” 辅导INFS2044程序、 写作Python编程INFS2044 Assignment 2Due date: Monday, 14 June 2021, 11:59 PMWeighting: 40% of the course total marks.Submission instructions are at the end of this document.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 thedocument 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 forStudents.zip archive on the course website.All submitted materials must be entirely your own work (except the source code given toyou 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 thatyour design and code are clean and self-documenting; code that works correctly but exhibitspoor quality will receive low scores. Refer to the marking scheme provided in thisdocument.The word count for this assignment will not be verified. Please do not write excessively longanswers (3k+ words). Excessively short answers, such as submitting only diagrams or codewithout reflection, are unlikely to satisfy the marking criteria.It is your responsibility to use appropriate document management and source code controltools if required and to always maintain adequate backup. Hardware and software failureare not usually acceptable reasons for requesting extensions.Start early and develop incrementally.Assignment tasksThis assignment consists of four tasks. More detailed instructions about developmentapproach and submission process can be found in the Submission Instructions at the end ofthis document.Task 1: Class Implementation DesignCreate a class-level design reflecting the to-be-created implementation of the system. Yourdesign must comply with the given component decomposition and extend the given partialimplementation 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 includeinteraction 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 thedesign.The answers to this task will Form part of the report to be submitted on learnonline. See theSubmission Instructions at the end of this document for details.Task 2: Tests and Quality AssuranceYou are expected to follow a test-driven development (TDD) approach when implementingthe system. That is, write the tests first, then write the source code of the implementation topass the tests.Develop your tests and code base incrementally. That is, you will be interleaving the workfor Task 2 and Task 3, and potentially extend and/or revise your implementation designcreated in Task 1 as you progress with these tasks.Use pytest to create and run the tests.Task 3: Source Code ImplementationImplement the design you have created in Task 1 so that the requirements of the case studyare 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 casescreated during Task 2.Use only standard packages that are available in a plain python 3.x distribution. No otherthird-party code is allowed unless approved by the Course Coordinator. Your code must bestrictly 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 thisassignment, it is expected that intention-revealing names are chosen in a consistent mannerthroughout your code. Consider using pylint to validate consistency of naming andadherence to coding standards. However, markers will not verify if any tools were used toimprove code quality.Task 4: ReflectionReflect on how you have conducted tasks 1-3, and how you have assured that the designand its implementation are correct and exhibit high quality.Describe the design principles and patterns (if any) you have adopted in the design andimplementation, 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 overquantity.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 memoryefficiency are not primary concerns in this assignment. Use tests to evidence that your implementation works correctly. Version source code in gGithub, bitbucket, or a similar system.Marking SchemeCriteria Marks(as a fraction ofcourse total)Task 1: Class-level Implementation Design Implementation design covers all components in the decomposition Class diagram(s) documenting the system implementation matches theactual implementation Design satisfies design principles Correct dependencies between components Diagrams are syntactically correct Class design is complete (includes classes, attributes, associations,public operations) Design is implementable and will achieve use case narratives10%Task 2: Quality Assurance and Testing Unit tests for all components defined Each test has a single objective Comprehensive test suite covering all normal situations, exceptionsituations, and boundary situations All tests run without errors10%Task 3: Source Code Implementation Source code is complete to achieve the use cases Source code matches the design created in Task 1 Intention-revealing and consistent naming Appropriate comments where comments are warranted Uses only approved packages and libraries15%Task 4: Reflection Discussion of changes made to the design as the implementationprogressed (if any) Discussion of the design principles and patterns that are evidenced inthe design and corresponding code (if any) Free of grammar/spelling mistakes Diagrams easily legible when printed on A4 paper5%Total 40%Submission InstructionsSubmit two files:1. a zip archive containing All source code and test code, and2. a report in PDF format.Source code Submit all source code (answers to tasks 23) as a ZIP archive to learnonline. The archive must contain separate source files for the system implementation andthe unit tests. That is, tests should be in a separate file, not in the same file as thecode implementing the system. You can split the source code across multiple source files/packages if you like. The system must be runnable by executing the main.py file. All tests must be runnable via pytest. The archive must contain all source code and test code to run and test the system.Please include only source code and documentation files; exclude generated files,IDE configuration files, etc.Report The report shall contain the design documentation (UML diagrams), relateddiscussion, and reflection as described in the Assignment tasks 1 4. Please use following overall structure:1. Cover page Include your name, student identifier, and email address2. Class-Level Design Present the UML diagram(s) and related discussion State assumptions you have made and their impact on the design3. Quality Assurance Briefly summarise your approach to quality assurance during creationof the design and source code. Briefly describe your approach to Test-driven development of theprogram Do NOT include pytest and pylint reports in the submission.4. Reflection Describe any major changes that you may have made duringdevelopment (if any) and give reasons Describe the design Principles and patterns (if any) you have adoptedin the design and implementation, as evidenced in the diagrams andsource code. Submit your report to learnonline in PDF format.请加QQ：99515681 或邮箱：99515681@qq.com WX：codehelp
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