Tugas 2 OOP tentang Merancang Class Sederhana, membuat UML(diagram class), dan Unit Testing

Summary

In this video, Fika Fransiska Andini from the Computer Engineering program explains the design of a simple class in Python, called `ClassBook`, using Object-Oriented Programming (OOP). The video covers the creation of a UML class diagram to visualize the book class structure, followed by Python code implementation for attributes like title, author, year, and price. It also demonstrates unit testing to ensure the methods, like applying discounts, work correctly. The presentation highlights how UML, OOP, and unit testing can help in creating structured and efficient software.

Takeaways

• 😀 The script introduces Fika Fransiska Andini, a student from the Computer Engineering program, explaining the design of a simple class in Python using an example called 'classbook'.
• 😀 The main concepts of Object-Oriented Programming (OOP) are discussed, focusing on creating classes to represent real-world objects, like a book, with attributes and methods.
• 😀 The 'classbook' represents a book with key attributes: title, author, year, and price, which are part of the book's data structure.
• 😀 The UML class diagram is used to visualize the class structure, with attributes like title (string), author (string), year (integer), and price (float).
• 😀 Methods like 'get_title', 'get_author', 'get_year', 'get_price', and 'apply_discount' are designed to manipulate and retrieve book data.
• 😀 In the Python implementation of 'classbook', the constructor method initializes the book's attributes, and the 'apply_discount' method adjusts the price based on a given discount.
• 😀 The 'info' method is used to display book details, including its title, author, year, and discounted price.
• 😀 Unit testing is introduced using Python's 'unittest' library to automate the testing process and ensure that the 'classbook' implementation works as intended.
• 😀 A test case for creating a book object is provided, verifying that the attributes are correctly assigned, such as checking that the author is 'Andi' and the title is 'Python'.
• 😀 Another test case checks the discount functionality, asserting that after applying a 10% discount, the book's price is correctly updated to 90,000.
• 😀 The video concludes by emphasizing that 'classbook' was designed using OOP principles in Python, with UML diagrams helping to document the design and unit testing ensuring the accuracy of the code.

Q & A

What is the main topic discussed in the video?

The main topic of the video is designing a simple Python class named 'classbook' to represent a book, along with demonstrating the use of Object-Oriented Programming (OOP), UML class diagrams, Python code implementation, and unit testing.

What are the primary attributes of the 'classbook' class?

The primary attributes of the 'classbook' class are 'title', 'author', 'year', and 'price'. These represent basic book details, such as the book's title, the author's name, the year of publication, and the book's price.

What is Object-Oriented Programming (OOP), and how is it used in the classbook example?

Object-Oriented Programming (OOP) is a programming paradigm that uses classes and objects to model real-world entities. In the 'classbook' example, OOP is used to create a 'Book' class that encapsulates attributes (like title, author, year, and price) and methods (like apply_discount and get_info) to represent and manage book data.

What is the purpose of the UML class diagram in the video?

The UML class diagram is used to visually represent the structure of the 'classbook' class. It shows the class name, its attributes, and methods, providing a clear and organized view of how the class is designed before implementation.

How is the 'apply_discount' method implemented in the 'classbook' class?

The 'apply_discount' method is implemented by multiplying the book's price by (1 - discount). This reduces the price based on the given discount percentage, allowing the user to apply a discount to the book's price.

What role does the 'get_info' method serve in the 'classbook' class?

The 'get_info' method returns a string containing key details about the book, such as the title, author, year of publication, and price. It provides an easy way to access and display the book's information.

What is unit testing, and how is it used to test the 'classbook' class?

Unit testing is a software testing technique where individual components (or units) of the program are tested in isolation to ensure they work as expected. In this video, the 'unittest' module is used to test the functionality of the 'classbook' class, specifically checking if the class is created correctly and if the discount is applied accurately.

What does the unit test for 'book_creation' check?

The 'book_creation' unit test checks whether the 'classbook' object is created correctly by verifying if the title, author, year, and price attributes match the expected values when a new book is instantiated.

What is the purpose of the 'test_discount' unit test?

The 'test_discount' unit test checks if the 'apply_discount' method works properly by applying a 10% discount to a book's price and verifying if the new price is calculated correctly (in this case, 90,000 IDR for a book originally priced at 100,000 IDR).

Why is the use of UML diagrams beneficial in the design process of the 'classbook' class?

The use of UML diagrams helps to document the design of the 'classbook' class clearly and concisely before the implementation phase. It allows developers to visualize the structure and relationships within the class, ensuring better planning and communication during the development process.