Effective Testing with RSpec 3

Name: Effective Testing with RSpec 3
Author: Myron Marston

Build Ruby Apps with Confidence

Paperback Engels 2017 331e druk 9781680501988

Verwachte levertijd ongeveer 9 werkdagen

31,62

In winkelwagen

Samenvatting

"Our tests are broken again!" "Why does the suite take so long to run?" "What value are we getting from these tests anyway?" Solve your testing problems by building and maintaining quality software with RSpec - the popular BDD-flavored Ruby testing framework. This definitive guide from RSpec's lead developer shows you how to use RSpec to drive more maintainable designs, specify and document expected behavior, and prevent regressions during refactoring.

Build a project using RSpec to design, describe, and test the behavior of your code. Whether you're new to automated tests or have been using them for years, this book will help you write more effective tests.

RSpec has been downloaded more than 100 million times and has inspired countless test frameworks in other languages. Use this influential Ruby testing framework to iteratively develop a project with the confidence that comes from well-tested code. This book guides you through creating a Ruby project with RSpec, and explores the individual components in detail.

Start by learning the basics of installing and using RSpec. Then build a real-world JSON API, using RSpec throughout the process to drive a BDD-style outside-in workflow. Apply an effective test strategy to write fast, robust tests that support evolutionary design through refactoring. The rest of the book provides the definitive guide to RSpec's components. Use rspec-core's metadata to slice and dice your spec suite. Dig into rspec-expectations' matchers: compose them in flexible ways, specify expected outcomes with precision, and diagnose problems quickly with the help of good failure messages. Write fast, isolated tests with rspec-mocks' test doubles while pushing your code toward simpler interfaces.

The authors, with a combined 20 years of automated testing experience, share testing wisdom that will lead to a fun, productive testing experience.

To follow along with the book, you'll need Ruby 2.2+. The book will guide you through installing RSpec 3 and setting up a new project to use it.

Specificaties

ISBN13:9781680501988

Trefwoorden:Programmeren, applicatieontwikkeling, Programmeertalen, Ruby, testen, RSpec

Taal:Engels

Bindwijze:paperback

Aantal pagina's:275

Uitgever:Pragmatic Bookshelf

Druk:331

Verschijningsdatum:25-7-2017

Hoofdrubriek:IT-management / ICT

Lezersrecensies

Wees de eerste die een lezersrecensie schrijft!

Schrijf een recensie

Uw cijfer

?

Log in om te stemmen

Inhoudsopgave

Introduction
Foreword

Getting Started
Getting Started With RSpec
Installing RSpec
Your First Spec
Understanding Failure
Sharing Setup (But Not Sandwiches)
Your Turn

From Writing Specs to Running Them excerpt
Customizing Your Specs’ Output
Identifying Slow Examples
Running Just What You Need
Marking Work in Progress
Your Turn

The RSpec Way
What Your Specs Are Doing for You
Comparing Costs and Benefits
Different Types of Specs
Guidelines

Building an App With RSpec 3
Starting On the Outside: Acceptance Specs
First Steps
Deciding What to Test First
Checking the Response
Filling In the Response Body
Querying the Data
Saving Your Progress: Pending Specs
Your Turn

Testing in Isolation: Unit Specs
From Acceptance Specs to Unit Specs
Filling In the First Spec
Handling Success
Refactoring
Handling Failure
Defining the Ledger
Your Turn

Getting Real: Integration Specs
Hooking Up the Database
Testing Ledger Behavior
Testing the Invalid Case excerpt
Isolating Your Specs Using Database Transactions
Filling In the Behavior
Querying Expenses
Ensuring the Application Works for Real
Your Turn

RSpec Core
Structuring Code Examples
Getting the Words Right
Sharing Common Logic
Sharing Example Groups
Your Turn

Slicing and Dicing Specs with Metadata
Defining Metadata
Reading Metadata
Selecting Which Specs to Run
Sharing Code Conditionally
Changing How Your Specs Run
Your Turn

Configuring RSpec
Command-Line Configuration
Setting Command-Line Defaults
Using a Custom Formatter
RSpec.configure
Your Turn

RSpec Expectations
Exploring RSpec Expectations
Parts of an Expectation
How Matchers Work
Composing Matchers
Generated Example Descriptions
Your Turn

Matchers Included in RSpec Expectations
Primitive Matchers
Higher-Order Matchers
Block Matchers
Your Turn

Creating Custom Matchers
Delegating to Existing Matchers Using Helper Methods
Defining Matcher Aliases
Negating Matchers
Using the Matcher DSL
Defining a Matcher Class
Your Turn

RSpec Mocks
Understanding Test Doubles
Types of Test Doubles
Usage Modes: Mocks, Stubs, and Spies
Origins: Pure, Partial, and Verifying Doubles excerpt
Your Turn

Customizing Test Doubles
Configuring Responses
Setting Constraints
Your Turn

Using Test Doubles Effectively
Constructing Your Test Environment
Stubject (Stubbing the Subject)
Using Partial Doubles Effectively
Connecting the Test Subject to Its Environment
The Risks of Mocking Third-Party Code
High-Fidelity Fakes
Faking I/O with StringIO
Wrapping a Third-Party Dependency
Your Turn