Test Automation
Gradle Testing Tasks and Test Reports: A Complete Guide
Gradle's test task orchestrates JVM test execution with fine-grained control over filtering, parallelism, JVM configuration, and reporting.
Java
Latest
Test Automation
Geb Browser Automation Testing with Groovy: A Practical Guide
Geb is a browser automation library for Groovy that combines WebDriver's power with a jQuery-inspired content DSL and Groovy's concise syntax.
Test Automation
Jazzer: Coverage-Guided Java/JVM Fuzzing in CI Pipelines
Java has a reputation for safety — garbage collection eliminates entire classes of memory bugs, strong typing prevents many type errors, and the JVM sandboxes execution. But Java applications can still have serious bugs: path traversal vulnerabilities in file handling, deserialization exploits, XML/JSON parsing crashes, SQL injection through improperly sanitized
Spring Boot
Spring WebFlux Testing: WebTestClient, StepVerifier, and Reactive Repositories
Reactive programming introduces a fundamentally different execution model — asynchronous, non-blocking, event-driven — and testing it requires a different mindset. You can't just call a method and check the return value; you need to subscribe to a stream, assert on emitted items, verify completion signals, and handle errors
Spring Boot
Spring Cloud Gateway Testing: Route Validation, Filter Testing, and WireMock Contracts
An API gateway is the front door to your microservices architecture. Every request passes through it — authentication checks, rate limiting, request transformation, circuit breaking, routing. If the gateway misbehaves, every service behind it is affected. Yet gateways are frequently undertested because developers assume the framework handles everything correctly, and testing
Spring Boot
Spring Batch Testing: JobLauncherTestUtils, Step-Scoped Beans, and Chunk Processing
Batch jobs process the most sensitive and voluminous data in many enterprise applications — billing runs, ETL pipelines, report generation, data migrations.
Testing
MinIO Testing Guide: Self-Hosted S3-Compatible Storage Testing with TestContainers
MinIO is an S3-compatible object storage server you can run locally or in production. Testing it properly means running a real MinIO instance — TestContainers makes this easy in both Java and Python by spinning up a MinIO Docker container per test suite and tearing it down automatically. Key Takeaways
Testing
Apache Pulsar Functions Testing: Unit Tests, Mocks, and Multi-Tenant Scenarios
Apache Pulsar Functions are lightweight compute units that transform or route messages — they're easy to unit-test because the Pulsar team provides a MockContext that eliminates the broker dependency. Stateful functions need state store tests. Multi-tenant applications need namespace isolation tests. Schema evolution tests prevent production data
Testing
Kafka Streams Testing: TopologyTestDriver and Stateful Stream Processors
Kafka Streams provides a TopologyTestDriver that runs your entire stream processing topology in-process — no Kafka cluster needed. You pipe records in through TestInputTopic, read results from TestOutputTopic, and advance wall-clock time programmatically to test windowed aggregations. For Schema Registry integration, use MockSchemaRegistryClient to avoid hitting a real registry.
Java
Testing Quarkus REST Services with @QuarkusTest and RestAssured
Quarkus has become one of the most compelling Java frameworks for building cloud-native microservices.
Java
Testing Vert.x Async Applications with VertxExtension
Testing asynchronous code is notoriously tricky. When your application is built on Vert.x — a reactive toolkit where everything happens on an event loop — standard synchronous JUnit assertions don't work. You need to tell JUnit to wait for asynchronous operations to complete before asserting results. The Vert.x
Java
Micronaut Test: @MicronautTest, Testcontainers, and MockBean
Micronaut's ahead-of-time (AOT) compilation model eliminates reflection-based dependency injection, producing applications that start in milliseconds.