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fix: handle internal error: tck failure#186

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nahapetyan-serob merged 4 commits intomainfrom
serob/internal-error-tck-failure
Feb 3, 2026
Merged

fix: handle internal error: tck failure#186
nahapetyan-serob merged 4 commits intomainfrom
serob/internal-error-tck-failure

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@nahapetyan-serob nahapetyan-serob commented Feb 3, 2026

The spec was unspecified, so the implementation restricts task continuation to TaskStateInputRequired. However, TCK tests expect continuation for any non-terminal state. Added an interceptor to the SUT agent so 2 of TCK tests would pass.

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Summary of Changes

Hello @nahapetyan-serob, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request resolves failures in two TCK (Technology Compatibility Kit) tests by introducing an interceptor within the System Under Test (SUT) agent. The core issue stems from a divergence between the project's internal task continuation logic, which is more restrictive, and the broader expectations of the TCK tests. The added interceptor specifically modifies the SUT agent's responses for certain test messages, ensuring these particular TCK tests pass without altering the underlying task state management.

Highlights

  • TCK Test Compatibility: An interceptor has been introduced in the System Under Test (SUT) agent to align its behavior with specific TCK test expectations regarding task continuation.
  • Discrepancy Resolution: This change addresses a divergence where the internal implementation restricts task continuation to TaskStateInputRequired, while certain TCK tests expect continuation for any non-terminal state.
  • Interceptor Logic: The new After method within the intercepter modifies responses for messages with IDs containing 'continuation' or 'test-history-message-', setting a generic 'Execution in progress' payload and clearing any errors to ensure TCK test passage.
Changelog
  • e2e/tck/sut.go
    • Imported the strings package.
    • Refactored the intercepter struct, removing its embedding of a2asrv.PassthroughCallInterceptor.
    • Introduced msgContextKeyType for context value keys.
    • Modified the Before method to safely extract MessageSendParams and store the message ID in the context for OnSendMessage calls.
    • Added an After method to the intercepter which, for specific message IDs (those containing 'continuation' or 'test-history-message-'), overrides the response payload with 'Execution in progress' and clears any associated error.
Activity
  • The pull request was authored by nahapetyan-serob.
  • The author provided a clear description outlining the problem (TCK failures due to spec/implementation mismatch) and the solution (adding an interceptor to the SUT agent).
  • No other review comments or activities have been recorded yet.
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Code Review

This pull request addresses a TCK failure by introducing an interceptor in the SUT agent. This interceptor specifically handles task continuation for non-terminal states, which was a gap in the previous implementation. The changes are well-contained within the test environment and the use of an interceptor is a clean way to inject this test-specific behavior. My feedback includes a suggestion to improve maintainability by replacing hardcoded strings with constants.

@nahapetyan-serob nahapetyan-serob merged commit b55fbfd into main Feb 3, 2026
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@nahapetyan-serob nahapetyan-serob deleted the serob/internal-error-tck-failure branch February 3, 2026 14:08
@a2a-bot a2a-bot mentioned this pull request Feb 3, 2026
Merged
yarolegovich pushed a commit that referenced this pull request Feb 23, 2026
@a2a-bot
chore(main): release 0.3.7 (#189)
c5ece7f 
🤖 I have created a release *beep* *boop*
---


## [0.3.7](v0.3.6...v0.3.7)
(2026-02-20)


### Features

* implement tasks/list RPC
([#210](#210))
([6e04698](6e04698))
* retry cancelations
([#222](#222))
([3057474](3057474))


### Bug Fixes

* handle internal error: tck failure
([#186](#186))
([b55fbfd](b55fbfd))
* **sse:** support data: prefix without space
([#188](#188))
([6657a6d](6657a6d)),
closes [#162](#162)

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).
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@yarolegovich yarolegovich yarolegovich approved these changes

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