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Add awaitility module: testing async @Async/@Scheduled/@KafkaListener code without Thread.sleep

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Covers replacing Thread.sleep with await() across a void @Async method, an
@EmbeddedKafka-backed @KafkaListener, and an already-running @Scheduled job;
verifies Awaitility 4.3.0's real defaults (10s timeout, 100ms poll interval)
and its default-uncaught-exception-handler swap directly against the jar;
and documents a real pom.xml trap where Boot 4.1.1 split Kafka's
autoconfiguration (spring-boot-kafka) out of spring-kafka itself, which
silently leaves @KafkaListener beans with no running container.
This commit is contained in:
Claude
2026-10-08 15:18:58 +00:00
parent 09631dcaab
commit a7b76243fa
31 changed files with 900 additions and 0 deletions
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awaitility/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<!-- Boot 4.1.1 manages Spring Framework 7.0.9, Spring Kafka 4.1.1 and Awaitility 4.3.0.
Versions were read from spring-boot-dependencies-4.1.1.pom and
spring-boot-starter-test-4.1.1.pom, not from release notes. -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>4.1.1</version>
<relativePath/>
</parent>
<groupId>com.ankurm</groupId>
<artifactId>awaitility</artifactId>
<version>1.0</version>
<packaging>jar</packaging>
<properties>
<java.version>25</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<!-- NOT org.springframework.kafka:spring-kafka directly, that was Boot 3.x's shape.
In Boot 4.1.1 the Kafka autoconfiguration classes (KafkaTemplate, ConsumerFactory,
the KafkaListenerEndpointRegistry that @KafkaListener needs) were extracted out of the
monolithic spring-boot-autoconfigure jar into their own module, org.springframework.boot
:spring-boot-kafka. Depending on spring-kafka alone now gets you the annotations and
KafkaTemplate class with none of the autoconfiguration wiring: every @KafkaListener bean
is created but no container ever starts, silently, with no error at context startup.
This starter is what actually pulls spring-boot-kafka (confirmed via its real POM on
Maven Central) in on top of spring-kafka itself. -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-kafka</artifactId>
</dependency>
<!-- No explicit <awaitility> dependency anywhere in this file. spring-boot-starter-test
4.1.1 already declares org.awaitility:awaitility:4.3.0 as a compile-scope dependency
of its own, confirmed against the real POM on Maven Central, not assumed. Every
project using this starter already has Awaitility on its test classpath today. -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- The test-scope sibling of spring-boot-starter-kafka above: pulls spring-kafka-test
(the @EmbeddedKafka JUnit 5 extension and KafkaTestUtils) on the same Boot-4.1.1-managed
version as everything else here. @EmbeddedKafka starts a real, in-process Kafka broker
for the duration of a test class, no Docker, no Testcontainers, no network port opened
outside this JVM, which is also why it is the only honest way to demonstrate Kafka
listener testing in a sandbox with no Docker daemon. -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-kafka-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>3.6.0</version>
</plugin>
</plugins>
</build>
</project>