--- /dev/null
+<?php
+
+namespace Drupal\Tests\Component\Annotation;
+
+use Drupal\Component\Annotation\Reflection\MockFileFinder;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @coversDefaultClass \Drupal\Component\Annotation\Reflection\MockFileFinder
+ * @group Annotation
+ */
+class MockFileFinderTest extends TestCase {
+
+ /**
+ * @covers ::create
+ * @covers ::findFile
+ */
+ public function testFindFile() {
+ $tmp = MockFileFinder::create('testfilename.txt');
+ $this->assertEquals('testfilename.txt', $tmp->findFile('n/a'));
+ $this->assertEquals('testfilename.txt', $tmp->findFile('someclass'));
+ }
+
+}