Micronaut Test Resources

Transcript

1. Micronaut Test Resources
   Automatic test resources provisioning
   for your Micronaut applications
   Cédric Champeau
   Micronaut, Oracle Labs
   @melix@mastodon.xyz
   @CedricChampeau
   Copyright © 23-1-19, Oracle and/or its affiliates
   Micronaut® is a registered trademark of Object Computing, Inc. Use is for referential purposes and does not
   imply any endorsement or affiliation with any third-party product. Unauthorized use is strictly prohibited.
   

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2. - Working at Oracle Labs on Micronaut
   Main focus on build plugins and dev
   productivitity
   - Formerly working at Gradle Inc
   - Author of static compiler of Groovy
   - Amateur astronomer
   @melix@mastodon.xyz
   https://www.astrobin.com/users/melix/
   https://bit.ly/3eGD0GM (Youtube)
   About me
   Copyright © 2022, Oracle and/or its affiliates
   micronaut.io github.com/micronaut-projects/micronaut-core
   

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3. - Micronaut is focused on modern architectures
   like Serverless and Microservices
   - Also a complete framework for any type of
   application
   - Lightweight, reactive (HTTP Client/Server
   based on Netty)
   - Annotation processor to compute framework
   infrastructure at compile time
   Micronaut
   Copyright © 2022, Oracle and/or its affiliates
   micronaut.io github.com/micronaut-projects/micronaut-core
   

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4. Micronaut computes:
   - All dependency & configuration injection
   - Annotation metadata, meta-annotations
   - AOP proxies
   - Bean introspections
   - And all other framework infrastructure
   - Reflection, runtime proxy, and dynamic
   classloader free
   Micronaut = Build Time Framework Infrastructure
   Copyright © 2022, Oracle and/or its affiliates
   micronaut.io github.com/micronaut-projects/micronaut-core
   

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5. High-performance JDK distribution
   Increases application throughput, reduces
   latency, reduces memory use
   Graal just-in-time (JIT) compiler that runs on top
   of HotSpot, written in Java
   native-image ahead-of-time (AoT) compiler
   compiles Java applications into small self-
   contained native binaries
   Micronaut = Build Time Framework Infrastructure
   Copyright © 2022, Oracle and/or its affiliates
   graalvm.org github.com/graalvm/graalvm-demos
   oracle.com/graalvm
   

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6. Micronaut + GraalVM Native Image are a match
   made in heaven
   Less work to configure Native Image because
   Micronaut eliminates reflection, runtime
   proxies, bytecode generation and dynamic
   classloading
   Startup time 20ms and Memory Consumption
   18MB!
   Micronaut GraalVM
   ♥️
   Copyright © 2022, Oracle and/or its affiliates
   graalvm.org github.com/graalvm/graalvm-demos
   oracle.com/graalvm
   ♥️
   

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7. - New in Micronaut 3.6
   - Simplifies setup of tests
   - eg. spawn a database container, a Kafka
   server, …
   - Compatible with native executables
   - Extensible
   Micronaut Test Resources
   Copyright © 2022, Oracle and/or its affiliates
   micronaut.io github.com/micronaut-projects/micronaut-core
   

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8. Copyright © 2022, Oracle and/or its affiliates | Confidential: Internal/Restricted/Highly Restricted
   8
   

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9. Micronaut Test Resources
   Copyright © 2022, Oracle and/or its affiliates
   Demo 1 : Micronaut Data JDBC + Test Resources
   micronaut.io github.com/micronaut-projects/micronaut-core
   

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10. ●
    ./gradlew test → spawns test resources
    ●
    ./gradlew run → also spawns test resources
    ●
    ./gradlew -t test (or run) → keeps tests resources alive
    ●
    ./gradlew startTestResourcesService → test resources outlive the build
    ●
    ./gradlew nativeTest
    • Builds a native image which can connect to test resources service
    • Runs tests against the test resources
    Micronaut Test Resources
    micronaut.io github.com/micronaut-projects/micronaut-core
    

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11. Micronaut Test Resources
    Copyright © 2022, Oracle and/or its affiliates
    Demo 2 : Micronaut MQTT + Test Resources
    micronaut.io github.com/micronaut-projects/micronaut-core
    

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12. ●
    Supports test resources service cross-project
    • Two independent “Git” repositories can share resources
    • Or in simpler use cases, different modules of same repository
    ●
    Supports test resources service cross-build tools!
    • e.g, producer built with Maven and consumer built with Gradle
    Micronaut Test Resources
    micronaut.io github.com/micronaut-projects/micronaut-core
    

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13. Micronaut Test Resources
    Copyright © 2022, Oracle and/or its affiliates
    Demo 3 : Micronaut Email + Test Resources
    micronaut.io github.com/micronaut-projects/micronaut-core
    

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14. ●
    Supports conventional way to declare new resources
    Micronaut Test Resources
    test-resources:
    containers:
    fakesmtp:
    image-name: ghusta/fakesmtp
    hostnames:
    - smtp.host
    exposed-ports:
    - smtp.port: 25
    

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15. Micronaut Test Resources
    Copyright © 2022, Oracle and/or its affiliates
    Demo 4 : Custom Test Resources
    micronaut.io github.com/micronaut-projects/micronaut-core
    

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16. ●
    Supports completely adhoc test resources
    Micronaut Test Resources
    public class MyTestResource implements TestResourcesResolver {
    public static final String MY_TEST_PROPERTY = "my.user.name";
    @Override
    public List getResolvableProperties(Map> propertyEntries, Map testResourcesConfig) {
    return Collections.singletonList(MY_TEST_PROPERTY);
    }
    @Override
    public Optional resolve(String propertyName, Map properties, Map testResourcesConfiguration) {
    if (MY_TEST_PROPERTY.equals(propertyName)) {
    return Optional.of("world");
    }
    return Optional.empty();
    }
    }
    

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17. ●
    Supports both JDBC and R2DBC
    • PostgreSQL
    • MySQL/MariaDB
    • Oracle XE
    • Microsoft SQL Server
    ●
    Container based resources
    • Elasticsearch
    • Kafka
    • MongoDB
    • MQTT (HiveMQ, RabbitMQ)
    • Neo4J
    • Redis
    • Hashicorp Vault
    Micronaut Test Resources : conclusion
    

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18. ●
    Generic Testcontainers support
    • Expose your own container via conventional properties
    • Allows mounting local files, etc.
    ●
    Generic test resources support
    • Implement your own!
    ●
    Compatible with native images
    • Isolates your application code from test resources
    • Native binary connects to remote service
    Micronaut Test Resources : conclusion
    

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19. ●
    Micronaut Launch : https://micronaut.io/launch
    ●
    Micronaut Project: https://micronaut.io/
    ●
    Micronaut Test Resources: https://github.com/micronaut-projects/micronaut-test-resources
    Slides coming @melix@mastodon.xyz
    Micronaut Test Resources : resources
    

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