Fix database connection exhaustion in tests by setting max_conns=1
when creating pgxpool via pgxpool.ParseConfig().
- Update setupTestServer() in test_helpers.go
- Update setupSyncTestDB() in sync_integration_test.go
This reduces per-test connection usage from 4 to 1, keeping total
connections well under PostgreSQL's default max_connections=100.
78 tests × 1 connection = 78 connections (down from 312 potential)
Fixes test failures: "FATAL: sorry, too many clients already"
See PROJECT_GUIDELINES.md Testing section for details.
Move database-dependent sync tests from internal/sync/ to
cmd/server/tests/ where they belong:
- TestSyncIntegration_OfflineDetector_* tests
- TestSyncIntegration_QueueProcessor_EnqueueProgress test
- Helper functions: setupSyncTestDB, createSyncTestUser/Device
These tests require a running PostgreSQL database and are
properly categorized as integration tests now.
Unit tests that remain in internal/sync/:
- TestOfflineDetector_ConstantValues (no DB needed)
- TestCalculateNextRetry (logic only)
- TestSyncTypeConstants, TestSyncStatusConstants (constants)
- TestPriorityConstants (constants)
All unit tests now pass with `make test` (no DB required).
john-okeefe