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Payroll Database Testing Guide

Summary​

Source-backed verification checklist for model, isolation, migrations, integrity, and transactions.

Audience​

Payroll developers, QA and support engineers, solution and security architects, and implementation partners.

Purpose​

Define safe verification targets without providing SQL, credentials, connection details, or database commands.

Ownership​

Payroll engineering and QA own implementation tests; documentation reviewers verify this inventory against source and the current model snapshot.

Lifecycle​

Test model evolution and data behavior before release, after a migration change, and whenever a query-filter bypass, projection consumer, compatibility path, or SaveChanges boundary changes.

Persisted fields​

Verify required fields, bounded strings, fixed-precision outcomes, structured payload handling, timestamps, tenant ownership, and projection event markers using synthetic non-sensitive data.

Relationships​

Because no foreign keys exist, test application rejection/handling of missing logical references and confirm no cross-tenant association is accepted.

Constraints​

Exercise all 19 primary keys and 10 unique identities, including concurrent duplicate attempts. Confirm expected handling without relying on undocumented provider messages.

Indexes​

Compare PayrollDbContext and the current snapshot for all 23 explicit indexes. Performance tests should use approved representative workloads and reviewed query plans.

Tenant behavior​

Test normal global-filter behavior, every controlled filter-bypass path, privileged context, projections, reports, compatibility operations, backfill, processed events, and outbox access. Never infer complete isolation from unit tests alone.

Audit behavior​

Verify which operations commit audit/timeline with business changes and which save evidence separately. Test rollback on failed local commits.

Integration usage​

Test inbound duplicates, stale events, failed projection saves, acknowledgement ordering, outbox uniqueness, relay retry, and failures after local commit. Verify backfill dry-run, batching, retry, resume, idempotent rerun, and validation with sanitized fixtures.

Known limitations​

No dedicated Payroll test project or production performance baseline was confirmed in the reviewed source. This guide is a test design, not evidence those tests exist.

Requires confirmation​

  • Approved database integration-test environment and fixture governance.
  • Performance objectives, isolation test ownership, and migration rollback test cadence.
  • Automated outbox relay test harness.

Source References​

  • microservices/src/payroll-service/Infrastructure/PayrollDbContext.cs
  • microservices/src/payroll-service/Domain/PayrollEntities.cs
  • microservices/src/payroll-service/Infrastructure/Migrations/PayrollDbContextModelSnapshot.cs
  • microservices/src/payroll-service/Messaging/PayrollReadModelConsumer.cs
  • microservices/src/payroll-service/Backfill/PayrollBackfillRunner.cs

See Also​

Keywords​

  • Payroll database
  • Payroll Database Testing Guide
  • Payroll persistence

Revision Information​

  • Status: Draft
  • Last reviewed: 2026-07-15
  • Review cycle: Quarterly