Add integration test for OTLP exporters

[TommyCpp]

In order to increase our confidence when releasing a new version. We should have integration tests for important exporters(OTLP, jager, etc).

Currently we have limited integration test for jaeger, and CI setup to run integration tests on PRs. But we want to expand/move it to OTLP exporters

[hdost]

Maybe consider using https://docs.rs/testcontainers/latest/testcontainers/ for starting the container. https://github.com/open-telemetry/opentelemetry-java/blob/main/integration-tests/otlp/src/main/java/io/opentelemetry/integrationtest/OtlpExporterIntegrationTest.java This is the example from the Java repo.

[cijothomas]

I also want to share my own experience that, leveraging In-MemoryExporter for intergration tests is another great way of improving confidence in the overall SDK! Yes, it is not true e2e, but does help a lot. Integration test for OTLP (as proposed in this issue), combined with in-memory exporter tests should be a good boost to coverage, and improve our velocity.

#1305

[TommyCpp]

I stump upon https://github.com/davidB/tracing-opentelemetry-instrumentation-sdk/tree/main/fake-opentelemetry-collector while looking at other issues. Looks like someone already built a fake opentelemetry collector 🤣

[hdost]

Are there any other Tests we want to add?
Maybe we can also add a daily/weekly build of the integration test?

[TommyCpp]

Maybe we can also add a daily/weekly build of the integration test?

yeah we could set something up but I want to extend the integration test coverage first

[hdost]

Maybe we can also add a daily/weekly build of the integration test?

yeah we could set something up but I want to extend the integration test coverage first

Which cases do you want to cover maybe we can split it up a bit.