Fix possible null pointer.

tests/Unit/Handlers/Events/AdminEventHandlerTest.php

@@ -0,0 +1,82 @@
+<?php
+/**
+ * AdminEventHandlerTest.php
+ * Copyright (c) 2018 thegrumpydictator@gmail.com
+ *
+ * This file is part of Firefly III.
+ *
+ * Firefly III is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Firefly III is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Firefly III. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace Tests\Unit\Handlers\Events;
+
+
+use FireflyIII\Events\AdminRequestedTestMessage;
+use FireflyIII\Handlers\Events\AdminEventHandler;
+use FireflyIII\Mail\AdminTestMail;
+use FireflyIII\Repositories\User\UserRepositoryInterface;
+use Illuminate\Support\Facades\Mail;
+use Mockery;
+use Tests\TestCase;
+
+/**
+ * Class AdminEventHandlerTest
+ */
+class AdminEventHandlerTest extends TestCase
+{
+
+    /**
+     * @covers \FireflyIII\Handlers\Events\AdminEventHandler::sendTestMessage
+     * @covers \FireflyIII\Events\AdminRequestedTestMessage
+     */
+    public function testSendNoMessage()
+    {
+        $repository = $this->mock(UserRepositoryInterface::class);
+        $event      = new AdminRequestedTestMessage($this->user(), '127.0.0.1');
+
+
+        $repository->shouldReceive('hasRole')->withArgs([Mockery::any(), 'owner'])->andReturn(false)->once();
+
+        $listener = new AdminEventHandler();
+        $this->assertTrue($listener->sendTestMessage($event));
+    }
+
+    /**
+     * @covers \FireflyIII\Handlers\Events\AdminEventHandler::sendTestMessage
+     * @covers \FireflyIII\Events\AdminRequestedTestMessage
+     */
+    public function testSendTestMessage()
+    {
+        Mail::fake();
+        $repository = $this->mock(UserRepositoryInterface::class);
+        $event      = new AdminRequestedTestMessage($this->user(), '127.0.0.1');
+
+
+        $repository->shouldReceive('hasRole')->withArgs([Mockery::any(), 'owner'])->andReturn(true)->once();
+
+        $listener = new AdminEventHandler();
+        $this->assertTrue($listener->sendTestMessage($event));
+
+        // assert a message was sent.
+        Mail::assertSent(
+            AdminTestMail::class, function ($mail) {
+            return $mail->hasTo('thegrumpydictator@gmail.com') && '127.0.0.1' === $mail->ipAddress;
+        }
+        );
+
+    }
+
+}