_filter[$hook_name] = $replay_hook;
+        foreach ($deferred as $entry) {
+            $callback = $entry['callback'] ?? null;
+            if (!is_array($callback) || !isset($callback['function'])) {
+                continue;
+            }
+            $priority = isset($entry['priority']) ? (int) $entry['priority'] : 10;
+            $accepted_args = isset($callback['accepted_args']) ? (int) $callback['accepted_args'] : count($args);
+            add_filter($hook_name, $callback['function'], $priority, $accepted_args);
+        }
     }
     try {
+        if ($replay_hook instanceof WP_Hook) {
+            $replay_hook->do_action($args);
+            return;
+        }
         foreach ($deferred as $entry) {
             $callback = $entry['callback'] ?? null;
             if (!is_array($callback) || !isset($callback['function'])) {
@@ -556,6 +574,21 @@ function pg_run_deferred_wordpress_hook_callbacks(array $deferred, array $args =
             call_user_func_array($callback['function'], array_slice($args, 0, $accepted_args));
         }
     } finally {
+        if ($replay_hook instanceof WP_Hook && is_string($hook_name)) {
+            $retained_callbacks = $replay_hook->callbacks;
+            if ($original_hook instanceof WP_Hook) {
+                $wp_filter[$hook_name] = $original_hook;
+            } else {
+                unset($wp_filter[$hook_name]);
+            }
+            foreach ($retained_callbacks as $priority => $callbacks) {
+                foreach ($callbacks as $callback) {
+                    if (isset($callback['function'])) {
+                        add_filter($hook_name, $callback['function'], (int) $priority, (int) ($callback['accepted_args'] ?? 0));
+                    }
+                }
+            }
+        }
         if ($pushed_hook) {
             array_pop($wp_current_filter);
         }
@@ -1080,7 +1113,7 @@ if (!is_array($wp_config_defines)) {
     $wp_config_defines = array();
 }
 if ($multisite) {
-    $wp_config_defines += array(
+    $multisite_defines = array(
         'WP_TESTS_MULTISITE' => true,
         'MULTISITE' => true,
         'SUBDOMAIN_INSTALL' => false,
@@ -1089,6 +1122,12 @@ if ($multisite) {
         'SITE_ID_CURRENT_SITE' => 1,
         'BLOG_ID_CURRENT_SITE' => 1,
     );
+    $wp_config_defines += $multisite_defines;
+    foreach ($multisite_defines as $name => $value) {
+        if (!defined($name)) {
+            define($name, $value);
+        }
+    }
     putenv('WP_MULTISITE=1');
     $_ENV['WP_MULTISITE'] = '1';
 }
@@ -1127,8 +1166,10 @@ tests_add_filter('muplugins_loaded', function () use ($plugin_slug, $plugin_path
 pg_run_install_stage(array('config_path' => $config_path, 'tests_dir' => $tests_dir, 'multisite' => $multisite));
 pg_remove_new_wordpress_hook_callbacks('shutdown', $pre_component_shutdown_callbacks);
 $pre_dependency_plugins_loaded_callbacks = pg_snapshot_wordpress_hook_callbacks('plugins_loaded');
+$pre_dependency_init_callbacks = pg_snapshot_wordpress_hook_callbacks('init');
 $loaded_dep_files = pg_run_load_deps_stage(array('dep_mounts' => $dep_mounts));
 $deferred_dependency_plugins_loaded_callbacks = pg_defer_new_wordpress_hook_callbacks('plugins_loaded', $pre_dependency_plugins_loaded_callbacks);
+$deferred_dependency_init_callbacks = pg_defer_new_wordpress_hook_callbacks('init', $pre_dependency_init_callbacks);
 $activation_files = $loaded_dep_files;
 if ($loaded_component_file !== null) {
     $activation_files[] = $loaded_component_file;
@@ -1140,7 +1181,7 @@ $reopened_ability_categories_init = pg_reopen_wordpress_action('wp_abilities_api
 $reopened_ability_init = pg_reopen_wordpress_action('wp_abilities_api_init');
 pg_run_deferred_wordpress_hook_callbacks($deferred_install_plugins_loaded_callbacks, array(), 'plugins_loaded');
 pg_run_deferred_wordpress_hook_callbacks($deferred_dependency_plugins_loaded_callbacks, array(), 'plugins_loaded');
-$deferred_install_init_callbacks = array_merge($deferred_install_init_callbacks, pg_defer_new_wordpress_hook_callbacks('init', $pre_replayed_plugins_loaded_init_callbacks));
+$deferred_install_init_callbacks = array_merge($deferred_install_init_callbacks, $deferred_dependency_init_callbacks, pg_defer_new_wordpress_hook_callbacks('init', $pre_replayed_plugins_loaded_init_callbacks));
 usort($deferred_install_init_callbacks, static function (array $left, array $right): int {
     return ($left['priority'] ?? 10) <=> ($right['priority'] ?? 10);
 });

packages/runtime-playground/src/wordpress-command-runners.ts

@@ -959,7 +959,8 @@ export async function runPhpunitCommand({
   }
   let response: PlaygroundRunResponse
   try {
-    response = await runPlaygroundCommand("wordpress.phpunit", server, { code: bootstrapPhpCode(runtimeSpec, code, args, undefined, resultFile) })
+    const bootstrapArgs = explicitCode ? args : [...args, "bootstrap=runtime-only"]
+    response = await runPlaygroundCommand("wordpress.phpunit", server, { code: bootstrapPhpCode(runtimeSpec, code, bootstrapArgs, undefined, resultFile) })
   } catch (error) {
     await persistPluginPhpunitResult(server, resultFile, artifactRoot, processIdentity)
     await persistVfsDiagnosticFileToHost(server, resultFile, diagnosticHostFile, mounts)

tests/disposable-mysql-mysqli.integration.test.ts

@@ -146,6 +146,63 @@ require_once ABSPATH . 'wp-settings.php';
     assert.deepEqual(aggregate.counts, { total: 2, succeeded: 2, failed: 0, timedOut: 0, cancelled: 0 })
     assert.deepEqual(aggregate.entries.map((entry: { artifactNamespace: string }) => entry.artifactNamespace), ["phpunit/one", "phpunit/two"])
     assert.deepEqual(aggregate.entries.map((entry: { inputIndex: number }) => entry.inputIndex), [0, 1])
+
+    const multisitePlugin = join(directory, "managed-multisite-fixture")
+    const multisiteRecipePath = join(directory, "managed-multisite-recipe.json")
+    const multisiteArtifacts = join(directory, "managed-multisite-artifacts")
+    await mkdir(join(multisitePlugin, "tests"), { recursive: true })
+    await writeFile(join(multisitePlugin, "managed-multisite-fixture.php"), `<?php
+/** Plugin Name: Managed Multisite Fixture */
+add_action('init', static function (): void {
+    update_option('wp_codebox_parent_init_ran', 1);
+    add_action('init', static function (): void {
+        update_option('wp_codebox_nested_init_ran', 1);
+        do_action('wp_codebox_nested_init_replayed');
+    }, 15);
+}, 0);
+`)
+    await writeFile(join(multisitePlugin, "phpunit.xml.dist"), "<?xml version=\"1.0\"?><phpunit><testsuites><testsuite name=\"managed-multisite\"><directory>tests</directory></testsuite></testsuites></phpunit>\n")
+    await writeFile(join(multisitePlugin, "tests", "ManagedMultisiteTest.php"), `<?php
+final class ManagedMultisiteTest extends WP_UnitTestCase {
+    public function test_external_mysql_preserves_multisite_blog_switching(): void {
+        $this->assertTrue(is_multisite());
+        $original = get_current_blog_id();
+        $blog_id = self::factory()->blog->create();
+        switch_to_blog($blog_id);
+        $this->assertSame($blog_id, get_current_blog_id());
+        $this->assertTrue(ms_is_switched());
+        restore_current_blog();
+        $this->assertSame($original, get_current_blog_id());
+        $this->assertFalse(ms_is_switched());
+    }
+
+    public function test_external_mysql_replays_wordpress_lifecycle_in_order(): void {
+        $this->assertGreaterThan(0, did_action('init'));
+        $this->assertSame(1, (int) get_option('wp_codebox_parent_init_ran'));
+        $this->assertSame(1, (int) get_option('wp_codebox_nested_init_ran'));
+        $this->assertSame(1, did_action('wp_codebox_nested_init_replayed'));
+    }
+
+    public function test_runtime_uses_real_mysql(): void {
+        global $wpdb;
+        $this->assertInstanceOf(mysqli::class, $wpdb->dbh);
+        $this->assertSame('1', (string) $wpdb->get_var("SELECT JSON_VALID('{\\"valid\\":true}')"));
+    }
+}
+`)
+    const multisiteRecipe = buildWordPressPhpunitRecipe({
+      pluginSlug: "managed-multisite-fixture",
+      phpVersion: "8.3",
+      databaseType: "mysql",
+      multisite: true,
+      pluginSource: multisitePlugin,
+      dependencyMounts: ["/wordpress/wp-content/plugins/managed-multisite-fixture"],
+      mounts: [{ source: join(harness, "vendor"), target: "/wp-codebox-vendor", mode: "readonly" }],
+    })
+    await writeFile(multisiteRecipePath, `${JSON.stringify(multisiteRecipe)}\n`)
+    const multisiteResult = await runRecipe({ recipePath: multisiteRecipePath, artifactsDirectory: multisiteArtifacts, previewHoldBlocking: false, previewLeaseRequested: false, previewLeaseChild: false, timeoutMs: 300_000, json: true, summary: false, dryRun: false })
+    const multisiteFailure = multisiteResult as typeof multisiteResult & { error?: unknown }
+    assert.equal(multisiteResult.success, true, JSON.stringify({ error: multisiteFailure.error, executions: multisiteResult.executions }))
     console.log("disposable MySQL and MariaDB mysqli E2E passed")
   } finally {
     await rm(directory, { recursive: true, force: true })

tests/phpunit-project-autoload.test.ts

@@ -65,6 +65,63 @@ function phpString(value: string): string {
   return `'${value.replace(/\\/g, "\\\\").replace(/'/g, "\\'")}'`
 }
 
+function assertDeferredHookReplayUsesWordPressLifecycle(source: string): void {
+  const tempDir = mkdtempSync(join(tmpdir(), "wp-codebox-deferred-hook-"))
+  const scriptPath = join(tempDir, "assert-deferred-hook.php")
+  writeFileSync(scriptPath, `<?php
+class WP_Hook {
+    public array $callbacks = array();
+    public function add_filter($hook, $callback, $priority, $accepted_args): void {
+        $id = is_string($callback) ? $callback : spl_object_hash($callback);
+        $this->callbacks[$priority][$id] = array('function' => $callback, 'accepted_args' => $accepted_args);
+    }
+    public function do_action($args): void {
+        $completed = array();
+        while (true) {
+            ksort($this->callbacks);
+            $next = null;
+            foreach ($this->callbacks as $priority => $callbacks) {
+                foreach ($callbacks as $id => $callback) {
+                    $key = $priority . ':' . $id;
+                    if (!isset($completed[$key])) {
+                        $next = array($key, $callback);
+                        break 2;
+                    }
+                }
+            }
+            if ($next === null) return;
+            $completed[$next[0]] = true;
+            call_user_func_array($next[1]['function'], array_slice($args, 0, $next[1]['accepted_args']));
+        }
+    }
+}
+function add_filter($hook, $callback, $priority = 10, $accepted_args = 1): bool {
+    global $wp_filter;
+    if (!isset($wp_filter[$hook])) $wp_filter[$hook] = new WP_Hook();
+    $wp_filter[$hook]->add_filter($hook, $callback, $priority, $accepted_args);
+    return true;
+}
+function add_action($hook, $callback, $priority = 10, $accepted_args = 1): bool {
+    return add_filter($hook, $callback, $priority, $accepted_args);
+}
+${extractPhpFunction(source, "pg_run_deferred_wordpress_hook_callbacks")}
+$events = array();
+$wp_current_filter = array();
+$wp_filter = array('init' => new WP_Hook());
+add_action('init', function() use (&$events) { $events[] = 'core-must-not-replay'; }, 5, 0);
+$early = function() use (&$events) {
+    $events[] = 'early';
+    add_action('init', function() use (&$events) { $events[] = 'late'; }, 15, 0);
+};
+pg_run_deferred_wordpress_hook_callbacks(array(array('priority' => 0, 'callback' => array('function' => $early, 'accepted_args' => 0))), array(), 'init');
+if ($events !== array('early', 'late')) throw new RuntimeException('deferred init order was not faithful: ' . json_encode($events));
+if (count($wp_filter['init']->callbacks, COUNT_RECURSIVE) < 6) throw new RuntimeException('replayed callbacks were not retained');
+if ($wp_current_filter !== array()) throw new RuntimeException('current filter stack leaked');
+echo "ok\n";
+`)
+  assert.equal(execFileSync("php", [scriptPath], { encoding: "utf8" }), "ok\n")
+}
+
 function assertPhpunitConfigurationAndDiscoveryFailures(source: string, functionName: string, discoveryFunctionName: string, logFunctionName: string, supportsImplicitFallback: boolean): void {
   const tempDir = mkdtempSync(join(tmpdir(), "wp-codebox-phpunit-config-"))
   const malformedXml = join(tempDir, "phpunit.xml.dist")
@@ -191,8 +248,7 @@ pg_run_project_bootstrap_stage(array('project_bootstrap' => '', 'phpunit_xml' =>
 
 function decodedBootstrapWrapper(source: string): string {
   const encoded = source.match(/base64_decode\("([A-Za-z0-9+/=]+)"\)/)?.[1]
-  assert.ok(encoded, "PHPUnit payload must execute inside the bootstrap diagnostic wrapper")
-  return Buffer.from(encoded, "base64").toString("utf8")
+  return encoded ? Buffer.from(encoded, "base64").toString("utf8") : source
 }
 
 function assertSelectedTestFileResolution(source: string): void {
@@ -568,7 +624,7 @@ const decodedCanonicalHarnessCode = decodedBootstrapWrapper(capturedCanonicalHar
 assert.ok(decodedCanonicalHarnessCode.includes('$autoload_file = "/tmp/wp-codebox-inputs/0-wp-codebox-vendor-73845ca47d2f/autoload.php";'))
 assert.ok(decodedCanonicalHarnessCode.includes('$autoload_file_role = "harness";'))
 assert.ok(decodedCanonicalHarnessCode.includes('putenv("TC_MYSQL_PORT=3306");'), "runtime service environment is passed to the PHP executed by wordpress.phpunit")
-assert.ok(decodedCanonicalHarnessCode.indexOf('putenv("TC_MYSQL_PORT=3306");') < decodedCanonicalHarnessCode.indexOf("require_once '/wordpress/wp-load.php';"), "runtime environment is available to project bootstrap code")
+assert.ok(!decodedCanonicalHarnessCode.includes("require_once '/wordpress/wp-load.php';"), "PHPUnit must own WordPress bootstrap so managed multisite constants are established first")
 
 let capturedExplicitCode = ""
 await runPhpunitCommand({
@@ -663,10 +719,13 @@ const managedModeCode = phpunitRunCode({
   databaseType: "sqlite",
 })
 
+assertDeferredHookReplayUsesWordPressLifecycle(managedModeCode)
+
 assert.ok(managedModeCode.includes("configured PHPUnit harness autoload file is not readable"))
 assert.ok(managedModeCode.includes("define('DB_NAME', ':memory:');"), "default managed PHPUnit remains on SQLite")
 assert.ok(managedModeCode.includes("'cacheResult' => false"))
 assert.ok(managedModeCode.includes("global $argv, $pg_stage_output_buffering, $wp_rewrite;"), "managed WordPress installation must expose the rewrite global required by multisite setup")
+assert.ok(managedModeCode.includes("foreach ($multisite_defines as $name => $value)"), "managed multisite must establish network constants before the WordPress test installer runs")
 assert.ok(managedModeCode.includes('$dep_mounts = "/wordpress/wp-content/plugins/demo-plugin\\n/wordpress/wp-content/plugins/dependency";'), "dependency mounts must be newline-delimited for the generated PHP runner")
 const installStageIndex = managedModeCode.indexOf("pg_run_install_stage(array(")
 const dependencyLoadStageIndex = managedModeCode.indexOf("$loaded_dep_files = pg_run_load_deps_stage", installStageIndex)
@@ -711,6 +770,14 @@ assert.deepEqual((multisiteRecipe.runtime.blueprint as { steps: unknown[] }).ste
 assert.equal(multisiteRecipe.runtime.preview?.siteUrl, "http://localhost", "multisite PHPUnit recipes need a canonical site URL without the dynamic Playground port")
 assert.ok(multisiteRecipe.workflow.steps[0].args.includes("multisite=1"))
 
+const externalMysqlMultisiteRecipe = buildWordPressPhpunitRecipe({
+  pluginSlug: "network-plugin",
+  databaseType: "mysql",
+  multisite: true,
+})
+assert.deepEqual((externalMysqlMultisiteRecipe.runtime.blueprint as { steps: unknown[] }).steps, [], "external MySQL must boot single-site until the managed PHPUnit installer creates network tables")
+assert.ok(externalMysqlMultisiteRecipe.workflow.steps[0].args.includes("multisite=1"), "managed PHPUnit still receives the declared multisite contract")
+
 const phpunitCacheAllocator = extractPhpFunction(managedModeCode, "wp_codebox_phpunit_args_private_cache_result_file")
 const phpunitArgsFunction = extractPhpFunction(managedModeCode, "wp_codebox_phpunit_args")
 const phpunitArgsProbe = join(mkdtempSync(join(tmpdir(), "wp-codebox-phpunit-cache-args-")), "probe.php")