Decouple integration tests from samples and support dynamic port allocation to enable parallel testing

[marsevilspirit]

Description

Currently, the integration tests in dubbo-go are tightly coupled with the samples. Most of these tests share a hardcoded port (e.g., 20000). This configuration leads to several bottlenecks:

1. Sequential Execution: Tests cannot run in parallel due to port conflicts.
2. Time Waste: After a test completes, the OS takes time (roughly 15s for TIME_WAIT) to fully release the port. Subsequent tests must wait for this period, or they will fail to bind the port.
3. CI Inefficiency: As the number of integration tests grows, the cumulative wait time becomes a significant overhead in our CI pipeline.

Motivation

By separating integration tests from samples and implementing a dynamic port allocation mechanism, we can:

• Eliminate the 15-second wait between test cases.
• Enable parallel execution of integration tests.
• Improve the stability of the CI environment by avoiding "address already in use" errors.

Expected Outcome

• Integration tests can be executed concurrently.
• Total CI execution time is significantly reduced.
• Developers can run the full test suite locally without manual port cleanup.

[maishivamhoo123]

@marsevilspirit sir can you please assign this issue to me ? I love to contribute to this issue.

[marsevilspirit]

@marsevilspirit sir can you please assign this issue to me ? I love to contribute to this issue.

If you have any questions, please feel free to ask.

[manvendra5345]

Hi @marsevilspirit,

I’m interested in working on this issue as part of GSoC. I’ve gone through the issue details and related code, and I’d love to take ownership and start contributing.

If it’s available, could you please assign this issue to me?

Thanks!

[maishivamhoo123]

@manvendra5345 Sorry, I’m currently working on this issue. Could you please choose another one? You should be able to find other suitable issues easily. Thanks!

[manvendra5345]

No problem.Could u just check your linkdin for a min.

[maishivamhoo123]

@marsevilspirit Sir, here is my plan:

Create a helper function to find an available free port.

Use that dynamic port in the integration tests to prevent conflicts.

Question regarding structure: I am planning to create a new folder, integration/utils, and place the port helper function there. Is this location okay?