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Back-end Engineering

Refactoring by Leveraging Your Tests with Swift and XCTest

This course focuses on the Refactor step in TDD, teaching developers to spot code smells and resolve them through refactoring. Using real-world examples, you'll identify common issues, apply refactoring techniques, and ensure functionality is preserved with existing tests.

Swift

XCTest

See path

5 lessons

20 practices

3 hours

Computer Science Fundamentals

Lessons and practices

Lesson 1: Refactoring in Swift: Eliminating Code Duplication and Magic Numbers

Refactoring Test Setup in ShoppingCartTests

Refactoring Duplicated Test Cases in ShoppingCart Test Suite

Refactoring Duplicated Logic in ShoppingCart Class

Refactoring Magic Numbers in ShoppingCart Class

Lesson 2: Refactoring in Swift: Extract Method for Improved Code Maintainability

Refactor User Registration Service by Extracting Validation Logic

Refactor User Registration Service by Extracting Address Validation Logic

Refactor User Registration Service by Extracting Data Normalization Logic

Refactor User Registration Service to Use RandomIDGenerator and Update DataStore Interface

Lesson 3: Refactoring in Swift: Simplifying Function Signatures with Parameter Objects

Refactor ProcessExamScore with ScoreWeights Parameter Object

Refactor ProcessExamScore with CoursePolicy Parameter Object

Refactor ProcessExamScore Function by Reordering Parameters for Clarity

Refactor ProcessExamScore Function to Include Default Parameter Values

Lesson 4: Refactoring in Swift: Addressing Feature Envy with Move Method

Refactoring Feature Envy in GradeAnalyzer with Swift

Refactoring Feature Envy by Moving getFailedAssignments to Student Class

Refactoring Feature Envy by Introducing StudentGradeCollection in Swift

Lesson 5: Refactoring in Swift: Tackling Large Classes with Extract Class Technique

Refactoring Shopping Cart with Extract Class Technique in Swift

Refactoring ShoppingCart with PriceCalculator Class in Swift

Refactoring ShoppingCart with DiscountCalculator Class in Swift

Implementing Tests for DiscountCalculator and PriceCalculator in Swift

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