Cover quizzes with tests

Problem/Motivation

Automated tests must cover as much as possible features in Anu LMS to avoid bugs during development of new features.

Acceptance criteria

• The new test is added to "anu_lms_assessments" module and requires only "anu_lms + anu_lms_assessments"
• The test covers all types of questions for quizzes
• The test covers all possible settings for quizzes

Tech concept

• Add a new test in anu_lms_assessments module (it should be FunctionalJavascript test)
• Create a new quiz
• Add Question: Long answer
• Add Question: Multiple choice
• Add Question: Scale
• Add Question: Short answer
• Add Question: Single choice
• Save it.
• Use correct/incorrect answers for all questions and make sure after hitting Submit it gets some explanation (f.e. for "Short Answer" should appear "Suggested answer CORRECT_ANSWER" message under the input).
• Also make sure that Finish button is disabled till form will not be Submitted.
• Edit that quiz and tick "Hide correct answers". Save it.
• Go through all questions and make sure that correct answers don't appear on the page after submitting any answers.
• Edit that quiz and tick "Prevent multiple submissions". Save it.
• Go through all questions again.
• Open the quiz page again and go through all steps, make sure that all fields are disabled because were filled out before.