Quarkus Test

In this tutorial, you'll learn about Fix Quarkus Test Not Starting. We cover key concepts, practical examples, and best practices.

The Problem

@QuarkusTest fails to start the application context with deployment errors.

Quick Fix

Use @QuarkusTest

Wrong:

@Test
public class ProductTest { } // No annotation

Output:

Context not started

Right:

@QuarkusTest
public class ProductTest {
    @Test
    public void testEndpoint() { }
}

Output:

Context started

Use @TestHTTPEndpoint

Wrong:

@QuarkusTest
public class ProductTest {
    @Test
    public void testGet() {
        given().when().get("/api/products").then().statusCode(200);
    }
}

Output:

Works

Right:

@TestHTTPEndpoint(ProductResource.class)
public class ProductTest {
    @Test
    public void testGet() {
        given().when().get().then().statusCode(200);
    }
}

Output:

Simpler endpoint calls

Configure test profile

Wrong:

// No profile
@QuarkusTest
public class ProductTest { }

Output:

Uses default config

Right:

@TestProfile(MyTestProfile.class)
@QuarkusTest
public class ProductTest { }

Output:

Test-specific configuration

Prevention

• Use @QuarkusTest for integration tests
• Use @TestHTTPEndpoint for cleaner REST tests
• Use @TestProfile for test-specific configurations

Common Mistakes with test

1. Overlapping type class instances that cause GHC to reject the program with ambiguous dispatch errors
2. Non-exhaustive pattern matches that compile with warnings then crash at runtime
3. Misunderstanding that String is [Char] with poor performance for large text operations

These mistakes appear frequently in real-world QUARKUS 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.