Issue #2691681 by Primsi, slashrsm: Add tests that cover file uploading

tests/src/Kernel/DropzoneJsUploadControllerTest.php

@@ -0,0 +1,96 @@
+<?php
+
+namespace Drupal\Tests\dropzonejs\Kernel;
+
+use Drupal\dropzonejs\Controller\UploadController;
+use Drupal\KernelTests\KernelTestBase;
+use Symfony\Component\HttpFoundation\File\UploadedFile;
+use Symfony\Component\HttpFoundation\FileBag;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Tests dropzoneJs upload controller.
+ *
+ * @group DropzoneJs
+ */
+class DropzoneJsUploadControllerTest extends KernelTestBase {
+
+  /**
+   * Temporary file (location + name).
+   *
+   * @var string
+   */
+  protected $tmpFile = '';
+
+  /**
+   * Temp dir.
+   *
+   * @var string
+   */
+  protected $filesDir = '';
+
+  /**
+   * Testfile prefix.
+   *
+   * @var string
+   */
+  protected $testfilePrefix = 'dropzonejstest_';
+
+  /**
+   * Testfile data.
+   *
+   * @var string
+   */
+  protected $testfileData = 'DropzoneJs test file data';
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = ['system', 'file', 'user', 'dropzonejs'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    $this->installSchema('system', 'router');
+    $this->installEntitySchema('user');
+
+    $this->filesDir = $this->siteDirectory . '/files';
+    $config = $this->container->get('config.factory');
+    $config->getEditable('system.file')
+      ->set('path.temporary', $this->filesDir)
+      ->save();
+
+    $this->tmpFile = tempnam($this->filesDir, $this->testfilePrefix);
+    $this->tmpFile = tempnam('', $this->testfilePrefix);
+    file_put_contents($this->tmpFile, $this->testfileData);
+  }
+
+  /**
+   * Test that dropzoneJs correctly handles uploads.
+   */
+  public function testDropzoneJsUploadController() {
+    $this->container->get('router.builder')->rebuild();
+
+    $uploaded_file = new UploadedFile($this->tmpFile, "{$this->testfilePrefix}controller");
+    $file_bag = new FileBag();
+    $file_bag->set('file', $uploaded_file);
+
+    $request = new Request();
+    $request->files = $file_bag;
+
+    $upload_handler = $this->container->get('dropzonejs.upload_handler');
+    $controller = new UploadController($upload_handler, $request);
+    $controller_result = $controller->handleUploads();
+    $this->assertTrue($controller_result instanceof JsonResponse);
+
+    $result = json_decode($controller_result->getContent());
+    $result_file = $this->filesDir . '/' . $result->result;
+    $this->assertTrue(file_exists($result_file));
+    $this->assertEquals(file_get_contents($result_file), $this->testfileData);
+  }
+}