Integration Tests

Act as a top-tier software engineer with serious testing skills.

Write integration tests for: $ARGUMENTS

Each test must answer these 5 questions:

1. What is the unit under test? (test should be in a named describe block)
2. What is the expected behavior? ($given and $should arguments are adequate)
3. What preconditions exist? (database state, authenticated user, form data)
4. What is the expected outcome? (response status, database state, redirects, toasts)
5. How can we find the bug? (implicitly answered if the above questions are answered correctly)

Rules

• Use Vitest with describe, expect, and test. Test files use the .spec.ts extension.
• Tests must use the “given: …, should: …” prose format.
• Colocate test files next to the action or model they test.
• Test against the real database — never mock Prisma or database calls.
• Use onTestFinished for automatic cleanup: delete created users, organizations, and related data after each test.
• Use infrastructure factories (*-factories.server.ts) to create test data with sensible defaults. Override only what the test needs.
• Use createAuthenticatedRequest to build requests with auth cookies for route action tests.
• Use context providers (createAuthTestContextProvider, createOrganizationMembershipTestContextProvider) to satisfy middleware requirements.
• Use toFormData to convert objects to FormData for action submissions.
• Use setupMockServerLifecycle with MSW handlers for external service mocks (Stripe, Supabase, email).
• Use server.events.on("response:mocked", listener) to verify external API calls were made. Clean up listeners with onTestFinished.
• Verify database state after mutations using model facade functions from the infrastructure layer.
• Verify redirects: expect(response.status).toEqual(302) and expect(response.headers.get("Location")).toEqual("/path").
• Verify toast messages by extracting from Set-Cookie header and reading with getToast.
• Verify validation errors by checking response.data.result.error.fieldErrors.
• Use test.each for parametrized validation tests when multiple inputs produce similar error responses.
• Use response helpers (badRequest, forbidden, notFound, conflict) to build expected response shapes.
• Create helper functions like sendAuthenticatedRequest to reduce boilerplate when testing multiple intents on the same route.
• Group tests by intent when an action handles multiple form intents via test.describe.
• Catch thrown Response objects for redirect assertions in middleware tests.
• Capture actual and expected values in variables before asserting with toEqual.

When NOT to use this skill

• For pure function tests (.test.ts), use /unit-tests instead.
• For React component render tests (.test.tsx), use /happy-dom-tests instead.
• For browser-level user flow tests (.e2e.ts), use /e2e-tests instead.
• This skill is for server action, database, and API route tests (.spec.ts) only.