Task

Implement code coverage instrumentation and reporting, integrated with the existing ReportPortal instance and Codecov.

Background

Coverage metrics will be mandated by P&D in CY26. RHDH already uses ReportPortal for test results. The coverage pipeline should leverage this.

Components:

1. Unit test coverage: Jest + Istanbul, uploaded to Codecov (upstream) and SonarQube (downstream)
2. E2E coverage: Istanbul.js for frontend coverage during Playwright runs
3. ReportPortal integration: Link coverage reports to test execution in ReportPortal for unified test health + coverage view
4. PR checks: Coverage diff in PR comments via Codecov GitHub integration
5. Thresholds: 60% for plugins, 50% for core (start reporting-only, then enforce)

Pipeline: CI -> Tests -> .lcov files -> Codecov/SonarQube + ReportPortal -> DevLake (P&D) -> Grafana

Dependencies and Blockers

• Related: RHDHPLAN-851

Acceptance Criteria

• Codecov configured for RHDH monorepo (upstream)
• SonarQube configured (downstream)
• ReportPortal displays coverage data alongside test results
• Coverage diff in PR comments
• Thresholds enforced after reporting-only period
• Dashboard with coverage trends