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diff --git a/tests/Unit/Controller/UserApiControllerTest.php b/tests/Unit/Controller/UserApiControllerTest.php
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+++ b/tests/Unit/Controller/UserApiControllerTest.php
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+<?php
+/**
+ * Nextcloud - News
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later. See the COPYING file.
+ *
+ * @author    Alessandro Cosentino <cosenal@gmail.com>
+ * @author    Bernhard Posselt <dev@bernhard-posselt.com>
+ * @copyright 2012 Alessandro Cosentino
+ * @copyright 2012-2014 Bernhard Posselt
+ */
+
+namespace OCA\News\Tests\Unit\Controller;
+
+use OCA\News\Controller\UserApiController;
+use OCP\Files\File;
+use OCP\Files\IRootFolder;
+use OCP\IRequest;
+use OCP\IUser;
+use OCP\IUserSession;
+
+use PHPUnit\Framework\TestCase;
+
+class UserApiControllerTest extends TestCase
+{
+
+    private $request;
+    private $appName;
+    private $rootFolder;
+    private $userSession;
+    private $controller;
+    private $user;
+    private $file;
+
+    protected function setUp(): void
+    {
+        $this->appName = 'news';
+        $this->request = $this->getMockBuilder(IRequest::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        $this->rootFolder = $this->getMockBuilder(IRootFolder::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        $this->file = $this->getMockBuilder(File::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        $this->userSession = $this->getMockBuilder(IUserSession::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        $this->user = $this->getMockBuilder(IUser::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        $this->controller = new UserApiController(
+            $this->appName, $this->request, $this->userSession,
+            $this->rootFolder
+        );
+
+
+    }
+
+    private function expectUser($uid, $displayName, $lastLogin)
+    {
+        $this->userSession->expects($this->any())
+            ->method('getUser')
+            ->will($this->returnValue($this->user));
+        $this->user->expects($this->any())
+            ->method('getUID')
+            ->will($this->returnValue($uid));
+        $this->user->expects($this->any())
+            ->method('getLastLogin')
+            ->will($this->returnValue($lastLogin));
+        $this->user->expects($this->any())
+            ->method('getDisplayName')
+            ->will($this->returnValue($displayName));
+    }
+
+    private function expectImg($isJpg, $isPng, $user, $exists, $data)
+    {
+        $jpg = '/' . $user . '/' . 'avatar.jpg';
+        $png = '/' . $user . '/' . 'avatar.png';
+
+        $this->rootFolder->expects($this->any())
+            ->method('nodeExists')
+            ->will(
+                $this->returnValueMap(
+                    [
+                    [$jpg, $isJpg],
+                    [$png, $isPng]
+                    ]
+                )
+            );
+        $this->rootFolder->expects($this->any())
+            ->method('get')
+            ->will($this->returnValue($this->file));
+        $this->file->expects($this->any())
+            ->method('getContent')
+            ->will($this->returnValue($data));
+    }
+
+    public function testGetJpeg()
+    {
+        $this->expectUser('john', 'John', 123);
+        $this->expectImg(true, false, 'john', true, 'hi');
+
+        $result = $this->controller->index();
+        $expected = [
+            'userId' => 'john',
+            'displayName' => 'John',
+            'lastLoginTimestamp' => 123,
+            'avatar' => null
+        ];
+
+        $this->assertEquals($expected, $result);
+    }
+
+    public function testGetPng()
+    {
+        $this->expectUser('john', 'John', 123);
+        $this->expectImg(false, true, 'john', false, 'hi');
+
+        $result = $this->controller->index();
+        $expected = [
+            'userId' => 'john',
+            'displayName' => 'John',
+            'lastLoginTimestamp' => 123,
+            'avatar' => null
+        ];
+
+        $this->assertEquals($expected, $result);
+    }
+
+    public function testNoAvatar()
+    {
+        $this->expectUser('john', 'John', 123);
+        $this->expectImg(false, false, 'john', false, 'hi');
+
+        $result = $this->controller->index();
+        $expected = [
+            'userId' => 'john',
+            'displayName' => 'John',
+            'lastLoginTimestamp' => 123,
+            'avatar' => null
+        ];
+
+        $this->assertEquals($expected, $result);
+    }
+
+}