tests: internal: Disable cumulative delta case on Windows because of unistd.h

[cosmo0920]

Windows does not have unistd.h.

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Fluent Bit is licensed under Apache 2.0, by submitting this pull request I understand that this code will be released under the terms of that license.

Summary by CodeRabbit

• Tests
  • Restricts certain unit tests and related integration wiring to non-Windows platforms, ensuring platform-specific test compilation and plugin integration occur only where supported.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

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Run ID: a0362bc2-ba5c-4189-a4f5-39a733b7a699

📥 Commits

Reviewing files that changed from the base of the PR and between d1009ea and 91eb773.

📒 Files selected for processing (1)

• tests/internal/CMakeLists.txt

🚧 Files skipped from review as they are similar to previous changes (1)

• tests/internal/CMakeLists.txt

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📝 Walkthrough

Walkthrough

The CMake build for tests (tests/internal/CMakeLists.txt) was changed so cumulative_to_delta.c and the cumulative-to-delta plugin/core integration are only included when FLB_METRICS and FLB_PROCESSOR_CUMULATIVE_TO_DELTA are enabled and the platform is not Windows (NOT WIN32).

Changes

Cohort / File(s)	Summary
Build Configuration tests/internal/CMakeLists.txt	Guard inclusion of cumulative_to_delta.c and the flb-it-cumulative_to_delta plugin/core wiring with NOT WIN32 in addition to existing FLB_METRICS and FLB_PROCESSOR_CUMULATIVE_TO_DELTA checks; removes Windows participation in those builds.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Suggested reviewers

• edsiper
• niedbalski
• patrick-stephens

Poem

🐰 I hopped through CMake, light and spry,
I tucked a Windows check close by,
Metrics run where they should play,
Windows waits another day,
Hooray for builds that now comply!

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: disabling the cumulative delta test case on Windows due to unistd.h unavailability.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch cosmo0920-disable-cumulative-delta-internal-test-case

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• Generate coding plan for human review comments

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[chatgpt-codex-connector]

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Reviewed commit: d1009ead47

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[chatgpt-codex-connector]

Guard the flb-it-cumulative_to_delta setup when skipping it

On Windows with FLB_METRICS=ON and the default FLB_PROCESSOR_CUMULATIVE_TO_DELTA=ON, this removes cumulative_to_delta.c from UNIT_TESTS_FILES, so prepare_unit_tests() never creates flb-it-cumulative_to_delta (tests/internal/CMakeLists.txt:222-263). The unconditional block at lines 265-274 still calls target_sources()/target_include_directories() for that target, and cmake --help-command target_sources requires the target to have been created by add_executable()/add_library(). In a minimal repro, CMake errors with Cannot specify sources for target ... which is not built by this project., so Windows internal-test configurations now fail at configure time instead of just skipping this test.

Useful? React with 👍 / 👎.

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@tests/internal/CMakeLists.txt`:
- Around line 122-128: The CMake configuration unconditionally references the
target flb-it-cumulative_to_delta when FLB_METRICS AND
FLB_PROCESSOR_CUMULATIVE_TO_DELTA, but that target is only added on non-Windows
platforms; wrap the block that configures/links/sets properties for
flb-it-cumulative_to_delta with the same NOT WIN32 guard used when adding
cumulative_to_delta.c so the target is only referenced when it exists (i.e.,
place the existing conditional around the configuration code that runs under the
FLB_METRICS AND FLB_PROCESSOR_CUMULATIVE_TO_DELTA check).

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 66dacaeb-b7c4-48a9-84c6-66bbde92c877

📥 Commits

Reviewing files that changed from the base of the PR and between d257e00 and d1009ea.

📒 Files selected for processing (1)

• tests/internal/CMakeLists.txt

[mabrarov]

Hi @cosmo0920,

Here is another solution (because CMetrics supports Windows) of the same issue: #11589.

Thank you.

[cosmo0920]

This PR is superseded by #11589.