Neo4j Memory Server

/** * Error Resilience Tests - Production Edge Cases * Strategic coverage for critical error paths to improve overall coverage */ import { describe, it, expect, vi, beforeEach } from 'vitest'; import { XenovaEmbeddingService } from '../../src/infrastructure/services/embedding-service'; import { QueryClassifier } from '../../src/infrastructure/services/search/query-classifier'; import { ContextLevelProcessor } from '../../src/application/unified-handlers/services/context-level-processor'; import { DateFilterProcessor } from '../../src/application/unified-handlers/services/date-filter-processor'; import { LocalIdResolver } from '../../src/application/unified-handlers/services/local-id-resolver'; import { SearchMemoriesUseCase } from '../../src/application/use-cases/search-memories'; import { generateCompactId } from '../../src/id_generator'; describe('Error Resilience - Production Edge Cases', () => { describe('Embedding Service Error Paths', () => { let embeddingService: XenovaEmbeddingService; beforeEach(() => { embeddingService = new XenovaEmbeddingService(); }); it('should handle model loading failures gracefully', async () => { // Mock the embedding manager to throw error const mockManager = vi.spyOn(embeddingService as any, 'embeddingManager', 'get'); mockManager.mockReturnValue({ calculateEmbedding: vi.fn().mockRejectedValue(new Error('Model failed to load')), calculateSimilarity: vi.fn(), getModelDimensions: vi.fn(), preloadModel: vi.fn(), shutdown: vi.fn() }); await expect(embeddingService.calculateEmbedding('test')).rejects.toThrow('Model failed to load'); }); it('should handle dimension calculation failures', async () => { const mockManager = vi.spyOn(embeddingService as any, 'embeddingManager', 'get'); mockManager.mockReturnValue({ calculateEmbedding: vi.fn(), calculateSimilarity: vi.fn(), getModelDimensions: vi.fn().mockRejectedValue(new Error('Dimension calculation failed')), preloadModel: vi.fn(), shutdown: vi.fn() }); await expect(embeddingService.getModelDimensions()).rejects.toThrow('Dimension calculation failed'); }); }); describe('Query Classification Edge Cases', () => { let classifier: QueryClassifier; beforeEach(() => { classifier = new QueryClassifier(); }); it('should reject null queries', () => { expect(() => classifier.classify(null as any)).toThrow('Query must be a non-empty string'); }); it('should reject undefined queries', () => { expect(() => classifier.classify(undefined as any)).toThrow('Query must be a non-empty string'); }); it('should reject non-string queries', () => { expect(() => classifier.classify(123 as any)).toThrow('Query must be a non-empty string'); expect(() => classifier.classify({} as any)).toThrow('Query must be a non-empty string'); expect(() => classifier.classify([] as any)).toThrow('Query must be a non-empty string'); }); it('should handle empty string queries', () => { // Empty string with just spaces should throw expect(() => classifier.classify(' ')).toThrow('Query must be a non-empty string'); }); it('should handle very long queries gracefully', () => { const veryLongQuery = 'a'.repeat(10000); const result = classifier.classify(veryLongQuery); expect(result.type).toBeDefined(); expect(result.confidence).toBeGreaterThan(0); }); }); describe('Context Level Processor Edge Cases', () => { let processor: ContextLevelProcessor; beforeEach(() => { processor = new ContextLevelProcessor(); }); it('should reject invalid context levels', () => { expect(() => processor.validateContextLevel('invalid')).toThrow('Invalid context level: invalid'); }); it('should handle empty context level strings', () => { expect(() => processor.validateContextLevel('')).toThrow('Invalid context level: '); }); it('should handle null context levels', () => { expect(() => processor.validateContextLevel(null as any)).toThrow('Invalid context level: null'); }); it('should process malformed memory results gracefully', () => { const malformedResults = [ { id: 'valid1', name: 'test', memoryType: 'test' }, // Valid entry { id: 'valid2', name: 'test2', memoryType: 'test' } // Another valid entry ] as any[]; // Should process valid entries without throwing const result = processor.applyContextLevel(malformedResults, 'minimal'); expect(Array.isArray(result)).toBe(true); expect(result).toHaveLength(2); expect(result[0]).toHaveProperty('id'); expect(result[0]).toHaveProperty('name'); expect(result[0]).toHaveProperty('memoryType'); }); }); describe('Date Filter Processor Edge Cases', () => { let processor: DateFilterProcessor; beforeEach(() => { processor = new DateFilterProcessor(); }); it('should handle conflicting date ranges', () => { const filters = { createdAfter: '2025-01-01', createdBefore: '2024-01-01' // Before the after date }; // Date filter processor validates during filter processing expect(() => processor.validateDateFilters(filters)).toThrow('createdAfter must be earlier than createdBefore'); }); it('should reject invalid ISO date formats', () => { const filters = { createdAfter: 'not-a-date' }; expect(() => processor.processDateFilters(filters)).toThrow('Invalid date format: not-a-date'); }); it('should reject invalid relative formats', () => { const filters = { createdAfter: '5x' // Invalid unit }; expect(() => processor.processDateFilters(filters)).toThrow('Invalid date format: 5x'); }); it('should handle extreme date values', () => { const filters = { createdAfter: '1900-01-01', createdBefore: '2099-12-31' }; const result = processor.processDateFilters(filters); expect(result.cypher).toContain('createdAfter'); expect(result.cypher).toContain('createdBefore'); }); }); describe('Local ID Resolver Edge Cases', () => { let resolver: LocalIdResolver; beforeEach(() => { resolver = new LocalIdResolver(); }); it('should detect duplicate local IDs within request', () => { const memories = [ { localId: 'mem1', name: 'Memory 1' }, { localId: 'mem1', name: 'Memory 2' }, // Duplicate { localId: 'mem2', name: 'Memory 3' } ]; expect(() => resolver.validateLocalIds(memories)).toThrow('Duplicate localId "mem1" in request'); }); it('should reject local IDs that look like real memory IDs', () => { // Generate a real-looking memory ID const realLookingId = generateCompactId(); const memories = [ { localId: realLookingId, name: 'Memory 1' } ]; expect(() => resolver.validateLocalIds(memories)).toThrow('Local ID cannot look like real memory ID'); }); it('should handle relations with undefined IDs', () => { const relations = [ { from: undefined, to: 'mem2', type: 'RELATES_TO' } ] as any[]; const mapping = new Map<string, string>(); expect(() => resolver.resolveMemoryRequest(relations, mapping)).toThrow('ID cannot be undefined in relation'); }); it('should provide helpful error for unresolved local IDs', () => { const relations = [ { from: 'unknown-local', to: 'mem2', type: 'RELATES_TO' } ]; const mapping = new Map<string, string>([['mem2', 'real-id-2']]); expect(() => resolver.resolveMemoryRequest(relations, mapping)).toThrow('LocalId "unknown-local" not found'); }); }); describe('Search Use Case Error Handling', () => { it('should validate search request parameters', async () => { const mockRepository = { search: vi.fn() }; const searchUseCase = new SearchMemoriesUseCase(mockRepository as any); // Test empty query await expect(searchUseCase.execute({ query: '' })).rejects.toThrow('Search query is required'); // Test null query await expect(searchUseCase.execute({ query: null as any })).rejects.toThrow('Search query is required'); // Test negative limit await expect(searchUseCase.execute({ query: 'test', limit: -1 })).rejects.toThrow('Search limit must be positive'); // Test zero limit await expect(searchUseCase.execute({ query: 'test', limit: 0 })).rejects.toThrow('Search limit must be positive'); // Test invalid threshold await expect(searchUseCase.execute({ query: 'test', threshold: 1.5 })).rejects.toThrow('Search threshold must be between 0 and 1'); await expect(searchUseCase.execute({ query: 'test', threshold: -0.1 })).rejects.toThrow('Search threshold must be between 0 and 1'); }); }); describe('ID Generator Edge Cases', () => { it('should generate unique IDs under stress', () => { const ids = new Set<string>(); const count = 1000; // Generate many IDs quickly to test uniqueness for (let i = 0; i < count; i++) { const id = generateCompactId(); expect(id).toHaveLength(18); expect(ids.has(id)).toBe(false); // Should be unique ids.add(id); } expect(ids.size).toBe(count); }); it('should generate valid BASE85 character sets', () => { const validChars = /^[0-9A-Za-z!#$%&()*+,\-./:;=?@_{}~`]+$/; for (let i = 0; i < 100; i++) { const id = generateCompactId(); expect(id).toMatch(validChars); expect(id).toHaveLength(18); } }); }); describe('Memory Pressure Scenarios', () => { it('should handle large batch operations gracefully', () => { // Test with very large arrays const processor = new ContextLevelProcessor(); // Create a large result set const largeResults = Array.from({ length: 10000 }, (_, i) => ({ id: `mem-${i}`, name: `Memory ${i}`, memoryType: 'test', score: Math.random() })); const result = processor.applyContextLevel(largeResults, 'minimal'); expect(result).toHaveLength(10000); expect(result[0]).toHaveProperty('id'); expect(result[0]).toHaveProperty('name'); expect(result[0]).toHaveProperty('memoryType'); }); it('should handle deeply nested metadata structures', () => { const processor = new ContextLevelProcessor(); const deepMetadata = { level1: { level2: { level3: { level4: { level5: 'deep value' } } } }, array: new Array(1000).fill('test'), largeString: 'x'.repeat(100000) }; const result = processor.applyContextLevel([{ id: 'test', name: 'test', memoryType: 'test', metadata: deepMetadata }], 'full'); expect(result).toHaveLength(1); expect(result[0].metadata).toEqual(deepMetadata); }); }); describe('Concurrent Operation Safety', () => { it('should handle concurrent ID generation safely', async () => { const concurrentGenerations = await Promise.all( Array.from({ length: 100 }, () => Promise.resolve(generateCompactId()) ) ); const uniqueIds = new Set(concurrentGenerations); expect(uniqueIds.size).toBe(100); // All should be unique }); it('should handle concurrent validation calls', async () => { const processor = new ContextLevelProcessor(); const concurrentValidations = await Promise.all( Array.from({ length: 50 }, () => Promise.resolve(processor.validateContextLevel('minimal')) ) ); concurrentValidations.forEach(result => { expect(result).toBe('minimal'); }); }); }); });