Testing utilities for JS/TS services

[tillrohrmann]

In order to provide a good dev-ex, it would be great if we provided our users some testing utilities to easily test their services via unit and integration tests.

[slinkydeveloper]

In the Java SDK we have some testing utilities based on testcontainers. This is a sample usage: https://github.com/restatedev/sdk-java/blob/main/sdk-test/src/test/java/dev/restate/sdk/testing/CounterTest.java

We could replicate the same experience in the ts sdk using testcontainers-node

[tillrohrmann]

Would it possible to directly use test-containers w/o a wrapping framework? If so, could it become an example?

[slinkydeveloper]

Would it possible to directly use test-containers w/o a wrapping framework? If so, could it become an example?

Totally possible, the Java sdk-test module is just a thin wrapper that automates the port forwarding and the registration of the service, nothing more than that.

If so, could it become an example?

We can definitely start from that I believe, it will just look a bit manual at the beginning, but i guess it's fine.

[tillrohrmann]

An idea that came up was to publish our testcontainer image as an official testcontainers module.

[slinkydeveloper]

Some experiments: restatedev/node-template-generator#19

[slinkydeveloper]

Solved by adding an example.