Altus 4

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Testing Strategy & Implementation ​

Comprehensive Testing Framework for Altus 4

This document outlines the complete testing strategy for Altus 4, covering all aspects from unit tests to performance testing, ensuring code quality, reliability, and maintainability.

Testing Philosophy ​

Testing Pyramid ​

Altus 4 follows the testing pyramid approach with emphasis on fast, reliable tests:

mermaid
graph TB
    E2E[End-to-End Tests<br/>Manual & Automated<br/>5% - High Value, Slow]
    INT[Integration Tests<br/>API & Service Integration<br/>25% - Medium Speed]
    UNIT[Unit Tests<br/>Services, Utils, Business Logic<br/>70% - Fast, Isolated]

    E2E -.-> INT
    INT -.-> UNIT

    style E2E fill:#ffebee
    style INT fill:#e8f5e8
    style UNIT fill:#e3f2fd

Testing Principles ​

  1. Fast Feedback: Tests should run quickly to enable rapid development
  2. Reliability: Tests should be deterministic and not flaky
  3. Isolation: Tests should not depend on external services or other tests
  4. Maintainability: Tests should be easy to understand and modify
  5. Coverage: Critical paths must have comprehensive test coverage

Test Organization ​

Directory Structure ​

tests/
├── unit/                    # Unit tests (70% of tests)
│   ├── services/           # Service layer tests
│   ├── controllers/        # Controller tests
│   ├── middleware/         # Middleware tests
│   ├── utils/              # Utility function tests
│   └── types/              # Type validation tests
├── integration/            # Integration tests (25% of tests)
│   ├── api/               # API endpoint tests
│   ├── database/          # Database integration tests
│   └── services/          # Service integration tests
├── performance/           # Performance tests (3% of tests)
│   ├── load/              # Load testing
│   └── stress/            # Stress testing
├── e2e/                   # End-to-end tests (2% of tests)
│   ├── user-flows/        # Complete user journeys
│   └── scenarios/         # Business scenario tests
├── fixtures/              # Test data and fixtures
│   ├── database/          # Database seed data
│   ├── api/               # API response fixtures
│   └── search/            # Search result fixtures
├── helpers/               # Test utilities and helpers
│   ├── database.ts        # Database test helpers
│   ├── auth.ts            # Authentication helpers
│   ├── mocks.ts           # Mock factories
│   └── assertions.ts      # Custom assertions
└── config/                # Test configuration
    ├── jest.config.js     # Jest configuration
    ├── setup.ts           # Global test setup
    └── teardown.ts        # Global test teardown

Unit Testing Strategy ​

Service Layer Testing ​

typescript
// tests/unit/services/SearchService.test.ts
import { SearchService } from '@/services/SearchService';
import {
  createMockDatabaseService,
  createMockAIService,
} from '../../helpers/mocks';

describe('SearchService', () => {
  let searchService: SearchService;
  let mockDatabaseService: jest.Mocked<DatabaseService>;
  let mockAIService: jest.Mocked<AIService>;

  beforeEach(() => {
    mockDatabaseService = createMockDatabaseService();
    mockAIService = createMockAIService();
    searchService = new SearchService(mockDatabaseService, mockAIService);
  });

  describe('search functionality', () => {
    it('should execute search with proper parameters', async () => {
      // Arrange
      const searchRequest = {
        query: 'mysql performance',
        databases: ['db-1'],
        userId: 'user-1',
      };

      const expectedResults = [
        { id: '1', title: 'MySQL Guide', relevanceScore: 0.9 },
      ];

      mockDatabaseService.executeFullTextSearch.mockResolvedValue(
        expectedResults
      );

      // Act
      const result = await searchService.search(searchRequest);

      // Assert
      expect(result.results).toHaveLength(1);
      expect(mockDatabaseService.executeFullTextSearch).toHaveBeenCalledWith(
        'db-1',
        'mysql performance',
        [],
        undefined,
        20,
        0
      );
    });

    it('should handle database failures gracefully', async () => {
      // Test error handling scenarios
      const searchRequest = {
        query: 'test query',
        databases: ['failing-db'],
        userId: 'user-1',
      };

      mockDatabaseService.executeFullTextSearch.mockRejectedValue(
        new Error('Database connection failed')
      );

      await expect(searchService.search(searchRequest)).rejects.toThrow(
        'Search failed'
      );
    });
  });
});

Controller Testing ​

typescript
// tests/unit/controllers/SearchController.test.ts
import { SearchController } from '@/controllers/SearchController';
import { Request, Response } from 'express';
import { createMockSearchService } from '../../helpers/mocks';

describe('SearchController', () => {
  let controller: SearchController;
  let mockSearchService: jest.Mocked<SearchService>;
  let mockRequest: Partial<Request>;
  let mockResponse: Partial<Response>;

  beforeEach(() => {
    mockSearchService = createMockSearchService();
    controller = new SearchController(mockSearchService);

    mockRequest = {
      body: {},
      user: { id: 'user-1' },
      apiKey: { id: 'key-1', permissions: ['search'] },
    };

    mockResponse = {
      json: jest.fn(),
      status: jest.fn().mockReturnThis(),
    };
  });

  it('should return search results for valid request', async () => {
    // Test controller logic
    mockRequest.body = {
      query: 'test query',
      databases: ['db-1'],
    };

    const mockResults = {
      results: [{ id: '1', title: 'Test Result' }],
      totalCount: 1,
    };

    mockSearchService.search.mockResolvedValue(mockResults);

    await controller.search(mockRequest as Request, mockResponse as Response);

    expect(mockResponse.json).toHaveBeenCalledWith({
      success: true,
      data: mockResults,
      meta: expect.objectContaining({
        timestamp: expect.any(Date),
        requestId: expect.any(String),
      }),
    });
  });
});

Integration Testing Strategy ​

API Integration Tests ​

typescript
// tests/integration/api/search.test.ts
import request from 'supertest';
import { app } from '@/app';
import { setupTestDatabase, cleanupTestDatabase } from '../../helpers/database';
import { createTestUser, createTestApiKey } from '../../helpers/auth';

describe('Search API Integration', () => {
  let testApiKey: string;
  let testDatabaseId: string;

  beforeAll(async () => {
    await setupTestDatabase();

    const user = await createTestUser();
    testApiKey = await createTestApiKey(user.id);
    testDatabaseId = await createTestDatabase(user.id);
  });

  afterAll(async () => {
    await cleanupTestDatabase();
  });

  describe('POST /api/v1/search', () => {
    it('should return search results', async () => {
      const response = await request(app)
        .post('/api/v1/search')
        .set('Authorization', `Bearer ${testApiKey}`)
        .send({
          query: 'test search',
          databases: [testDatabaseId],
          limit: 10,
        })
        .expect(200);

      expect(response.body).toMatchObject({
        success: true,
        data: {
          results: expect.any(Array),
          totalCount: expect.any(Number),
        },
      });
    });

    it('should handle authentication errors', async () => {
      await request(app)
        .post('/api/v1/search')
        .send({ query: 'test' })
        .expect(401);
    });

    it('should validate request parameters', async () => {
      const response = await request(app)
        .post('/api/v1/search')
        .set('Authorization', `Bearer ${testApiKey}`)
        .send({
          // Missing required query parameter
          databases: [testDatabaseId],
        })
        .expect(400);

      expect(response.body.error.code).toBe('VALIDATION_ERROR');
    });
  });
});

Database Integration Tests ​

typescript
// tests/integration/database/SearchRepository.test.ts
import { DatabaseService } from '@/services/DatabaseService';
import { setupTestDatabase, seedTestData } from '../../helpers/database';

describe('Database Integration', () => {
  let databaseService: DatabaseService;

  beforeAll(async () => {
    await setupTestDatabase();
    databaseService = new DatabaseService();
  });

  beforeEach(async () => {
    await seedTestData();
  });

  it('should execute full-text search queries', async () => {
    const results = await databaseService.executeFullTextSearch(
      'test-db-id',
      'mysql performance',
      ['articles'],
      ['title', 'content'],
      20,
      0
    );

    expect(results).toBeInstanceOf(Array);
    expect(results.length).toBeGreaterThan(0);
    expect(results[0]).toHaveProperty('title');
    expect(results[0]).toHaveProperty('content');
  });

  it('should handle connection failures', async () => {
    const invalidDbService = new DatabaseService({
      host: 'invalid-host',
      port: 9999,
    });

    await expect(
      invalidDbService.executeFullTextSearch('invalid', 'query', [], [], 10, 0)
    ).rejects.toThrow('Database connection failed');
  });
});

Performance Testing ​

Load Testing Configuration ​

typescript
// tests/performance/load/search-load.test.ts
import { performance } from 'perf_hooks';
import { SearchService } from '@/services/SearchService';
import { createMockDependencies } from '../../helpers/mocks';

describe('Search Performance', () => {
  let searchService: SearchService;

  beforeAll(() => {
    const { databaseService, aiService, cacheService } =
      createMockDependencies();
    searchService = new SearchService(databaseService, aiService, cacheService);
  });

  it('should handle concurrent searches efficiently', async () => {
    const concurrentRequests = 100;
    const searchRequests = Array.from(
      { length: concurrentRequests },
      (_, i) => ({
        query: `test query ${i}`,
        databases: ['test-db'],
        userId: `user-${i}`,
      })
    );

    const startTime = performance.now();

    const results = await Promise.all(
      searchRequests.map(request => searchService.search(request))
    );

    const endTime = performance.now();
    const totalTime = endTime - startTime;
    const averageTime = totalTime / concurrentRequests;

    expect(results).toHaveLength(concurrentRequests);
    expect(averageTime).toBeLessThan(100); // Average response time < 100ms
    expect(totalTime).toBeLessThan(5000); // Total time < 5 seconds
  });

  it('should maintain performance under memory pressure', async () => {
    // Test memory usage and performance degradation
    const largeDataSet = Array.from({ length: 10000 }, (_, i) => ({
      id: i,
      title: `Large dataset item ${i}`,
      content: 'x'.repeat(1000), // 1KB of content per item
    }));

    const startMemory = process.memoryUsage().heapUsed;
    const startTime = performance.now();

    // Process large dataset
    for (let i = 0; i < 1000; i++) {
      await searchService.search({
        query: 'test query',
        databases: ['large-db'],
        userId: 'performance-test-user',
      });
    }

    const endTime = performance.now();
    const endMemory = process.memoryUsage().heapUsed;

    const memoryIncrease = (endMemory - startMemory) / 1024 / 1024; // MB
    const averageTime = (endTime - startTime) / 1000;

    expect(memoryIncrease).toBeLessThan(100); // Memory increase < 100MB
    expect(averageTime).toBeLessThan(50); // Average time < 50ms
  });
});

Stress Testing ​

typescript
// tests/performance/stress/api-stress.test.ts
import request from 'supertest';
import { app } from '@/app';
import { performance } from 'perf_hooks';

describe('API Stress Testing', () => {
  const API_KEY = process.env.TEST_API_KEY;

  it('should handle high request volume', async () => {
    const requestCount = 1000;
    const concurrency = 50;
    const batches = requestCount / concurrency;

    const results = [];

    for (let batch = 0; batch < batches; batch++) {
      const batchPromises = Array.from({ length: concurrency }, () =>
        request(app)
          .post('/api/v1/search')
          .set('Authorization', `Bearer ${API_KEY}`)
          .send({
            query: 'stress test query',
            databases: ['test-db'],
            limit: 10,
          })
      );

      const batchResults = await Promise.allSettled(batchPromises);
      results.push(...batchResults);
    }

    const successful = results.filter(r => r.status === 'fulfilled').length;
    const failed = results.filter(r => r.status === 'rejected').length;
    const successRate = (successful / requestCount) * 100;

    expect(successRate).toBeGreaterThan(95); // 95% success rate
    expect(failed).toBeLessThan(requestCount * 0.05); // Less than 5% failures
  });
});

Test Data Management ​

Fixtures and Seed Data ​

typescript
// tests/fixtures/search-fixtures.ts
export const searchFixtures = {
  users: [
    {
      id: 'user-1',
      email: 'test@example.com',
      name: 'Test User',
      role: 'user',
    },
  ],

  apiKeys: [
    {
      id: 'key-1',
      userId: 'user-1',
      keyPrefix: 'altus4_sk_test_abc123',
      permissions: ['search', 'analytics'],
      environment: 'test',
    },
  ],

  databases: [
    {
      id: 'db-1',
      userId: 'user-1',
      name: 'Test Database',
      host: 'localhost',
      database: 'test_db',
    },
  ],

  searchResults: [
    {
      id: 1,
      title: 'MySQL Performance Optimization',
      content: 'Complete guide to optimizing MySQL performance...',
      author: 'Database Expert',
      published_at: '2024-01-15T10:00:00Z',
    },
  ],
};

// Database seeding helper
export async function seedTestData(connection: Connection) {
  // Clear existing data
  await connection.query('DELETE FROM searches');
  await connection.query('DELETE FROM databases');
  await connection.query('DELETE FROM api_keys');
  await connection.query('DELETE FROM users');

  // Insert test data
  for (const user of searchFixtures.users) {
    await connection.query('INSERT INTO users SET ?', user);
  }

  for (const apiKey of searchFixtures.apiKeys) {
    await connection.query('INSERT INTO api_keys SET ?', apiKey);
  }

  for (const database of searchFixtures.databases) {
    await connection.query('INSERT INTO databases SET ?', database);
  }
}

Test Automation & CI/CD ​

GitHub Actions Workflow ​

yaml
# .github/workflows/test.yml
name: Test Suite

on:
  push:
    branches: [main, develop]
  pull_request:
    branches: [main]

jobs:
  unit-tests:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v3

      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: '18'
          cache: 'npm'

      - name: Install dependencies
        run: npm ci

      - name: Run unit tests
        run: npm run test:unit -- --coverage

      - name: Upload coverage
        uses: codecov/codecov-action@v3
        with:
          file: ./coverage/lcov.info

  integration-tests:
    runs-on: ubuntu-latest

    services:
      mysql:
        image: mysql:8.0
        env:
          MYSQL_ROOT_PASSWORD: test
          MYSQL_DATABASE: altus4_test
        options: >-
          --health-cmd="mysqladmin ping"
          --health-interval=10s
          --health-timeout=5s
          --health-retries=3

      redis:
        image: redis:7
        options: >-
          --health-cmd="redis-cli ping"
          --health-interval=10s
          --health-timeout=5s
          --health-retries=3

    steps:
      - uses: actions/checkout@v3

      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: '18'
          cache: 'npm'

      - name: Install dependencies
        run: npm ci

      - name: Run database migrations
        run: npm run migrate:test
        env:
          DB_HOST: localhost
          DB_PORT: 3306
          DB_USERNAME: root
          DB_PASSWORD: test
          DB_DATABASE: altus4_test

      - name: Run integration tests
        run: npm run test:integration
        env:
          DB_HOST: localhost
          DB_PORT: 3306
          DB_USERNAME: root
          DB_PASSWORD: test
          DB_DATABASE: altus4_test
          REDIS_HOST: localhost
          REDIS_PORT: 6379

  performance-tests:
    runs-on: ubuntu-latest
    if: github.event_name == 'push' && github.ref == 'refs/heads/main'

    steps:
      - uses: actions/checkout@v3

      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: '18'
          cache: 'npm'

      - name: Install dependencies
        run: npm ci

      - name: Run performance tests
        run: npm run test:performance

      - name: Upload performance results
        uses: actions/upload-artifact@v3
        with:
          name: performance-results
          path: performance-results.json

Test Scripts Configuration ​

json
{
  "scripts": {
    "test": "npm run test:unit && npm run test:integration",
    "test:unit": "jest --config jest.config.js",
    "test:integration": "jest --config jest.integration.config.js",
    "test:performance": "jest --config jest.performance.config.js",
    "test:e2e": "jest --config jest.e2e.config.js",
    "test:watch": "jest --watch",
    "test:coverage": "jest --coverage",
    "test:ci": "jest --ci --coverage --watchAll=false"
  }
}

Quality Gates & Metrics ​

Coverage Requirements ​

javascript
// jest.config.js
module.exports = {
  coverageThreshold: {
    global: {
      branches: 90,
      functions: 90,
      lines: 90,
      statements: 90,
    },
    // Critical components require higher coverage
    'src/services/SearchService.ts': {
      branches: 95,
      functions: 95,
      lines: 95,
      statements: 95,
    },
    'src/services/DatabaseService.ts': {
      branches: 95,
      functions: 95,
      lines: 95,
      statements: 95,
    },
  },
};

Performance Benchmarks ​

typescript
// tests/performance/benchmarks.ts
export const performanceBenchmarks = {
  search: {
    averageResponseTime: 150, // ms
    p95ResponseTime: 300, // ms
    p99ResponseTime: 500, // ms
    throughput: 1000, // requests per second
    errorRate: 0.01, // 1% error rate
  },

  database: {
    connectionTime: 50, // ms
    queryTime: 100, // ms
    poolUtilization: 0.8, // 80% max utilization
  },

  cache: {
    hitRate: 0.85, // 85% cache hit rate
    responseTime: 5, // ms
    memoryUsage: 100, // MB max
  },
};

Test Reporting & Analytics ​

Custom Test Reporters ​

typescript
// tests/config/custom-reporter.ts
class CustomTestReporter {
  onRunComplete(contexts: Set<Context>, results: AggregatedResult) {
    const summary = {
      totalTests: results.numTotalTests,
      passedTests: results.numPassedTests,
      failedTests: results.numFailedTests,
      coverage: results.coverageMap?.getCoverageSummary(),
      duration: results.runTime,
      timestamp: new Date().toISOString(),
    };

    // Send to monitoring system
    this.sendToMonitoring(summary);

    // Generate detailed report
    this.generateDetailedReport(results);
  }

  private sendToMonitoring(summary: TestSummary) {
    // Implementation for sending metrics to monitoring system
  }

  private generateDetailedReport(results: AggregatedResult) {
    // Generate HTML/JSON reports
  }
}

Best Practices Summary ​

Testing Guidelines ​

  1. Write Tests First: Follow TDD when possible
  2. Test Behavior, Not Implementation: Focus on what the code does, not how
  3. Keep Tests Simple: Each test should verify one specific behavior
  4. Use Descriptive Names: Test names should clearly describe the scenario
  5. Maintain Test Independence: Tests should not depend on each other
  6. Mock External Dependencies: Isolate the code under test
  7. Test Edge Cases: Include boundary conditions and error scenarios
  8. Keep Tests Fast: Unit tests should run in milliseconds
  9. Regular Test Maintenance: Update tests when code changes
  10. Monitor Test Quality: Track coverage, flakiness, and performance

Quality Metrics ​

  • Code Coverage: Minimum 90% for critical components
  • Test Performance: Unit tests < 1ms, Integration tests < 100ms
  • Test Reliability: < 1% flaky test rate
  • Maintenance: Tests updated within same PR as code changes

A comprehensive testing strategy ensures Altus 4's reliability, performance, and maintainability. Follow these guidelines to build a robust test suite that supports confident development and deployment.