When building secure applications, it’s essential to ensure your Spring Security configuration behaves exactly as expected. Whether it’s custom login, role-based access, or JWT filters — test
Spring Boot Testcontainers For Database Testing
Writing database tests that mimic real-world scenarios is crucial — but in-memory databases like H2 often fall short in simulating true production environments. This is where Testcontainers comes
Integration Testing with @SpringBootTest in Spring Boot
In a real-world Spring Boot application, it’s important to test how different components work together — services, controllers, repositories, and even security. This is where integration te
Spring Boot @DataJpaTest Testing : Services and Repo
Testing is a key aspect of building reliable and maintainable applications. In Spring Boot, @DataJpaTest is a specialized test slice that focuses on JPA components such as repositories and entity m
Introduction to MockMvc REST Controller Unit Testing
In the world of Spring Boot development, writing clean, testable, and maintainable code is key. Controllers are the entry point to your RESTful APIs and need to be thoroughly tested. That’s where
Spring Boot Application Testing : Introduction
Testing is a crucial aspect of any software development lifecycle. With Spring Boot, testing becomes easier thanks to its robust testing support out-of-the-box. In this post, we’ll cover the esse
Internationalization (i18n) in Spring Boot: A Complete Guide
In today’s globalized web applications, it’s crucial to support multiple languages to reach a wider audience. Spring Boot makes it easy to implement internationalization (i18n), allowing you to
Externalized Configuration with Vault and AWS Secrets Manager in Spring Boot
In cloud-native applications, storing sensitive information like API keys, database passwords, and access tokens in application.properties or application.yml is a security risk. To solve this, Spri
Property Binding using @ConfigurationProperties in Spring Boot
In Spring Boot, externalized configuration is one of its strongest features. Instead of hardcoding values, you can define them in property or YAML files. But injecting many @Value fields can quickl
Building Custom Starters in Spring Boot 3
Spring Boot is known for its opinionated auto-configuration and rapid setup capabilities. One of the hidden gems of its ecosystem is custom starters — reusable libraries that help you abstract co