public function testAnswerCRUD_Works()
 {
     $environ = new MongoTestEnvironment();
     $environ->clean();
     $textRef = MongoTestEnvironment::mockId();
     $project = $environ->createProject(SF_TESTPROJECT, SF_TESTPROJECTCODE);
     // Create Question
     $question = new QuestionModel($project);
     $question->title = "Some Question";
     $question->textRef->id = $textRef;
     $questionId = $question->write();
     // Create Answer
     $answer = new AnswerModel();
     $answer->content = 'Some answer';
     $answerId = $question->writeAnswer($answer);
     // List
     $question->read($questionId);
     $count = count($question->answers[$answerId]->comments);
     $this->assertEquals(0, $count);
     // Create
     $comment = new CommentModel();
     $comment->content = 'Some comment';
     $id = QuestionModel::writeComment($project->databaseName(), $questionId, $answerId, $comment);
     $this->assertNotNull($id);
     $this->assertInternalType('string', $id);
     $this->assertEquals(24, strlen($id));
     $this->assertEquals($comment->id->asString(), $id);
     // Read back
     $otherQuestion = new QuestionModel($project, $questionId);
     $otherComment = $otherQuestion->answers[$answerId]->comments[$id];
     $this->assertEquals($id, $otherComment->id->asString());
     $this->assertEquals('Some comment', $otherComment->content);
     // Update
     $otherComment->content = 'Other comment';
     $otherId = $question->writeComment($project->databaseName(), $questionId, $answerId, $otherComment);
     $this->assertEquals($id, $otherId);
     // Read back
     $otherQuestion = new QuestionModel($project, $questionId);
     $otherComment = $otherQuestion->answers[$answerId]->comments[$id];
     $this->assertEquals($id, $otherComment->id->asString());
     $this->assertEquals('Other comment', $otherComment->content);
     // List
     $count = count($otherQuestion->answers[$answerId]->comments);
     $this->assertEquals(1, $count);
     // Delete
     QuestionModel::removeComment($project->databaseName(), $questionId, $answerId, $id);
     // List
     $otherQuestion->read($questionId);
     $count = count($otherQuestion->answers[$answerId]->comments);
     $this->assertEquals(0, $count);
 }
 public static function removeComment($projectId, $questionId, $answerId, $commentId)
 {
     $projectModel = new ProjectModel($projectId);
     ProjectCommands::checkIfArchivedAndThrow($projectModel);
     return QuestionModel::removeComment($projectModel->databaseName(), $questionId, $answerId, $commentId);
 }