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Java Testing with JUnit 5

Price
1,170 USD
2 Days
EJCJ-600
Classroom Training, Online Training
Oracle

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  • Date: 8-Jul-2024 to 9-Jul-2024
    Time: 9AM - 5PM US Eastern
    Location: Virtual
    Language: English
    Delivered by: LearnQuest
    Price: 1,170 USD
  • Date: 28-Oct-2024 to 29-Oct-2024
    Time: 9AM - 5PM US Eastern
    Location: Virtual
    Language: English
    Delivered by: LearnQuest
    Price: 1,170 USD
  • Date: 23-Dec-2024 to 24-Dec-2024
    Time: 9AM - 5PM US Eastern
    Location: Virtual
    Language: English
    Delivered by: LearnQuest
    Price: 1,170 USD
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Course Description

Overview

This course introduces experienced Java developers to the fundamentals and best practices in unit testing. It uses the JUnit 5 and Mockito libraries, both of which are ubiquitous in the Java community. It is intended for both developers who are new to testing, as well as those who are already familiar with it, but want more experience with testing using JUnit 5. Note that JUnit 5 is substantively different than JUnit 4. Although the core testing principles are the same, there are substantial implementation differences, important new features, and a brand new extension model. Testing with mocks is covered in detail, using Mockito. We explore testing enterprise components in the persistence, service, and web layers, outlining the issues involved in each. In-container testing is introduced as a more meaningful approach to testing enterprise components, vs. standalone testing with mocks, and we examine this at each of the main layers in an enterprise application.
 

Objectives


 

Audience

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

Prerequisites

    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.
     

Topics

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
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