tests: runtime: out_http: push JSON format records together

[edsiper]

Problem

flb-rt-out_http fails intermittently in the unit test workflow, on master
and on pull requests, always in the same place:

Test format_json_stream...                      [ FAILED ]
  out_http.c:91: Check message == NULL... failed
    formatter output did not contain an expected string

The JSON format cases push their two records with two flb_lib_push() calls.
in_lib appends each read on its own, so when a flush runs between the
pushes the records land in separate chunks. The formatter then runs once per
record, and neither call contains both records, which is what the check
expects. Under parallel ctest load this happens often enough to fail CI.
format_json and format_json_lines have the same race.

Change

Push both records in a single flb_lib_push() in the three JSON format
cases. They are appended to the same chunk and formatted together. The
expected output and the checks are unchanged.

#12582 changes the same test to accept records spread across formatter calls.
This change keeps the check that both records are formatted together, and
also covers format_json and format_json_lines.

Testing

• flb-rt-out_http: all 15 cases pass (FLB_TEST_HTTP_PORT set locally
  because port 8888 is in use on the test machine).
• The three JSON cases ran 40 times as 8 parallel processes with no failure.
• The three JSON cases are clean under Valgrind.

Summary by CodeRabbit

• Tests
  • Updated JSON, JSON-stream, and JSON-lines formatter tests to verify that multiple records submitted together appear in the expected output.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-17T20:43:53.882823Z	da9e04a	PR opened

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ℹ️ Recent review info

⚙️ Run configuration

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• Plan: Advanced
• Run ID: ca688446-304e-4131-87d5-1fdc4c64f584

📥 Commits

Reviewing files that changed from the base of the PR and between f5374f7 and da9e04a.

📒 Files selected for processing: 1

• tests/runtime/out_http.c

Included review availability: This review used your included allowance. Your plan provides up to 8 included reviews per hour; 3 remain after this review.

📝 Walkthrough

The JSON, JSON-stream, and JSON-lines formatter tests now submit two records through one flb_lib_push call. Their expected outputs still include both records.

Changes: HTTP formatter tests

Layer / File(s)	Summary
Submit formatter records in one push tests/runtime/out_http.c	Each formatter test combines two records into one input buffer and submits them with one flb_lib_push call. Expected output and existing wait and output-count checks remain.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to da9e0

The change batches inputs in three formatter tests while retaining their two-record checks; no merge-blocking risk is apparent.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: updating the out_http runtime tests to push JSON format records together.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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