Spring Boot Test Context Config

In this tutorial, you'll learn about Fix Spring Boot Test Context Configuration Not Loading. We cover key concepts, practical examples, and best practices.

The Problem

@SpringBootTest does not load the expected configuration.

Quick Fix

Specify main class

Wrong:

@SpringBootTest
// Classes not specified

Output:

Wrong config loaded

Right:

@SpringBootTest(classes = MyApplication.class)

Output:

Correct config loaded

Use @TestConfiguration

Wrong:

// Test beans not defined

Output:

No test-specific beans

Right:

@TestConfiguration
public class TestConfig {
    @Bean
    public MyService myService() { return new MockMyService(); }
}

Output:

Test beans available

Set active profile

Wrong:

// No profile set

Output:

Wrong environment

Right:

@ActiveProfiles("test")
class ServiceTest { }

Output:

Test profile active

Prevention

• Ensure test package matches main package
• Use @SpringBootTest(classes=...) to specify the main class
• Use @TestConfiguration for additional beans

Common Mistakes with boot test context config

1. Using foldl instead of foldl' causing stack overflow on large lists
2. Forgetting deriving (Show, Eq) on custom data types needed for debugging
3. Placing the wildcard pattern first in case expressions, making all subsequent patterns unreachable

These mistakes appear frequently in real-world SPRING code. DodaTech's contributors have identified these patterns through analysis of open-source projects and production systems.

Practice Exercise

Write a pure function that safely divides two integers using Maybe, then test it with edge cases like division by zero and negative numbers.

This exercise reinforces the concepts covered in this guide. Try implementing it before checking online solutions.

FAQ

This quick fix is part of the DodaTech Spring & JVM ecosystem series. Built by the developers of Doda Browser, DodaZIP, and Durga Antivirus Pro.