Instructions:

This assessment item must be conducted individually.

You will be creating an implementation design, implement it in python, and test the system. The assignment will be based on a case study and a partial design given to you. Refer to the document Assignment 2 Case Study on the course website for details about the case study.

Base your implementation on the code fragments given in Assignment 2 Code for Students.zip archive on the course website.

All submitted materials must be entirely your own work (except the source code given to you as part of the assignment specification).

Penalties apply for academic misconduct.

You will receive marks via learnonline within 3-4 weeks.

Answers will be scored based on correctness and completeness of your design and code,       and the quality of the design and corresponding code will be assessed. Please ensure that     your design and code are clean and self-documenting; code that works correctly but exhibits poor quality will receive low scores . Refer to the marking scheme provided in this                    document.

The word count for this assignment will not be verified. Please do not write excessively long answers (3k+ words). Excessively short answers, such as submitting only diagrams or code   without reflection, are unlikely to satisfy the marking criteria.

It is your responsibility to use appropriate document management and source code control tools if required and to always maintain adequate backup. Hardware and software failure   are not usually acceptable reasons for requesting extensions.

Start early and develop incrementally.

Assignment tasks

This assignment consists of four tasks. More detailed instructions about development          approach and submission process can be found in the Submission Instructions at the end of this document.

Task 1: Class Implementation Design

Create a class-level design reflecting the to-be-created implementation of the system. Your design must comply with the given component decomposition and extend the given partial implementation that accompany the case study.

Use design principles, patterns, and principles of clean code to guide your design.

Document your implementation design as UML class diagrams. In addition, you may include interaction diagrams if you deem them helpful to illustrate aspects of your design.                 Interaction diagrams are however optional.

Discuss any major assumptions that you may have made and how they have influenced the design.

The answers to this task will form part of the report to be submitted on learnonline. See the Submission Instructions at the end of this document for details.

Task 2: Tests and Quality Assurance

You are expected to follow a test-driven development (TDD) approach when implementing  the system. That is, write the tests first, then write the source code of the implementation to pass the tests.

Develop your tests and code base incrementally. That is, you will be interleaving the work for Task 2 and Task 3, and potentially extend and/or revise your implementation design    created in Task 1 as you progress with these tasks.

Use pytest to create and run the tests.

Ensure that your tests don’t modify the file system (that is, test should not create/delete files.)

Task 3: Source Code Implementation

Implement the design you have created in Task 1 so that the requirements of the case study are satisfied and all tests embodying the requirements run and pass .

At the end, you should present a complete implementation that

•   matches the design documented in Task 1,

•   completely implements the system specified in the case study,

•   demonstrably satisfies the case study requirements as evidenced by test cases created during Task 2.

Use only standard packages that are available in a plain python 3.x distribution and those    listed in the file requirements.txt in the provided code . No other third-party code is allowed unless approved by the Course Coordinator . Your code must be strictly cross-platform, that is, it must be pure python code.

The quality of your code will be assessed. While no coding standard is mandated for this       assignment, it is expected that intention-revealing names are chosen in a consistent manner throughout your code.

Task 4: Reflection

Reflect on how you have conducted tasks 1-3, and how you have assured that the design and its implementation are correct and exhibit high quality.

Describe the design principles and patterns (if any) you have adopted in the design and implementation, as evidenced in the diagrams and source code.

Describe any major changes that you may have made during development and give reasons.

The answers to this task should be at most 1 page. Quality of discussion is preferred over quantity.

Advice

•   Ensure that the design and its implementation match each other.

•   Strive for clean, maintainable, self-documenting code.

•   Focus your attention on the quality and readability of your code. Speed and memory efficiency are not primary concerns in this assignment.

•   Use tests to evidence that your implementation works correctly.

•   Version source code in github, bitbucket, or a similar system.

Marking Scheme

It is not sufficient to present code that works to pass this assignment. Your code must be designed and implemented according to the design and coding practices taught in this      course. Code that merely works but does not reflect these principles and practices will be awarded a Fail grade.