Added event for removed comments with some refactoring

tests/units/EventBuilder/CommentEventBuilderTest.php

@@ -0,0 +1,37 @@
+<?php
+
+use Kanboard\EventBuilder\CommentEventBuilder;
+use Kanboard\Model\CommentModel;
+use Kanboard\Model\ProjectModel;
+use Kanboard\Model\TaskCreationModel;
+
+require_once __DIR__.'/../Base.php';
+
+class CommentEventBuilderTest extends Base
+{
+    public function testWithMissingComment()
+    {
+        $commentEventBuilder = new CommentEventBuilder($this->container);
+        $commentEventBuilder->withCommentId(42);
+        $this->assertNull($commentEventBuilder->build());
+    }
+
+    public function testBuild()
+    {
+        $commentModel = new CommentModel($this->container);
+        $taskCreationModel = new TaskCreationModel($this->container);
+        $projectModel = new ProjectModel($this->container);
+        $commentEventBuilder = new CommentEventBuilder($this->container);
+
+        $this->assertEquals(1, $projectModel->create(array('name' => 'test1')));
+        $this->assertEquals(1, $taskCreationModel->create(array('title' => 'test', 'project_id' => 1)));
+        $this->assertEquals(1, $commentModel->create(array('task_id' => 1, 'comment' => 'bla bla', 'user_id' => 1)));
+
+        $commentEventBuilder->withCommentId(1);
+        $event = $commentEventBuilder->build();
+
+        $this->assertInstanceOf('Kanboard\Event\CommentEvent', $event);
+        $this->assertNotEmpty($event['comment']);
+        $this->assertNotEmpty($event['task']);
+    }
+}