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CodeSignal

Red-Green-Refactor: Practicing TDD with Swift & XCTest

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Overview

This course focuses on practicing the core TDD workflow: "Red-Green-Refactor." You'll write failing tests (Red), implement code to pass them (Green), and refactor while keeping tests passing (Refactor). No new concepts are introduced—just hands-on practice with various requirements to sharpen your TDD skills.

Syllabus

  • Unit 1: Test Driven Development with Swift and XCTest
    • Correct Discount Application Task
    • Zero Discount Handling Task
    • Decimal Discount Precision Task
    • Negative Price Handling Task
    • Discount Percentage Greater Than 100% Handling Task
    • Negative Discount Percentage Handling Task
  • Unit 2: Test Driven Development with Swift: Advanced Discount Function Requirements
    • Non-Numeric Price Input Handling in Discount Calculation
    • Non-Numeric Discount Input Handling in Discount Calculation
    • Handling Very Small Prices in Discount Calculation
    • Minimum Discount Percentage Application in Discount Calculation
    • Capping Maximum Discount Amount in Discount Calculation
  • Unit 3: Introduction to Test Driven Development with Swift: Building a Shopping Cart Module
    • Starting with an Empty Cart
    • Adding a Single Item to the Shopping Cart
    • Adding Multiple Items to the Shopping Cart
    • Handling Multiple Quantities of the Same Item in Shopping Cart
    • Removing an Item from the Shopping Cart
  • Unit 4: Advanced Test Driven Development with Swift: Expanding the Shopping Cart Module
    • Removing a Non-Existent Item from Shopping Cart
    • Applying Percentage Discount to Shopping Cart
    • Applying a Bulk Discount to Shopping Cart
    • Clearing All Items from Shopping Cart
    • Updating Item Quantity in Shopping Cart
  • Unit 5: Expanding the Shopping Cart Module with Swift and XCTest
    • Quantity Limit for Single Item in Shopping Cart
    • Retrieving Item Details by ID in Shopping Cart
    • Applying Discount Codes in Shopping Cart
    • Invalid Discount Code Handling in Shopping Cart
    • Adding an Existing Item in Shopping Cart
    • Adding to an Existing Item Respects Maximum Quantity in Shopping Cart

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