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CodeSignal

Refactoring by Leveraging Your Tests with Rust

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Overview

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.

Syllabus

  • Unit 1: Eliminating Code Duplication and Refactoring in Rust
    • Refactor ShoppingCart Test Suite for Maintainability
    • Refactoring ShoppingCart Test Suite for Parameterization
    • Refactor ShoppingCart to Remove Duplication
    • Refactor ShoppingCart to Eliminate Loop Duplication
    • Refactor Magic Numbers into Constants in ShoppingCart
  • Unit 2: Refactoring Long Functions in Rust Using Extract Function Technique
    • Refactor User Validation Logic in Registration Service
    • Refactor Data Normalization Logic into Separate Function or Struct
  • Unit 3: Structs as Parameter Objects in Rust: Simplifying Complex Function Signatures
    • Refactor Code to Use ScoreWeights Parameter in ExamProcessor
    • Refactor Exam Processor with Parameter Object Pattern in Rust
    • Refactor Exam Score Function by Reordering Parameters
    • Refactor and Provide Defaults for Exam Processor API
  • Unit 4: Refactoring Feature Envy in Rust Using Struct Method Reallocation
    • Refactor GradeAnalyzer for Better Encapsulation in Rust
    • Refactor Grade Calculation to Student Struct
    • Refactoring GetFailedAssignments Function to Reduce Feature Envy
    • Refactoring Student Grade Management in Rust
  • Unit 5: Addressing the "Large Struct" Code Smell by Extracting Into Focused Structs
    • Refactor ShoppingCart to Use CartItemCollection for Item Management
    • Refactor ShoppingCart with PriceCalculator Struct
    • Refactor Discount Logic into DiscountCalculator Struct
    • Implementing and Testing Shopping Cart Calculators in Rust

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