Test Driven Development (TDD) and Unit Testing / JUnit Essentials (TT3503)

Course Objectives

Throughout the course, you’ll work on a project with labs specifically oriented towards using TDD to implement a complex and multi-faceted web application that uses a database in its final form. Working in a hands-on learning enviroment you'll explore:

• The role of Unit Testing in software development and testing
• How to write effective Unit Testing
• The properties of effective unit tests
• The benefits of the test-first and Test-Driven Development
• Techniques and practices to aid in the successful adoption of Test-Driven Development
• JUnit and the JUnit Test Runner interface.
• How to use JUnit to drive the implementation of Java code.
• The role of debugging when done in conjunction with tests.
• The fundamentals of the TDD using Java, as well as its importance, uses, strengths and weaknesses.
• Understand how JUnit affects your perspective on development and increases your focus on a task.
• Good JUnit coding style.
• How to Create well-structured JUnit programs.
• How to Compile and execute programs using JUnit and DBUnit
• How to extend testing with mock objects using Mockito.
• Refactoring techniques available to make code as reusable/robust as possible.
• Various testing techniques.

Need different skills or topics?  If your team requires different topics or tools, additional skills or custom approach, this course may be further adjusted to accommodate.  We offer additional unit testing, TDD, BDD, programming, testing tools, test automation, QA, services, security and other related topics that may be blended with this course for a track that best suits your needs. Our team will collaborate with you to understand your needs and will target the course to focus on your specific learning objectives and goals.

Course Prerequisites

This programming course is for experienced Java developers. Please see the Related Courses tab for specific Pre-Requisite courses, Related Courses that offer similar skills or topics, and next-step Learning Path recommendations.

Follow On Courses:  Our TDD and programming tracks include a wide variety of follow-on courses and learning paths for leveraging Java for next-level development, testing, security and more. Please see our Java Developer Training Suite & Learning Paths or Testing, TDD, Test Automation, Unit Testing & Web Testing Tools (Selenium, Gherkin, Cucumber) Suite of courses, or inquire for recommendations based on your specific role and goals.

Course Agenda

Please note that this list of topics is based on our standard course offering, evolved from typical industry uses and trends. We’ll work with you to tune this course and level of coverage to target the skills you need most.

Session: Introducing Test-driven Development

Lesson: Test-Driven Development

• Rationale for TDD
• The process of TDD
• Advantages to TDD
• Side-effects of TDD
• Tools to support TDD
• Tutorial: Setup IntelliJ for Using Maven OR Using Eclipse Tutorial

Session: Unit Testing using JUnit

Lesson: Unit Testing Fundamentals

• Purpose of Unit Testing
• Good Unit Tests
• Test Stages
• Unit Testing Vs Integration Testing
• Understanding Unit Testing Frameworks

Lesson: Jumpstart: JUnit 5.x

• Understand and work with the features of JUnit
• Write unit tests using @Test annotation
• Test Result Verification (Assertions)
• Manage fixtures using @BeforeEach, @AfterEach, @BeforeAll and @AfterAll annotations
• Maven setup using Surefire plugin
• Lab: Demo JUnit
• Lab: Build JUnit Case Study
• Lab: Jumpstart JUnit

Lesson: Annotations

• Use @DisplayName to specify a custom name for the test
• Check for exceptions thrown by test
• Use @Disabled to prevent a test class or method from running
• Use timeouts to fail test that take longer than required
• Test Execution Order
• Lab: Working with @Test Annotation

Lesson: Hamcrest

• Learn the notation of assertThat
• Know the objective of Hamcrest library
• Use Hamcrest's logical and object matchers
• Use Hamcrest's number and collection matchers
• Lab: Working with Hamcrest

Lesson: Parameterized Tests

• The @ParameterizedTest annotation
• A parameterized test to test code under several conditions
• Define different sources for test data (@ValueSource, @CsvSource, @CsvFileSource,@EnumSource, @MethodSource, @ArgumentSource)
• Lab: Working with Parameterized Tests

Lesson: Advanced Features

• JUnit 4 vs JUnit 5
• Nested Unit Tests
• Repeated Tests
• JUnit Extensions
• ExecutionConditions
• Lambda Support
• Grouped Assertions
• Lab: Working with  Advanced Features

Lesson: JUnit Best Practices

• "Good" Tests
• Bad Smell
• White-Box Unit Testing
• Black-Box Unit Testing
• Automation and Coverage

Session: Mocking

Lesson: Mocking of Components

• Why We use Test Dummies
• Mock Objects
• Working with Mock Objects
• Using Mocks with the User Interface
• Mock Object Strategies

Lesson: Mock Objects and Mockito

• Mockito Description and Features
• Mockito Object Lifecycle
• JUnit 5 and Mockito Dependency Injection
• Stubs Using ArgumentMatchers
• Verifying Behavior in Mockito
• Partial Mock Objects
• The Spy annotation
• Lab: Mock Object and Mockito

Lesson: PowerMock

• PowerMock Description and Features
• Using PowerMockito
• @PrepareForTest
• Mocking a final class or final method
• Mocking a Static Method

Session: Advanced Topics

Lesson: State-based vs. Interaction-based Testing

• State-based Testing
• Interaction-based Testing
• Mock Objects Support Each Approach
• Three Areas to Check in a Test
• Lab: Interaction-based Testing

Lesson: Improving Code Quality Through Refactoring

• Refactoring Overview
• Refactoring and Testing
• Refactoring to Design Patterns
• Lab: Refactoring
• Lab: Best Practices - Refactoring Tests

Lesson: Database Testing: DbUnit

• Setting up DbUnit
• Defining a Dataset File in XML, CSV or Excel
• Writing a DbUnit Test Class
• Assert the results
• Use the FailureHandler and ValueComparer
• Using Date and Time in test sets
• Export a data set
• Lab: Introduction to DbUnit
• Lab: DbUnit Assertions
• Lab (OPTIONAL): Selenium and DbUnit

Course Materials

Student Materials: Each participant will receive a digital Student Guide and/or Course Notes, code samples, software tutorials, step-by-step written lab instructions (as applicable), diagrams and related reference materials and resource links. Students will also receive the project files (or code, if applicable) and solutions required for the hands-on work.

Hands-On Setup Made Simple! Our dedicated tech team will work with you to ensure our ‘easy-access’ cloud-based course environment, or local installation, is accessible, fully-tested and verified as ready to go well in advance of the course start date, ensuring a smooth start to class and effective learning experience for all participants. In some cases we can also help you install this course locally if preferred. Please inquire for details and options.

Every-Course Extras = High-Value & Long-Term Learning Support! All Public Schedule courses include our unique EveryCourse Extras package (Course Recordings, Live Instructor Follow-on Support, Free *Live* Course Refresh Re-Takes, early access to Special Offers, Free Courses & more). Please inquire for details.