public function test_get_item_schema() {
    $request  = new WP_REST_Request( 'OPTIONS', self::$rest_api_route . self::$block_name );
    $response = rest_get_server()->dispatch( $request );
    $data     = $response->get_data();

    $this->assertSameSets( array( 'GET', 'POST' ), $data['endpoints'][0]['methods'] );
    $this->assertSameSets(
      array( 'name', 'context', 'attributes', 'post_id' ),
      array_keys( $data['endpoints'][0]['args'] )
    );
    $this->assertSame( 'object', $data['endpoints'][0]['args']['attributes']['type'] );

    $this->assertArrayHasKey( 'schema', $data );
    $this->assertSame( 'rendered-block', $data['schema']['title'] );
    $this->assertSame( 'object', $data['schema']['type'] );
    $this->arrayHasKey( 'rendered', $data['schema']['properties'] );
    $this->arrayHasKey( 'string', $data['schema']['properties']['rendered']['type'] );
    $this->assertSame( array( 'edit' ), $data['schema']['properties']['rendered']['context'] );
  }