Construct Test Coverage for Vercel DNS Verification and HTTPS Certificate Provisioning

[temma02]

Description

Build test coverage for the Vercel DNS verification and HTTPS certificate provisioning flow, covering DNS record validation, certificate issuance polling, and provisioning failure handling.

Requirements and Context

• Testing: Target apps/backend/src/app/api/deployments/[id]/dns/verify/route.ts and https/route.ts
• Coverage: Cover DNS validation, certificate polling, and failure paths
• Documentation: Document the DNS/HTTPS provisioning flow

Suggested Execution

Branch: test/issue-043-vercel-dns-https-provisioning-tests

Implement Changes

• Add tests for DNS record validation (A, CNAME, TXT records)
• Test certificate provisioning state polling (pending → issued)
• Assert correct handling of DNS verification failures and certificate issuance errors
• Test timeout behavior when certificate provisioning stalls

Test and Commit

• Cover DNS validation, certificate polling, and failure scenarios
• Assert correct error responses for each failure mode
• Document the DNS/HTTPS flow

Example Commit Message

test(vercel): add coverage for DNS verification and HTTPS certificate provisioning

- Test DNS record validation for A/CNAME/TXT records
- Test certificate provisioning state polling
- Assert correct handling of verification and issuance failures

Guidelines

• Mock Vercel DNS and certificate APIs
• Test polling timeout behavior explicitly
• Use realistic DNS record fixtures

[Mystery-CLI]

@Mystery-CLI has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

i would like to work on this issue

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[drips-wave]

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