[jsweep] Clean action_setup_otlp.cjs

[github-actions]

Summary

Cleaned action_setup_otlp.cjs (Node.js context) by improving testability and adding a comprehensive test suite.

Context Type

Node.js — This file runs directly via node action_setup_otlp.cjs from setup.sh or through actions/setup/index.js.

Changes

action_setup_otlp.cjs

• Moved dynamic require() to module level: The require(path.join(__dirname, "send_otlp_span.cjs")) inside run() was moved to a top-level const sendOtlpSpan = require("./send_otlp_span.cjs"). This mirrors the pattern in action_conclusion_otlp.cjs and enables tests to patch module exports via the shared CJS module cache.
• Switched appendFileSync pattern: Changed const { appendFileSync } = require("fs") (destructured, un-mockable) to const fs = require("fs") with fs.appendFileSync(...) calls. This allows vi.spyOn(fsMod, "appendFileSync") to intercept calls in tests.
• Removed path require: No longer needed after eliminating the dynamic path.join(__dirname, ...) require.
• All logic and behavior preserved exactly.

action_setup_otlp.test.cjs (new file)

Added 29 test cases covering:

Group	Tests
Module export	Exports run as a function
No OTEL endpoint	Logs skip message, still calls sendJobSetupSpan, no span-sent log
OTEL endpoint set	Logs endpoint URL, calls sendJobSetupSpan, logs span sent with IDs
INPUT_TRACE_ID	Lowercase propagation, undefined when not set, both env var forms, log messages
SETUP_START_MS	Parsed correctly, 0 default, empty string default
GITHUB_OUTPUT	Writes trace-id, logs write, skips when not set, skips when traceId invalid
GITHUB_ENV	Writes all three vars, skips when not set, skips invalid trace/span IDs, logs writes
Error handling	Propagates errors from sendJobSetupSpan

Test Improvements

• Before: 0 tests
• After: 29 tests covering all code paths

Validation ✅

All four checks passed:

• Formatting: npm run format:cjs ✓
• Linting: npm run lint:cjs ✓
• Type checking: npm run typecheck ✓
• Tests: npm run test:js -- --no-file-parallelism action_setup_otlp → 29/29 passed ✓

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• expires on Apr 10, 2026, 4:40 AM UTC