chore(deleter): extend deleter billing mocks for the pre-flight check

[whoAbhishekSah]

Part of #1837. Base of the stack; the pre-flight change sits on top.

Extends the deleter's billing mocks for the pre-flight check:

• credit service mock gets GetBalance
• subscription service mock gets List and Cancel
• invoice service mock gets SyncWithProvider
• new plan service mock (GetByID, used to resolve the standard plan)

The matching interface methods land with the pre-flight change in the next PR; the mocks compile standalone.

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
frontier	Ready	Preview	Aug 13, 2026 11:16am

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Review details

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 2c48bc83-55ea-42d0-aef3-4d14311a626e

📥 Commits

Reviewing files that changed from the base of the PR and between 2f3076f and 3f71c2d.

📒 Files selected for processing (1)

• core/deleter/mocks/plan_service.go

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: d10a8c8d-9ca3-4340-b061-318d93e413bf

📥 Commits

Reviewing files that changed from the base of the PR and between 229ea89 and 2f3076f.

📒 Files selected for processing (3)

• core/deleter/mocks/credit_service.go
• core/deleter/mocks/invoice_service.go
• core/deleter/mocks/subscription_service.go

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📝 Walkthrough

Summary by CodeRabbit

• Tests
  • Expanded service test coverage with mock support for credit balance retrieval, invoice synchronization, and subscription cancellation and listing.
  • Added flexible expectation, return-value, and callback handling for these service interactions.

Walkthrough

Changes

Deleter mock extensions

Layer / File(s)	Summary
Credit balance mock support core/deleter/mocks/credit_service.go	Adds GetBalance invocation handling and typed Run, Return, RunAndReturn, and expectation helpers.
Invoice synchronization mock support core/deleter/mocks/invoice_service.go	Adds SyncWithProvider invocation handling and typed return, callback, and expectation helpers.
Subscription method mock support core/deleter/mocks/subscription_service.go	Adds generated mock support for Cancel and List, including typed returns, callbacks, expectations, and the required package import.

Estimated code review effort: 2 (Simple) | ~10 minutes

Mergeability Score: ⚪ Minimal · up to 2f307

This change only extends generated billing and subscription mocks for upcoming interface updates and introduces no actionable merge-blocking risk beyond normal checks and review.

Possibly related PRs

• raystack/frontier#1530: Extends related core/deleter mocks for invoice and subscription services.
• raystack/frontier#1857: Adds mock methods used by deleter preflight checks.

Suggested reviewers: rohilsurana

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[coveralls]

Coverage Report for CI Build 31694737529

Coverage remained the same at 48.266%

Details

• Coverage remained the same as the base build.
• Patch coverage: No coverable lines changed in this PR.
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	39761
Covered Lines:	19191
Line Coverage:	48.27%
Coverage Strength:	15.43 hits per line

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💛 - Coveralls