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Database schema validation, data integrity testing, migration testing, transaction isolation, and query performance. Use when testing data persistence, ensuring referential integrity, or validating database migrations.
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SKILL.md 표시 중
| name | database-testing |
| description | Database schema validation, data integrity testing, migration testing, transaction isolation, and query performance. Use when testing data persistence, ensuring referential integrity, or validating database migrations. |
| category | specialized-testing |
| priority | high |
| tokenEstimate | 900 |
| agents | ["qe-test-data-architect","qe-test-executor","qe-performance-tester"] |
| implementation_status | optimized |
| optimization_version | 1 |
| last_optimized | 2025-12-02T00:00:00.000Z |
| dependencies | [] |
| quick_reference_card | true |
| tags | ["database","schema","migration","transactions","integrity","sql","performance"] |
<default_to_action> When testing database operations:
Quick DB Testing Checklist:
Critical Success Factors:
| Type | Focus | When |
|---|---|---|
| Schema | Structure correct | Table creation |
| Integrity | Constraints work | Data operations |
| Migration | Up/down work | Schema changes |
| Transaction | ACID properties | Concurrent access |
| Performance | Query speed | Optimization |
| Property | Test Focus |
|---|---|
| Atomicity | All or nothing (rollback on error) |
| Consistency | Constraints always valid |
| Isolation | Concurrent transactions don't interfere |
| Durability | Committed data persists |
test('users table has correct schema', async () => {
const schema = await db.raw(`
SELECT column_name, data_type, is_nullable
FROM information_schema.columns
WHERE table_name = 'users'
`);
expect(schema).toContainEqual({
column_name: 'id',
data_type: 'integer',
is_nullable: 'NO'
});
expect(schema).toContainEqual({
column_name: 'email',
data_type: 'character varying',
is_nullable: 'NO'
});
});
test('email must be unique', async () => {
await db.users.create({ email: 'test@example.com' });
await expect(
db.users.create({ email: 'test@example.com' })
).rejects.toThrow('unique constraint violation');
});
test('foreign key prevents orphaned records', async () => {
const user = await db.users.create({ email: 'test@example.com' });
await db.orders.create({ userId: user.id, total: 100 });
await expect(
db.users.delete({ id: user.id })
).rejects.toThrow('foreign key constraint');
});
test('migration is reversible', async () => {
await migrate('add-users-table');
// Table exists after migration
const tables = await db.raw(`SELECT table_name FROM information_schema.tables`);
expect(tables.map(t => t.table_name)).toContain('users');
await rollback('add-users-table');
// Table gone after rollback
const tablesAfter = await db.raw(`SELECT table_name FROM information_schema.tables`);
expect(tablesAfter.map(t => t.table_name)).not.toContain('users');
});
test('migration preserves existing data', async () => {
await db.users.create({ email: 'test@example.com' });
await migrate('add-age-column');
const user = await db.users.findOne({ email: 'test@example.com' });
expect(user).toBeDefined();
expect(user.age).toBeNull(); // New column, null default
});
test('transaction rolls back on error', async () => {
const initialCount = await db.users.count();
try {
await db.transaction(async (trx) => {
await trx('users').insert({ email: 'user1@example.com' });
await trx('users').insert({ email: 'user2@example.com' });
throw new Error('Rollback test');
});
} catch (error) { /* Expected */ }
expect(await db.users.count()).toBe(initialCount);
});
test('concurrent transactions isolated', async () => {
const user = await db.users.create({ balance: 100 });
// Two concurrent withdrawals (race condition test)
await Promise.all([
db.transaction(async (trx) => {
const current = await trx('users').where({ id: user.id }).first();
await trx('users').update({ balance: current.balance - 50 });
}),
db.transaction(async (trx) => {
const current = await trx('users').where({ id: user.id }).first();
await trx('users').update({ balance: current.balance - 50 });
})
]);
const final = await db.users.findOne({ id: user.id });
expect(final.balance).toBe(0); // Proper isolation
});
// Generate test data with integrity
await Task("Generate Test Data", {
schema: 'ecommerce',
tables: ['users', 'products', 'orders'],
count: { users: 1000, products: 500, orders: 5000 },
preserveReferentialIntegrity: true
}, "qe-test-data-architect");
// Test migration safety
await Task("Migration Test", {
migration: 'add-payment-status-column',
tests: ['forward', 'rollback', 'data-preservation'],
environment: 'staging'
}, "qe-test-executor");
aqe/database-testing/
├── schema-snapshots/* - Current schema state
├── migrations/* - Migration test results
├── integrity/* - Constraint validation
└── performance/* - Query benchmarks
const dbFleet = await FleetManager.coordinate({
strategy: 'database-testing',
agents: [
'qe-test-data-architect', // Generate test data
'qe-test-executor', // Run DB tests
'qe-performance-tester' // Query performance
],
topology: 'sequential'
});
Database bugs are catastrophic. Data loss is unrecoverable. Corruption spreads silently. Performance issues compound.
Test migrations before production: Forward works, rollback works, data preserved, performance acceptable. Never deploy untested migrations.
With Agents: qe-test-data-architect generates realistic test data with referential integrity. qe-test-executor validates migrations automatically in CI/CD.
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