Philipp Krenn @xeraa Real Integrat- ion Tests with Infrastructure - - PowerPoint PPT Presentation

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Philipp Krenn @xeraa Real Integrat- ion Tests with Infrastructure - - PowerPoint PPT Presentation

Feb 04, 2024 251 likes •757 views

Philipp Krenn @xeraa Real Integrat- ion Tests with Infrastructure | Developer Integration Tests But the unit tests passed, so... https://twitter.com/Aaronius/status/ 933497253347463168 Mocking Mockito, EasyMock, JMock,... Ich

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Philipp Krenn @xeraa Real Integrat-ion Tests with

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Infrastructure | Developer

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Integration Tests

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But the unit tests passed, so...

https://twitter.com/Aaronius/status/ 933497253347463168

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Mocking

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Mockito, EasyMock, JMock,...

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Ich mock mir die Welt widdewidde wie sie mir gefällt

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! Unit tests, systems not under your control ! Test real datastore

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In-Memory

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H2, HSQLDB, Apache Derby,...

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Embedded Elasticsearch unsupported in 5.0+

https://www.elastic.co/blog/elasticsearch-the-server

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! Often good enough ! Test real datastore, supported systems

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Actual Datastore

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Local installation Docker container Cloud

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Demo

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! "Good old approach" ! External dependency, parallelization

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In-Process

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de.flapdoodle. embed.process

https://github.com/flapdoodle-oss/ de.flapdoodle.embed.process

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...will provide a platform neutral way for running processes in unittests.

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→ MongoDB de.flapdoodle.embed.mongo → Redis de.flapdoodle.de.embed.redis → Memcached de.flapdoodle.embed.memcached → PostgreSQL ru.yandex.qatools.embed → MySQL com.wix.mysql → Consul com.github.golovnin.embedded.consul → Vault com.github.golovnin.embedded.vault → InfluxDB io.apisense.embed.influx

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Build Tool

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docker-maven-plugin

http://dmp.fabric8.io

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Build image: docker:build Run container:

docker:start & docker:stop

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Dockerfile or Docker assembly

<build> <from>java:8</from> <assembly> <descriptor>docker-assembly.xml</descriptor> </assembly> <cmd> <shell>java -jar /maven/service.jar</shell> </cmd> </build>

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Demo

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maven-failsafe-plugin

https://maven.apache.org/surefire/maven-failsafe-plugin/

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! Plain or custom Docker image ! One instance for all tests

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Testcontainers

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Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases [...] that can run in a Docker container.

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Dependency

@ClassRule public static GenericContainer redis = new GenericContainer("redis:3.0.2") .withExposedPorts(6379);

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testcontainers-java- module-elasticsearch

https://github.com/dadoonet/testcontainers-java-module- elasticsearch

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Demo

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Todo

Set (randomized) port

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! Container per test

Or reuse in static block

! Custom integration

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Conclusion

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Why Integration Tests

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Why not Mocking In-Memory Actual Datastore

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How In-Process Build Tool Testcontainers

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Code

https://github.com/xeraa/integration- test-demo

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Questions?

Philipp Krenn@xeraa