Testing improvement in veda-backend

[smohiudd]

What

The VEDA testing plan outlines the current state of testing coverage for backend services. The actions from the plan include the following:

• Determine custom endpoints not currently in STAC FastAPI or Titiler.
• Add tests to validate custom endpoints.
• Consider adding tests to check each of the routes through the api gateway, e.g. call GET /mosaic/{searchid}/tiles/{z}/{x}/{y}/asset and verify status code. This would validate successful deployment and guard against issues with cloudfront

PI Objective

Objective 6: https://github.com/NASA-IMPACT/veda-architecture/issues/410

Acceptance Criteria

• Tested included for custom endpoints and deployed to dev

[smohiudd]

Not maintained endpoints:
STAC: collectionid
RASTER: alternate assets