Make PhpstanDrupalDrushCommandsTest verify written config

Author: mglaman

tests/fixtures/config/phpstan-drupal-includes.neon

@@ -0,0 +1,4 @@
+includes:
+	- ../../../extension.neon
+	- ../../../rules.neon
+	- ../../../vendor/phpstan/phpstan-deprecation-rules/rules.neon

tests/fixtures/config/phpunit-drupal-phpstan.neon

@@ -14,6 +14,4 @@ parameters:
 			content_entity_using_default_storage:
 				class: Drupal\phpstan_fixtures\Entity\ContentEntityUsingDefaultStorage
 includes:
-	- ../../../extension.neon
-	- ../../../rules.neon
-	- ../../../vendor/phpstan/phpstan-deprecation-rules/rules.neon
+	- phpstan-drupal-includes.neon

tests/src/Drush/Commands/PhpstanDrupalDrushCommandsTest.php

@@ -8,31 +8,33 @@
 use Drupal\node\Entity\Node;
 use Drupal\node\NodeStorage;
 use mglaman\PHPStanDrupal\Drush\Commands\PhpstanDrupalDrushCommands;
-use PHPUnit\Framework\TestCase;
+use PHPStan\Testing\PHPStanTestCase;
 use Symfony\Component\Console\Input\ArrayInput;
 use Symfony\Component\Console\Output\BufferedOutput;
 
-final class PhpstanDrupalDrushCommandsTest extends TestCase
+final class PhpstanDrupalDrushCommandsTest extends PHPStanTestCase
 {
+    private static string $tmpDir = '';
 
-    public function testCreateNeon(): void
+    protected function setUp(): void
     {
-        $container = new ContainerBuilder();
-
-        $etmMock = $this->createStub(EntityTypeManagerInterface::class);
+        parent::setUp();
+        $tmpDir = \sys_get_temp_dir() . '/phpstan-drupal-tests';
+        if (!@\mkdir($tmpDir, 0777) && !\is_dir($tmpDir)) {
+            self::fail(\sprintf('Cannot create temp directory %s', $tmpDir));
+        }
+        self::$tmpDir = $tmpDir;
+    }
 
-        $etdMock = $this->createStub(EntityTypeInterface::class);
-        $etdMock->method('id')->willReturn('node');
-        /** @phpstan-ignore-next-line */
-        $etdMock->method('getClass')->willReturn(Node::class);
-        /** @phpstan-ignore-next-line */
-        $etdMock->method('getStorageClass')->willReturn(NodeStorage::class);
+    protected function tearDown(): void
+    {
+        parent::tearDown();
+        @unlink(self::$tmpDir . '/phpstan-drupal.neon');
+    }
 
-        $etmMock->method('getDefinitions')->willReturn([
-            'node' => $etdMock
-        ]);
-        $container->set('entity_type.manager', $etmMock);
-        \Drupal::setContainer($container);
+    public function testCreateNeon(): void
+    {
+        $this->createDrupalContainer();
 
         $command = new PhpstanDrupalDrushCommands();
         $command->setInput(new ArrayInput([]));
@@ -55,4 +57,74 @@ class: Drupal\node\Entity\Node
 ', $output->fetch());
     }
 
+    public function testWriteNeon(): void
+    {
+        $configFile = self::$tmpDir . '/phpstan-drupal.neon';
+
+        $this->createDrupalContainer();
+
+        $command = new PhpstanDrupalDrushCommands();
+        $command->setInput(new ArrayInput([]));
+        $output = new BufferedOutput();
+        $command->setOutput($output);
+
+        $command->setup([
+            'drupal_root' => '',
+            'file' => $configFile
+        ]);
+
+        self::assertFileExists($configFile);
+
+        // Build the container, which validates all parameters.
+        try {
+            self::getContainer();
+        } catch (\Throwable $e) {
+            if (strpos(get_class($e), 'Nette\Schema\ValidationException') !== FALSE) {
+                self::fail('PHPStan config validation error: ' . $e->getMessage());
+            } else {
+                throw $e;
+            }
+        }
+
+        // Verify config after validation.
+        self::assertEquals('parameters:
+	level: 2
+	paths:
+		- tests/fixtures/drupal/modules/custom
+		- tests/fixtures/drupal/themes/custom
+		- tests/fixtures/drupal/profiles/custom
+	drupal:
+		drupal_root: tests/fixtures/drupal
+		entityMapping:
+			node:
+				class: Drupal\node\Entity\Node
+				storage: Drupal\node\NodeStorage', file_get_contents($configFile));
+    }
+
+    public static function getAdditionalConfigFiles(): array
+    {
+        return array_merge(parent::getAdditionalConfigFiles(), [
+            __DIR__ . '/../../../fixtures/config/phpstan-drupal-includes.neon',
+            self::$tmpDir . '/phpstan-drupal.neon',
+        ]);
+    }
+
+    private function createDrupalContainer(): void
+    {
+        $container = new ContainerBuilder();
+
+        $etdMock = $this->createStub(EntityTypeInterface::class);
+        $etdMock->method('id')->willReturn('node');
+        /** @phpstan-ignore-next-line */
+        $etdMock->method('getClass')->willReturn(Node::class);
+        /** @phpstan-ignore-next-line */
+        $etdMock->method('getStorageClass')->willReturn(NodeStorage::class);
+
+        $etmMock = $this->createStub(EntityTypeManagerInterface::class);
+        $etmMock->method('getDefinitions')->willReturn([
+            'node' => $etdMock
+        ]);
+        $container->set('entity_type.manager', $etmMock);
+        \Drupal::setContainer($container);
+    }
 }