test: Add WireMock Integration Testing Framework for Web SDK

[jaissica12]

Background

• The iOS mParticle SDK has integration testing framework that use WireMock to capture and verify outbound network requests. This PR brings the same capability to the Web SDK, enabling consistent cross-platform validation of SDK behavior.

What Has Changed

• IntegrationTests/ - Complete integration testing framework
  • common.sh - Shared shell utilities (build, Docker, HTTP server, Playwright)
  • run_wiremock_recorder.sh - Recording mode script
  • run_clean_integration_tests.sh - Verification mode script
  • run-browser-test.js - Playwright headless browser runner
  • sanitize_mapping.py - API key sanitization for mappings
  • transform_mapping_body.py - Dynamic field replacement in request bodies
  • test-app/ - Minimal web application with 5 test cases
  • wiremock-recordings/ - Baseline stub mappings and response bodies
• .gitignore - Added patterns for test artifacts and temp files

Screenshots/Video

• {Include any screenshots or video demonstrating the new feature or fix, if applicable}

Checklist

• I have performed a self-review of my own code.
• I have made corresponding changes to the documentation.
• I have added tests that prove my fix is effective or that my feature works.
• I have tested this locally.

Additional Notes

• Requires Docker Desktop to be running

Reference Issue (For employees only. Ignore if you are an outside contributor)

• Closes https://go/j/SDKE-533

[sonarqubecloud]

Quality Gate passed

Issues
111 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
1.7% Duplication on New Code

See analysis details on SonarQube Cloud