installConfig(['system']);
}
/**
* Tests Fiber::suspend() during twig rendering via placeholders.
*/
public function testNestedLazyBuilderPlaceholders(): void {
$render_array = $this->buildRenderArray();
$output_string = (string) \Drupal::service('renderer')->renderRoot($render_array);
$items = [
'Lazy builder content with param1
',
'First Fibers test: param2',
'Second Fibers test: param2',
'Lazy builder content with param3
',
'First Fibers test: param4',
'Second Fibers test: param4',
];
$this->assertStringOrder($items, $output_string);
}
/**
* Asserts the order of an array of strings inside a string.
*
* @param array $items
* The array of strings.
* @param array $haystack
* The string that should contain $items in order.
*
* @todo use a generic assertion once available.
* @see https://www.drupal.org/project/drupal/issues/2817657
*/
protected function assertStringOrder(array $items, string $haystack): void {
$strings = [];
foreach ($items as $item) {
if (($pos = strpos($haystack, $item)) === FALSE) {
$this->fail("Cannot find '$item' in the page");
}
$strings[$pos] = $item;
}
ksort($strings);
$ordered = implode(', ', array_map(function ($item) {
return "'$item'";
}, $items));
$this->assertSame($items, array_values($strings), "Found strings, ordered as: $ordered.");
}
/**
* Builds a render array with placeholdered lazy builder callbacks.
*
* @return array
* The render array with three elements containing lazy builders.
*/
protected function buildRenderArray(): array {
return [
'#type' => 'container',
'element_1' => [
'#lazy_builder' => [static::class . '::lazyBuilderCallback', ['param1']],
'#create_placeholder' => TRUE,
],
'element_2' => [
'#lazy_builder' => [static::class . '::twigFiberSuspendLazyBuilderCallback', ['param2']],
'#create_placeholder' => TRUE,
],
'element_3' => [
'#lazy_builder' => [static::class . '::lazyBuilderCallback', ['param3']],
'#create_placeholder' => TRUE,
],
'element_4' => [
'#lazy_builder' => [static::class . '::twigFiberSuspendLazyBuilderCallback', ['param4']],
'#create_placeholder' => TRUE,
],
];
}
/**
* Lazy builder callback.
*
* @param string $param
* A parameter for the callback.
*
* @return array
* A render array.
*/
#[TrustedCallback]
public static function lazyBuilderCallback(string $param): array {
return [
'#type' => 'container',
'#markup' => 'Lazy builder content with ' . $param,
];
}
/**
* Lazy builder callback with test template.
*
* @param string $param
* A parameter for the callback.
*
* @return array
* A render array containing another lazy builder.
*/
#[TrustedCallback]
public static function twigFiberSuspendLazyBuilderCallback(string $param): array {
return [
'#type' => 'inline_template',
'#template' => '
First {{ fibers_test_function(message) }}
Second {{ fibers_test_function(message) }}
',
'#context' => [
'message' => $param,
],
];
}
}