Class Central is learner-supported. When you buy through links on our site, we may earn an affiliate commission.

Refactoring by Leveraging Tests with Scala & ScalaTest

Go to class Write review

Details

Provider

CodeSignal
Pricing

Free Certificate
Languages

English
Certificate

Certificate Available
Duration & workload

3 hours
Sessions

On-Demand
Level

Intermediate

Found in

Part of

Test-Driven Development in Scala 3, ScalaTest, and Mockito

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 Duplicated Code: Extract Functions and Refactor Magic Numbers

Refactor Duplicate Code in the Tests
Refactor Tests using Parameterization
Extract Function: calculateItemCost
Refactor Duplication between Calculate Functions
Refactor Magic Numbers to Constants

Unit 2: Refactoring Long Methods with the Extract Method Technique

Extract User Validation
Extracting Validation into Validator Objects
Extract Data Normalization
Focusing on the Data Store

Unit 3: Long Parameter List: Introduce Parameter Object

Streamline Parameters with a Parameter Object
Introduce a CoursePolicy Parameter Object
Re-Order Parameters for Cohesion
Provide Defaults for Most Parameters

Unit 4: Feature Envy: Move Method Refactoring with TDD

Extract StudentGrade Logic
Refactor: Move method calculateFinalGrade
Getting rid of the GradeAnalyzer
Eliminate Feature Envy from the Student

Unit 5: Large Classes: Extract Class Refactoring

Extract a CartItemCollection
Extract a PriceCalculator
Extract a DiscountCalculator Class
Write Tests for Extracted Classes

Reviews

Start your review of Refactoring by Leveraging Tests with Scala & ScalaTest