The Pester Book (retired)
This book is 70% complete
Last updated on 2017-02-20
About the Book
This book has been retired, and Adam is now working on it on his own. You can find the “replacement” book at https://leanpub.com/pesterbook, and Adam can be contacted there (on the “Email the Author” section) or on Twitter @adbertram.
About the Authors
Table of Contents
-
- About This Book
- About the Author
- Foreword
- Feedback
- Code Samples
-
Introduction
- Testing as Institutional Memory
- Testing Drives Better Modularization
- Tests as Functional Specifications
- Tests in Automated Build Pipelines
- Automated Testing!
- Where We’re Not Going
-
Part 1: Meet Pester
-
Pester Concepts
- Tests
- Mocks
- Assertions
- Scaffolding
- TestDrive
-
Designing for Testing
- Input is Via Parameters
- Output is Via the Pipeline
- Actions Aren’t Output
- Tightly Scoped Commands are Easiest to Test
- A Word for DSC Resource Authors
-
Describe and Context Blocks
- A Describe is a Scope
- A Describe Can be Tagged
- A Describe Contains…
- Before and After Blocks
-
It Blocks
- Examples
- The Actual Test
-
Should
- Be and BeExactly
- BeLessThan, BeGreaterThan
- Wildcard Comparisons: BeLike, BeLikeExactly; Match, MatchExactly
- Object Type: BeOfType
- Errors: Throw
- Objects Exist: Exist
- Strings in Files: Contain, ContainExactly
- Nothing: BeNullOrEmpty
- BeIn (an Array)
- Remember: Should is a Command That Can Throw Exceptions
-
Test Cases
- Creating Tests for Different Parameters
- Using the TestCases parameter
- Using the Test Name Token
- Test Cases Have Many Uses
-
Mocks
- Mocking Specific Object Types
- Mock Scope
- Module-Level Mocks
- Parameter Filters
- Verifying Mocks
-
The TESTDRIVE: Drive
- Referencing Test Drive as a PSDrive
- Referencing TestDrive as a Variable
-
Pester Concepts
-
Part 2: Using Pester
-
Design Practices
- Testing is a Forever Thing
- Dealing with Modules and Dot-Sourced Scripts
- The Input/Execution/Output Pattern
- Naming Conventions
- Tagging
-
Adding Tests For a Function
- Understand the Subject
- Designing Tests
- Writing the Test
- Future Iterations
- Comparing to Warren’s Tests
- Wrapping Up
-
Adding Tests - Again
- The Code
- Analyzing the Code
- Refactoring the Code for Testability
- Limiting Function Input
- Writing the Tests
- Wrapping Up
- Working with Pester Output
-
Infrastructure Validation
- Infrastructure Validation in Pester
- Analyzing the Code
- Getting Testing Dependencies in Place
- Prototyping the Tests
- Writing the Infrastructure Tests
- Dependencies
- Building Dependency Discovery Code
- Adding Dependency Checking to Tests
- Switching it Up
-
Mocking the Unmockable
-
Methods
- Wrapping Up
-
- Cross-Platform Pester
- Testing GUI Scripts
- Troubleshooting Tests
-
Design Practices
-
Part 3: Code Coverage
-
Why Code Coverage?
- Code Coverage Metrics
- So… Why Code Coverage?
- The Test Case Tie-In
-
Using Pester to Measure Code Coverage
- A Simple Code Coverage Test
- Getting Granular with Code Coverage
-
Improving Code Coverage
- Start Here
- Analyzing Code Coverage
-
A Pester Case Study
- Background
- TO BE CONTINUED…..
-
Why Code Coverage?
-
Part 4: Pester Cookbook
-
Recipe: Testing for Live Conditions
- The Recipe
- The Background
-
Recipe: Testing Scheduled Tasks
- The Recipe
- The Background
-
Recipe: Testing for Installed Software
- The Recipe
- The Background
-
Recipe: Ensuring all Functions in a Module Have Tests
- The Recipe
- The Background
-
Recipe: Testing Scheduled Tasks
- The Recipe
- The Background
-
Recipe: Testing External Applications
- Testing Exit Codes from EXE Files In Scripts
- The Background
- Testing Exit Codes from Standalone EXE files
- The Background
-
Recipe: Common Tests for Functions and Modules
- The Recipe
- The Background
-
Recipe: Testing Script Blocks
- The Recipe
- The Background
- Release Notes
-
Recipe: Testing for Live Conditions
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