Added customization of GrpcTransport to JUnit4 & JUnit5 support

[alex268]

No description provided.

[Copilot]

Pull request overview

This PR adds a GrpcTransport customization hook across the test helper stack so JUnit4 rules and JUnit5 extensions can create transports with caller-provided GrpcTransportBuilder tweaks (e.g., application name), and updates integration tests/mocks accordingly.

Changes:

• Introduces YdbHelper.TransportCustomizer and a new createTransport(TransportCustomizer) path used by helper factories.
• Adds withGrpcTransportCustomizer(...) to JUnit4 GrpcTransportRule and JUnit5 GrpcTransportExtension.
• Updates integration tests and GrpcTransportMock to cover/customize transport builder options.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
tests/junit5-support/src/main/java/tech/ydb/test/junit5/GrpcTransportExtension.java	Adds extension-level transport customizer plumbing into helper transport creation.
tests/junit4-support/src/main/java/tech/ydb/test/junit4/GrpcTransportRule.java	Adds rule-level transport customizer plumbing into helper transport creation.
tests/common/src/main/java/tech/ydb/test/integration/YdbHelper.java	Defines TransportCustomizer and adds a customizable createTransport(...) API surface.
tests/common/src/main/java/tech/ydb/test/integration/docker/DockerHelperFactory.java	Applies the customizer to the GrpcTransportBuilder when creating transports.
tests/common/src/main/java/tech/ydb/test/integration/docker/ProxedDockerHelperFactory.java	Applies the customizer to the GrpcTransportBuilder in proxied docker setup.
tests/common/src/main/java/tech/ydb/test/integration/external/ExternalHelperFactory.java	Applies the customizer after auth/TLS builder configuration.
tests/common/src/main/java/tech/ydb/test/integration/utils/ProxyYdbHelper.java	Proxies the new createTransport(TransportCustomizer) method.
tests/common/src/test/java/tech/ydb/test/integration/YdbHelperFactoryTest.java	Adds test coverage for transport customization via helper factory.
tests/common/src/test/java/tech/ydb/test/integration/ProxyDockerTest.java	Adds test coverage for customization in proxied docker scenario.
tests/common/src/test/java/tech/ydb/test/integration/GrpcTransportMock.java	Extends builder mocking to support new builder calls used by customizers.
tests/common/src/test/java/tech/ydb/test/integration/DockerHelperFactoryTest.java	Updates one test to exercise the customizable transport creation.

Comments suppressed due to low confidence (1)

tests/junit4-support/src/main/java/tech/ydb/test/junit4/GrpcTransportRule.java:74

• proxy.set(null) is only executed if base.evaluate() completes normally. If the test throws, the rule will leave the proxy pointing at a (soon-to-be closed) transport, which can leak into later assertions or error handling. Move the proxy cleanup into a finally (set before evaluate, clear in finally) so it always resets even on failures.

                try (YdbHelper helper = factory.createHelper()) {
                    try (GrpcTransport transport = helper.createTransport(customizer)) {
                        proxy.set(transport);
                        base.evaluate();
                        proxy.set(null);
                    }

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 87.50000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.62%. Comparing base (545de5e) to head (50fedc4).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...main/java/tech/ydb/test/integration/YdbHelper.java	0.00%	1 Missing ⚠️
...ech/ydb/test/integration/utils/ProxyYdbHelper.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #636      +/-   ##
============================================
+ Coverage     70.58%   70.62%   +0.04%     
- Complexity     3291     3292       +1     
============================================
  Files           371      372       +1     
  Lines         15628    15640      +12     
  Branches       1635     1638       +3     
============================================
+ Hits          11031    11046      +15     
+ Misses         3944     3943       -1     
+ Partials        653      651       -2     

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