Register 'lock' attribute for every block on the server

.env

@@ -28,7 +28,7 @@ LOCAL_PHP_MEMCACHED=false
 #
 # Supported values are `mysql` and `mariadb`.
 ##
-LOCAL_DB_TYPE=mysql
+LOCAL_DB_TYPE=mariadb
 
 ##
 # The database version to use.
@@ -38,7 +38,7 @@ LOCAL_DB_TYPE=mysql
 # When using `mysql`, see https://hub.docker.com/_/mysql/ for valid versions.
 # When using `mariadb`, see https://hub.docker.com/_/mariadb for valid versions.
 ##
-LOCAL_DB_VERSION=5.7
+LOCAL_DB_VERSION=10
 
 # The debug settings to add to `wp-config.php`.
 LOCAL_WP_DEBUG=true

src/wp-includes/class-wp-block-type.php

@@ -204,6 +204,16 @@ class WP_Block_Type {
 	 */
 	public $style = null;
 
+	/**
+	 * Attributes supported by every block.
+	 *
+	 * @since 6.0.0
+	 * @var array
+	 */
+	const CORE_ATTRIBUTES = array(
+		'lock' => array( 'type' => 'object' ),
+	);
+
 	/**
 	 * Constructor.
 	 *
@@ -368,6 +378,18 @@ public function set_props( $args ) {
 		foreach ( $args as $property_name => $property_value ) {
 			$this->$property_name = $property_value;
 		}
+
+		// Setup attributes if needed.
+		if ( ! $this->attributes ) {
+			$this->attributes = array();
+		}
+
+		// Register core attributes.
+		foreach ( static::CORE_ATTRIBUTES as $attr_key => $attr_schema ) {
+			if ( ! array_key_exists( $attr_key, $this->attributes ) ) {
+				$this->attributes[ $attr_key ] = $attr_schema;
+			}
+		}
 	}
 
 	/**

tests/phpunit/tests/blocks/wpBlockType.php

@@ -84,6 +84,38 @@ public function test_set_props() {
 		$this->assertSame( $args['foo'], $block_type->foo );
 	}
 
+	public function test_core_attributes() {
+		$block_type = new WP_Block_Type( 'core/fake', array() );
+
+		$this->assertEquals(
+			array(
+				'lock' => array( 'type' => 'object' ),
+			),
+			$block_type->attributes
+		);
+	}
+
+	public function test_core_attributes_matches_custom() {
+		$block_type = new WP_Block_Type(
+			'core/fake',
+			array(
+				'attributes' => array(
+					'lock' => array(
+						'type' => 'string',
+					),
+				),
+			)
+		);
+
+		// Backward compatibility: Don't override attributes with the same name.
+		$this->assertEquals(
+			array(
+				'lock' => array( 'type' => 'string' ),
+			),
+			$block_type->attributes
+		);
+	}
+
 	/**
 	 * @ticket 45097
 	 */