Register adapters during Microsub initialization

Adds an 'adapters_registered' flag to prevent duplicate adapter registration and ensures adapters are registered when Microsub is initialized. Updates the REST controller test to verify that core channels are returned, reflecting the new adapter registration behavior.

Author: pfefferle

includes/class-microsub.php

@@ -28,6 +28,13 @@ class Microsub {
 	 */
 	private $initialized = false;
 
+	/**
+	 * Whether adapters have been registered.
+	 *
+	 * @var bool
+	 */
+	private $adapters_registered = false;
+
 	/**
 	 * Get the instance of the class.
 	 *
@@ -57,6 +64,7 @@ public function init() {
 		}
 
 		$this->register_hooks();
+		$this->register_adapters();
 
 		$this->initialized = true;
 	}
@@ -89,6 +97,12 @@ public function register_hooks() {
 	 * Register built-in adapters.
 	 */
 	public function register_adapters() {
+		if ( $this->adapters_registered ) {
+			return;
+		}
+
+		$this->adapters_registered = true;
+
 		// Register WordPress core feeds adapter.
 		$adapter = new Adapters\WordPress();
 		$adapter->register();

tests/phpunit/includes/class-test-rest-controller.php

@@ -73,15 +73,22 @@ public function test_register_routes() {
 	 *
 	 * @covers ::get_channels
 	 */
-	public function test_get_channels_without_adapter() {
+	public function test_get_channels_returns_core_channels() {
 		wp_set_current_user( $this->user_id );
 
 		$request = new WP_REST_Request( 'GET', '/microsub/1.0/endpoint' );
 		$request->set_param( 'action', 'channels' );
 
 		$response = $this->server->dispatch( $request );
+		$data     = $response->get_data();
 
-		$this->assertEquals( 501, $response->get_status() );
+		$this->assertEquals( 200, $response->get_status() );
+		$this->assertArrayHasKey( 'channels', $data );
+		$this->assertNotEmpty( $data['channels'] );
+		$this->assertTrue(
+			in_array( 'wp-dashboard', wp_list_pluck( $data['channels'], 'uid' ), true ),
+			'Expected WordPress core adapter to add wp-dashboard channel'
+		);
 	}
 
 	/**