pubsub-emulator-demo

Example Spring project showing how to use launch GCP emulator and test spring GCP pubsub in a test.

Key points:

• test-containers library is used to launch google-sdk docker container and start pubsub emulator inside it
• Tests are overridden to hit emulator via src/test/resources/test.properties by setting spring.cloud.gcp.pubsub-emulator-host: localhost:8085 (default emulator port)
• TestPubSubConfig is used to bring up pubsub emulator inside a docker container, create a topic and subscription in the emulator. This is using GCP SDK directly, not Spring pubsub, to create the resources.

Running locally

brew install maven
gcloud beta emulators pubsub env-init
gcloud beta emulators pubsub start --project=test
mvn test