I would like to ask about PHPUnit of Drupal 8 - drupal

Question

I created Block in Drupal 8 with a custom module.
Is it possible to implement this with PHPUnit?
If you can implement it please tell me how.
I want to realize the test with PHPUnit below.
I would be pleased if you could reply just whether it was possible or not.
moduleNameBlock.php
/**
* #file
* create block
*/
namespace Drupal\moduleName\Plugin\Block;
use Drupal\Core\Block\BlockBase;
use Drupal\Core\Url;
/**
*
* Provides a 'testBlock' block.
* #Block(
* id = "test_block",
* admin_label = #Translation("Test"),
* category = #Translation("Menu"),
* )
*/
class moduleNameBlock extends BlockBase {
/**
* {#inheritdoc}
*/
public function build()
{
$build = [];
$url = '';
$nid = '';
$nid = $this->getCurrentUserNode();
if ( !empty($nid) ) {
$url = Url::fromRoute('entity.node.canonical', ['node' => $nid]);
}
$block = [
'#theme' => 'block_theme',
'#url' => $url,
'#nid' => $nid,
'#cache' => [
'max-age' => 0
]
];
$build['test_block'] = $block;
return $build;
}
/**
* The node associated with the user
* #return nid
*/
private function getCurrentUserNode() {
$user_id = \Drupal\user\Entity\User::load(\Drupal::currentUser()->id());
$nid = $user_id->get('field_name')->getValue();
return $nid[0]['target_id'];
}
}

Answer 1

Yes this is possible by writing a PHPUnit Functional test.
In your module directory create the following structure /tests/src/Functional then create a file like ModuleNameBlockTest.php then you can place the block in the setUp function and create tests to test the block.
<?php
namespace Drupal\Tests\my_module_name\Functional;
use Drupal\Tests\BrowserTestBase;
/**
* Class ModuleNameBlockTest.
*
* #package Drupal\Tests\my_module_name\Functional
* #group my_group
*/
class ModuleNameBlockTest extends BrowserTestBase {
/**
* Modules to enable.
*
* #var array
*/
public static $modules = ['block', 'my_module_name'];
/**
* {#inheritdoc}
*/
protected function setUp() {
parent::setUp();
$adminUser = $this->drupalCreateUser(['administer blocks']);
$this->drupalLogin($adminUser);
$this->drupalPlaceBlock('my_block_name');
$this->drupalLogout($adminUser);
}
/**
* Test the block.
*/
public function testMyAwesomeBlock() {
// Your test logic here.
}
}
You can always look into the source code of Drupal for some examples. E.g. UserBlocksTest.php of the core user module.