[docs-patrol] Update integration testing docs for TestMain auto-build

[github-actions]

Recent code changes in the repository have introduced documentation drift. The following changes need corresponding documentation updates.

Changes Requiring Documentation Updates

1. Go integration tests now auto-build test binaries via TestMainWithBuild, but docs still require mage buildSystemTestBinary

Commit(s):

• 323f731 (link)

What changed:

• filebeat/magefile.go marks BuildSystemTestBinary as deprecated for Go integration tests and prints:
  • "The test binary is now built automatically via TestMain."
• Go integration tests now call integration.TestMainWithBuild(m, "filebeat") in filebeat/tests/integration/integration_test.go.
• libbeat/tests/integration/framework.go implements TestMainWithBuild and performs testbin.Build(...) automatically before running tests.

Documentation impact:

• docs/extend/testing.md still presents mage buildSystemTestBinary as a required step for Go integration tests (# Build the test binary before go test ... -tags integration).
• docs/extend/testing.md also states: To create the testing binary run mage buildSystemTestBinary.
• filebeat/input/journald/README.md still instructs manual test flow with mage buildSystemTestBinary before the Go integration test command.

These instructions are now outdated for Go integration tests and should be updated to avoid unnecessary/incorrect setup steps.

Suggested Actions

• Update docs/extend/testing.md Go integration section to state that test binaries are auto-built via TestMainWithBuild.
• Clarify in docs/extend/testing.md that mage buildSystemTestBinary is only required for Python system-test workflows (if applicable), not Go integration tests.
• Update filebeat/input/journald/README.md manual integration-test instructions to remove (or explicitly re-scope) the mage buildSystemTestBinary prerequisite for Go integration tests.

Note

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• expires on Apr 23, 2026, 2:53 PM UTC

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