Java Testing with JUnit 5

 

Java with OO Development programmers as well as developers with JUnit 3 and 4 experience. that need to update their skills to JUnit 5.
 

The student is expected to have a good working knowledge of Java and OO, including the use of interfaces, abstract classes, collections, factories, and generics. Experience with Java 8 lambda expressions is helpful, but not strictly required. A brief primer on the Java 8 features employed by JUnit is included in the course.
 

Java Testing with JUnit 5

• Overview
• Agenda
• Conventions

Session 1: Unit Testing with JUnit 5

• Objectives

Overview

• Testing Overview
• Overview
• JUnit 5
• New in JUnit 5?
• Library Components
• Library Components - Illustrated
• a Test - First Example
• Tests in the IDE
• Tests in Other Environments
• Conventions and Organizing Tests
• 1.1 - Getting Started with JUnit

Tests and Assertions

• Test Methods
• All about Expectations
• Point Assertions
• Messages
• Messages - Useful or Not?
• Messages - a Practical Approach
• 1.2 - Tests and Assertions

Test Fixtures and Lifecycle

• Fixtures - @BeforeEach and @AfterEach
• Fixtures - Example
• and @AfterAll
• of Execution - Full Test Lifecycle
• Instance Creation
• Lifecycle
• 1.3 - Test Fixtures and Lifecycle

Session 2: Writing and Running Tests

• Objectives
• Aside - Java 8 New Features -
• and Optionals
• and Static Interface Methods
• Interface - Defined
• a Method Down to its Essence
• Expression as Functional Interface
• Interfaces and Lambdas
• Functional Interfaces
• in JUnit - Executable
• in JUnit - ThrowingSupplier<T>
• in JUnit - ThrowingConsumer<T>

Additional Testing Needs

• for Exceptions
• for Exceptions - Example
• Timeouts
• Timeouts - Example
• Groups
• Groups - Example
• 2.1 - Exceptions, Assertion Groups, and Timeouts

Running Tests

• Library Components - Revisited
• of Ways to Run Tests
• Support - Eclipse
• Support - IntelliJ IDEA
• for Maven Project - mvn test
• maven-surefire-plugin
• Platform Console Launcher
• the Console Launcher
• Tests Programmatically
• Which Tests Get Run
• Discovery and Selection
• 2.2 - Running Tests
• Names
• and Filtering Tests with Tags
• Tags at Test Run
• Expressions
• Parameters
• Configuration Parameters
• Tests
• Test Class Results - Illustrated
• Test Class Results - Illustrated
• Tests - Example
• for Nested Test Classes
• 2.3 - Test Reporting and Filtering

Advanced Capabilities

• Composed Annotations
• Good OO in Test Classes
• with Test Classes
• All about Removing Redundancy
• - Overview
• and Using Extensions
• and Insertion Points
• Lifecycle with Extension Callbacks
• Test Execution [new in 5.1.0]
• Tests vs Assumptions
• Conditions at Runtime
• Tests
• Tests - Details
• 2.4 - Advanced Capabilities

JUnit 4 Migration

• Do Nothing Case
• with Old Software
• JUnit 4 Tests to Jupiter API
• in Migration - API Changes
• in Migration - Runners and Rules
• 4 Test Suites
• 4 Test Suites on the JUnit Platform
• 4 Test Suites - Example

Best Practices

• Are Real Code
• to Test
• void and Private Methods
• Thorough
• Small Tests vs. Fewer Large Tests
• to Break It
• and Broad Testing
• of Good Tests
• Testable Code
• Testable Code
• Anti-Patterns
• Reading

Session 3: Testing with Mocks

• Objectives

Overview

• of Mock Objects
• as Collaborators
• Mockito

Creating and Using Mocks

• Steps in Mocking
• Mockito Class
• Evolution in Mock Creation
• Creation with JUnit 5
• Method Calls
• Much Stubbing?
• - Business Object and Collaborator
• - Setting up the Mock and Testing
• 3.1 - Using Mock Objects

Additional Capabilities

• Matchers
• Argument Matchers
• Mocking with Spies
• the Unmockable
• Injection of Mocks
• Injection of Mocks
• 3.2 - Additional Capabilities [Optional HW]

Session 4: Testing Enterprise Components

• Objectives

Overview

• of Testing
• of Testing
• Issues Involved
• and the HAS-A Relationship
• in the Java EE Container
• Options
• vs. In-Container Testing
• vs. In-Container Testing
• vs. In-Container Testing
• Necessarily Competitors

Testing the Persistence Layer

• vs. Implementation
• Really Need a Database
• vs. In-Container Testing
• Specific to Database Testing
• 4.1 - Testing the Persistence Layerr
• Testing
• It Looks Like
• Configuration and Deployment

Testing Services

• Issues, Different Layer
• It Worth It?

Testing Web Components

• Saved the Hardest for Last
• Issues, Easier Answer
• Testing Isn't Enough
• vs. Automated Testing
• as Much as Possible
• the Web Browser

Recap

• of What We've Done
• of What We've Done