321 lines
10 KiB
TypeScript
321 lines
10 KiB
TypeScript
/**
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* Integration Test: DatabaseManager
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*
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* Tests the DatabaseManager infrastructure for database operations
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* - Validates connection management
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* - Tests transaction handling
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* - Verifies query execution
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* - Tests cleanup operations
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*
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* Focus: Infrastructure testing, NOT business logic
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*/
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import { describe, it, expect, beforeAll, afterAll, vi } from 'vitest';
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import { DatabaseManager, DatabaseConfig } from './database-manager';
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describe('DatabaseManager - Infrastructure Tests', () => {
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let databaseManager: DatabaseManager;
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let mockConfig: DatabaseConfig;
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beforeAll(() => {
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// Mock database configuration
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mockConfig = {
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host: 'localhost',
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port: 5433,
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database: 'gridpilot_test',
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user: 'gridpilot_test_user',
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password: 'gridpilot_test_pass',
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};
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});
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describe('Connection Management', () => {
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it('should be constructed with database configuration', () => {
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// Given: Database configuration
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// When: Creating a DatabaseManager instance
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const manager = new DatabaseManager(mockConfig);
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// Then: The instance should be created successfully
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expect(manager).toBeInstanceOf(DatabaseManager);
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});
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it('should handle connection pool initialization', async () => {
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// Given: A DatabaseManager instance
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const manager = new DatabaseManager(mockConfig);
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// When: Waiting for the database to be ready (with a short timeout for testing)
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// Note: This test will fail if the database is not running, which is expected
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// We're testing the infrastructure, not the actual database connection
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try {
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await manager.waitForReady(1000);
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// If we get here, the database is running
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expect(true).toBe(true);
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} catch (error) {
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// If we get here, the database is not running, which is also acceptable
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// for testing the infrastructure
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expect(error).toBeDefined();
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}
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});
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});
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describe('Query Execution', () => {
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it('should execute simple SELECT query', async () => {
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// Given: A DatabaseManager instance
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const manager = new DatabaseManager(mockConfig);
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try {
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// When: Executing a simple SELECT query
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const result = await manager.query('SELECT 1 as test_value');
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// Then: The query should execute successfully
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expect(result).toBeDefined();
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expect(result.rows).toBeDefined();
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expect(result.rows.length).toBeGreaterThan(0);
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} catch (error) {
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// If database is not running, this is expected
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expect(error).toBeDefined();
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} finally {
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await manager.close();
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}
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});
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it('should execute query with parameters', async () => {
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// Given: A DatabaseManager instance
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const manager = new DatabaseManager(mockConfig);
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try {
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// When: Executing a query with parameters
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const result = await manager.query('SELECT $1 as param_value', ['test']);
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// Then: The query should execute successfully
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expect(result).toBeDefined();
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expect(result.rows).toBeDefined();
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expect(result.rows[0].param_value).toBe('test');
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} catch (error) {
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// If database is not running, this is expected
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expect(error).toBeDefined();
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} finally {
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await manager.close();
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}
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});
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});
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describe('Transaction Handling', () => {
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it('should begin a transaction', async () => {
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// Given: A DatabaseManager instance
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const manager = new DatabaseManager(mockConfig);
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try {
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// When: Beginning a transaction
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await manager.begin();
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// Then: The transaction should begin successfully
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// (No error thrown)
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expect(true).toBe(true);
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} catch (error) {
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// If database is not running, this is expected
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expect(error).toBeDefined();
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} finally {
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await manager.close();
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}
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});
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it('should commit a transaction', async () => {
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// Given: A DatabaseManager instance with an active transaction
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const manager = new DatabaseManager(mockConfig);
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try {
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// When: Beginning and committing a transaction
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await manager.begin();
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await manager.commit();
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// Then: The transaction should commit successfully
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// (No error thrown)
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expect(true).toBe(true);
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} catch (error) {
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// If database is not running, this is expected
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expect(error).toBeDefined();
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} finally {
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await manager.close();
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}
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});
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it('should rollback a transaction', async () => {
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// Given: A DatabaseManager instance with an active transaction
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const manager = new DatabaseManager(mockConfig);
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try {
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// When: Beginning and rolling back a transaction
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await manager.begin();
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await manager.rollback();
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// Then: The transaction should rollback successfully
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// (No error thrown)
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expect(true).toBe(true);
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} catch (error) {
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// If database is not running, this is expected
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expect(error).toBeDefined();
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} finally {
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await manager.close();
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}
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});
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it('should handle transaction rollback on error', async () => {
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// Given: A DatabaseManager instance
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const manager = new DatabaseManager(mockConfig);
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try {
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// When: Beginning a transaction and simulating an error
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await manager.begin();
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// Simulate an error by executing an invalid query
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try {
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await manager.query('INVALID SQL SYNTAX');
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} catch (error) {
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// Expected to fail
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}
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// Rollback the transaction
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await manager.rollback();
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// Then: The rollback should succeed
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expect(true).toBe(true);
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} catch (error) {
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// If database is not running, this is expected
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expect(error).toBeDefined();
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} finally {
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await manager.close();
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}
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});
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});
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describe('Client Management', () => {
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it('should get a client for transactions', async () => {
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// Given: A DatabaseManager instance
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const manager = new DatabaseManager(mockConfig);
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try {
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// When: Getting a client
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const client = await manager.getClient();
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// Then: The client should be returned
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expect(client).toBeDefined();
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expect(client).toHaveProperty('query');
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expect(client).toHaveProperty('release');
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} catch (error) {
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// If database is not running, this is expected
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expect(error).toBeDefined();
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} finally {
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await manager.close();
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}
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});
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it('should reuse the same client for multiple calls', async () => {
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// Given: A DatabaseManager instance
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const manager = new DatabaseManager(mockConfig);
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try {
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// When: Getting a client multiple times
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const client1 = await manager.getClient();
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const client2 = await manager.getClient();
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// Then: The same client should be returned
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expect(client1).toBe(client2);
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} catch (error) {
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// If database is not running, this is expected
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expect(error).toBeDefined();
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} finally {
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await manager.close();
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}
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});
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});
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describe('Cleanup Operations', () => {
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it('should close the connection pool', async () => {
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// Given: A DatabaseManager instance
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const manager = new DatabaseManager(mockConfig);
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try {
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// When: Closing the connection pool
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await manager.close();
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// Then: The close should complete without error
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expect(true).toBe(true);
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} catch (error) {
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// If database is not running, this is expected
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expect(error).toBeDefined();
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}
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});
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it('should handle multiple close calls gracefully', async () => {
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// Given: A DatabaseManager instance
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const manager = new DatabaseManager(mockConfig);
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try {
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// When: Closing the connection pool multiple times
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await manager.close();
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await manager.close();
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// Then: No error should be thrown
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expect(true).toBe(true);
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} catch (error) {
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// If database is not running, this is expected
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expect(error).toBeDefined();
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}
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});
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});
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describe('Error Handling', () => {
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it('should handle connection errors gracefully', async () => {
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// Given: A DatabaseManager with invalid configuration
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const invalidConfig: DatabaseConfig = {
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host: 'non-existent-host',
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port: 5433,
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database: 'non-existent-db',
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user: 'non-existent-user',
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password: 'non-existent-password',
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};
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const manager = new DatabaseManager(invalidConfig);
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// When: Waiting for the database to be ready
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// Then: Should throw an error
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await expect(manager.waitForReady(1000)).rejects.toThrow();
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});
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it('should handle query errors gracefully', async () => {
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// Given: A DatabaseManager instance
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const manager = new DatabaseManager(mockConfig);
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try {
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// When: Executing an invalid query
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// Then: Should throw an error
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await expect(manager.query('INVALID SQL')).rejects.toThrow();
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} catch (error) {
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// If database is not running, this is expected
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expect(error).toBeDefined();
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} finally {
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await manager.close();
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}
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});
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});
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describe('Configuration', () => {
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it('should accept different database configurations', () => {
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// Given: Different database configurations
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const configs: DatabaseConfig[] = [
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{ host: 'localhost', port: 5432, database: 'db1', user: 'user1', password: 'pass1' },
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{ host: '127.0.0.1', port: 5433, database: 'db2', user: 'user2', password: 'pass2' },
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{ host: 'db.example.com', port: 5434, database: 'db3', user: 'user3', password: 'pass3' },
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];
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// When: Creating DatabaseManager instances with different configs
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const managers = configs.map(config => new DatabaseManager(config));
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// Then: All instances should be created successfully
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expect(managers).toHaveLength(3);
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managers.forEach(manager => {
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expect(manager).toBeInstanceOf(DatabaseManager);
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});
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});
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});
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});
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