Testing

Creating and running tests for your code.

You can use IntelliJ IDEA to help you create and run tests across your project.

Marco Codes - Hibernate & JPA Tutorial

Crash course in Hibernate and JPA

Merge/Unmerge If Statements

Experiment with your code without changing the semantics

Marco Codes - JUnit 5

JUnit 5 Nice n Easy

Using the Terminal in IntelliJ IDEA

IntelliJ IDEA has a built-in terminal that you can use to perform a number of functions inside your IDE

Migrating JUnit 4 to JUnit 5

Migrating your JUnit 4 test suite to JUnit 5

Generate a Test Class

Generate a new test class from your Java class

Generate Test Methods

Generate a test method in your Test class

Writing Tests with Spock

Learn about the Spock testing framework by creating a project that uses Spock to unit test Java code

Data Pipes

Often we want to test the same set of criteria with different sets of data. Data pipes is one mechanism to do this.

Data Tables

Data tables offer the same functionality as data pipes, but this syntax can sometimes be more readable for more complex sets of data.

Expecting Exceptions

Tests don't check just the happy paths, sometimes we want to say we're expecting a specific Exception.

Given, When and Then

See how Spock tests are usually structured.

Mocks

Mocks are a useful testing tool. We can provide "empty" objects, so we don't have to initialise the whole application to test a section, and we can use mocks to check our code is making the calls we expect.

Setting up the Dependencies

Add Spock framework dependencies to the project

Setup and Teardown

See how to set up, or clean up, test classes and methods in Spock.

Stubs

Stub objects allow us to state from a test what values get injected into our application code. They can provide simple interfaces, so we don't have to initialise the whole application to test a section.