Spring Core Testing

Getting started with Spring Core Testing framework

Using @ContextConfiguration Annotation

@SpringJunitConfig Example

Using @ActiveProfiles to load a specific profile in a JUnit test.

ActiveProfilesResolver example.

Demonstrates how inheritProfiles merges or replaces profiles in Spring tests.

Demonstrates how @ActiveProfiles behaves in JUnit 5 @Nested test classes with inheritance enabled/disabled.

Create custom composed annotations that include @ActiveProfiles to avoid duplication across tests.

Use @ActiveProfiles in tests to activate stub beans via @Profile and swap real implementations without mocks.

Using @TestPropertySource to load specific properties files in a JUnit test.

Using @TestPropertySource with properties attribute to .

How to use @TestPropertySource to load properties from default location?

Learn how the Spring TestContext framework automatically detects static nested @Configuration classes when the classes attribute is omitted from @ContextConfiguration.

Learn how to share or isolate Spring ApplicationContexts between outer and inner JUnit 5 @Nested test classes.

Learn how Spring Test ContextCustomizer and ContextCustomizerFactory customize the ApplicationContext lifecycle.

Learn how to customize Spring ApplicationContext during testing using ContextCustomizer.

Understanding tests context configuration inheritance.

Using @ContextConfiguration initializers to initialize the context for tests.

What is TestExecutionListener? How can we use it?