SymfonyUsageProviderTest: add testAutodetectConfigDir (#260)

Author: janedbal

tests/Provider/SymfonyUsageProviderTest.php

@@ -0,0 +1,38 @@
+<?php declare(strict_types = 1);
+
+namespace ShipMonk\PHPStan\DeadCode\Provider;
+
+use PHPStan\Testing\PHPStanTestCase;
+use ReflectionClass;
+use function mkdir;
+use function realpath;
+use function rmdir;
+
+class SymfonyUsageProviderTest extends PHPStanTestCase
+{
+
+    public function testAutodetectConfigDir(): void
+    {
+        $configDir = __DIR__ . '/../../config';
+        @mkdir($configDir);
+
+        $provider = new SymfonyUsageProvider(self::getContainer(), true, null);
+
+        $providerReflection = new ReflectionClass(SymfonyUsageProvider::class);
+        $configDirPropertyReflection = $providerReflection->getProperty('configDir');
+        $configDirPropertyReflection->setAccessible(true);
+
+        $configDirFromProperty = $configDirPropertyReflection->getValue($provider);
+
+        self::assertIsString($configDirFromProperty);
+        self::assertNotFalse(realpath($configDir));
+        self::assertNotFalse(realpath($configDirFromProperty));
+        self::assertSame(
+            realpath($configDir),
+            realpath($configDirFromProperty),
+        );
+
+        @rmdir($configDir);
+    }
+
+}