/** * Comprehensive TDD Test Suite for Mariner Automation * * Following London School TDD with emphasis on behavior verification * for browser automation, task orchestration, and AI-driven testing. * * RED-GREEN-REFACTOR CYCLE: * Focus on automation workflow coordination, browser session management, * and task execution patterns with comprehensive error handling. */ import { describe, it, expect, beforeEach, afterEach, jest, } from "@jest/globals"; import { EventEmitter } from "events"; import { MarinerAutomation } from "../mariner-automation.js"; import { MockFactory, TestDataGenerator, MockBuilder, ContractTester, PerformanceTester, ErrorScenarioTester, } from "./test-utilities.js"; // Mock external dependencies following London School principles jest.mock("../../../utils/logger.js"); jest.mock("../../../adapters/browser-adapter.js"); jest.mock("../../../ai/task-optimizer.js"); describe("MarinerAutomation - London School TDD", () => { let marinerAutomation: MarinerAutomation; let mockConfig: any; let mockLogger: jest.Mocked; let mockTaskQueue: jest.Mocked; let mockTaskScheduler: jest.Mocked; let mockAIEngine: jest.Mocked; let mockBrowserMonitoring: jest.Mocked; let mockPluginManager: jest.Mocked; let mockResourceManager: jest.Mocked; let mockBuilder: MockBuilder; beforeEach(() => { // Setup comprehensive mock configuration mockConfig = { browser: { engine: "chromium", headless: true, devtools: false, proxy: undefined, userAgent: "Mozilla/5.0 (Test Browser)", viewport: { width: 1920, height: 1080, deviceScaleFactor: 1, isMobile: false, hasTouch: false, isLandscape: true, }, performance: { cpuThrottling: 1, networkThrottling: undefined, cacheDisabled: false, javascriptEnabled: true, imagesEnabled: true, }, }, orchestration: { maxConcurrentBrowsers: 5, taskQueue: { maxSize: 100, priority: "fifo", timeout: 300000, retries: 3, }, scheduling: { algorithm: "round_robin", loadBalancing: true, affinity: false, }, resourceManagement: { memoryLimit: 8192, cpuLimit: 80, diskSpace: 10240, cleanupInterval: 60, }, }, ai: { enabled: true, model: "mariner-optimization-v2", capabilities: [ { name: "element_detection", type: "vision", confidence: 0.9, fallback: "xpath_selector", }, { name: "task_optimization", type: "prediction", confidence: 0.85, fallback: "rule_based", }, ], learning: { enabled: true, dataCollection: true, modelUpdates: false, feedbackLoop: true, }, }, monitoring: { performance: true, screenshots: true, videos: false, networkLogs: true, consoleLogs: true, metrics: { loadTime: true, networkRequests: true, memoryUsage: true, cpuUsage: true, errors: true, }, }, plugins: [], }; mockBuilder = new MockBuilder(); // Setup Logger mock mockLogger = mockBuilder .mockFunction("info", jest.fn()) .mockFunction("debug", jest.fn()) .mockFunction("warn", jest.fn()) .mockFunction("error", jest.fn()) .build() as any; // Setup TaskQueue mock mockTaskQueue = { enqueue: jest.fn().mockResolvedValue(undefined), dequeue: jest.fn().mockResolvedValue({ id: "task-123", task: MockFactory.createAutomationTask(), status: "pending", }), getExecution: jest.fn().mockResolvedValue({ id: "task-123", status: "running", startTime: new Date(), progress: 50, }), cancel: jest.fn().mockResolvedValue(undefined), stop: jest.fn().mockResolvedValue(undefined), size: jest.fn().mockReturnValue(5), on: jest.fn(), emit: jest.fn(), }; // Setup TaskScheduler mock mockTaskScheduler = { schedule: jest.fn().mockImplementation((execution) => { execution.status = "running"; execution.startTime = new Date(); }), getNextTask: jest.fn().mockReturnValue({ id: "scheduled-task-123", priority: 1, }), reschedule: jest.fn(), cancel: jest.fn(), }; // Setup AIEngine mock mockAIEngine = { initialize: jest.fn().mockResolvedValue(undefined), shutdown: jest.fn().mockResolvedValue(undefined), optimizeTask: jest.fn().mockImplementation(async (task) => ({ ...task, optimized: true, aiEnhanced: true, })), predictElementLocation: jest.fn().mockResolvedValue({ selector: "#predicted-element", confidence: 0.92, coordinates: { x: 100, y: 200 }, }), analyzePerformance: jest.fn().mockResolvedValue({ bottlenecks: ["slow_network"], recommendations: ["enable_compression"], score: 85, }), }; // Setup BrowserMonitoring mock mockBrowserMonitoring = { start: jest.fn().mockResolvedValue(undefined), stop: jest.fn().mockResolvedValue(undefined), getMetrics: jest .fn() .mockResolvedValue(MockFactory.createPerformanceMetrics()), recordPageLoad: jest.fn(), recordUserAction: jest.fn(), recordError: jest.fn(), takeScreenshot: jest.fn().mockReturnValue("screenshot-data"), on: jest.fn(), emit: jest.fn(), }; // Setup PluginManager mock mockPluginManager = { initialize: jest.fn().mockResolvedValue(undefined), shutdown: jest.fn().mockResolvedValue(undefined), loadPlugin: jest.fn().mockResolvedValue(undefined), executePlugin: jest.fn().mockResolvedValue({ success: true }), }; // Setup ResourceManager mock mockResourceManager = { start: jest.fn().mockResolvedValue(undefined), stop: jest.fn().mockResolvedValue(undefined), getResourceUsage: jest.fn().mockReturnValue({ memory: 4096, cpu: 45, disk: 2048, }), checkResourceLimits: jest.fn().mockReturnValue(true), cleanup: jest.fn().mockResolvedValue(undefined), on: jest.fn(), emit: jest.fn(), }; // Mock constructor dependencies jest.mocked(require("../../../utils/logger.js")).Logger = jest .fn() .mockImplementation(() => mockLogger); // Create MarinerAutomation instance marinerAutomation = new MarinerAutomation(mockConfig); // Inject mocks (marinerAutomation as any).taskQueue = mockTaskQueue; (marinerAutomation as any).scheduler = mockTaskScheduler; (marinerAutomation as any).aiEngine = mockAIEngine; (marinerAutomation as any).monitoringService = mockBrowserMonitoring; (marinerAutomation as any).pluginManager = mockPluginManager; (marinerAutomation as any).resourceManager = mockResourceManager; }); afterEach(() => { jest.clearAllMocks(); mockBuilder.clear(); }); // ==================== INITIALIZATION BEHAVIOR ==================== describe("Initialization and Component Orchestration", () => { it("should coordinate initialization of all subsystems", async () => { // ARRANGE const initializeSpy = jest.spyOn(marinerAutomation, "initialize"); // ACT await marinerAutomation.initialize(); // ASSERT - Verify initialization coordination expect(initializeSpy).toHaveBeenCalledTimes(1); expect(mockAIEngine.initialize).toHaveBeenCalled(); expect(mockPluginManager.initialize).toHaveBeenCalled(); expect(mockBrowserMonitoring.start).toHaveBeenCalled(); expect(mockResourceManager.start).toHaveBeenCalled(); expect(mockLogger.info).toHaveBeenCalledWith( "Mariner Automation Engine initialized", ); }); it("should handle initialization failure with proper error propagation", async () => { // ARRANGE const initError = new Error("AI Engine initialization failed"); mockAIEngine.initialize.mockRejectedValueOnce(initError); // ACT & ASSERT await expect(marinerAutomation.initialize()).rejects.toThrow( "AI Engine initialization failed", ); expect(mockLogger.error).toHaveBeenCalledWith( "Failed to initialize automation engine", initError, ); }); it("should establish event handler contracts during initialization", async () => { // ACT await marinerAutomation.initialize(); // ASSERT - Verify event handler coordination expect(mockTaskQueue.on).toHaveBeenCalledWith( "task:ready", expect.any(Function), ); expect(mockResourceManager.on).toHaveBeenCalledWith( "resource:low", expect.any(Function), ); expect(mockBrowserMonitoring.on).toHaveBeenCalledWith( "performance:degraded", expect.any(Function), ); }); }); // ==================== TASK SUBMISSION AND ORCHESTRATION ==================== describe("Task Submission and Queue Management", () => { beforeEach(async () => { await marinerAutomation.initialize(); }); it("should coordinate task submission with validation and optimization", async () => { // ARRANGE const automationTask = MockFactory.createAutomationTask(); const submitSpy = jest.spyOn(marinerAutomation, "submitTask"); // ACT const result = await marinerAutomation.submitTask(automationTask); // ASSERT - Verify submission coordination expect(result.success).toBe(true); expect(result.data).toBe(automationTask.id); expect(submitSpy).toHaveBeenCalledWith(automationTask); expect(mockAIEngine.optimizeTask).toHaveBeenCalledWith(automationTask); expect(mockTaskQueue.enqueue).toHaveBeenCalled(); expect(mockLogger.info).toHaveBeenCalledWith( "Submitting automation task", expect.objectContaining({ taskId: automationTask.id, name: automationTask.name, }), ); }); it("should validate task structure before submission", async () => { // ARRANGE const invalidTask = { id: "", // Invalid ID name: "", steps: [], // No steps conditions: null, timeout: -1, // Invalid timeout }; // ACT const result = await marinerAutomation.submitTask(invalidTask as any); // ASSERT expect(result.success).toBe(false); expect(result.error?.code).toBe("TASK_SUBMISSION_FAILED"); expect(mockLogger.error).toHaveBeenCalled(); }); it("should coordinate task optimization with AI when enabled", async () => { // ARRANGE const originalTask = MockFactory.createAutomationTask(); const optimizedTask = { ...originalTask, optimized: true, aiEnhanced: true, steps: [ ...originalTask.steps, { type: "ai_enhanced_wait", value: "smart_wait", timeout: 5000, }, ], }; mockAIEngine.optimizeTask.mockResolvedValueOnce(optimizedTask); // ACT const result = await marinerAutomation.submitTask(originalTask); // ASSERT expect(result.success).toBe(true); expect(mockAIEngine.optimizeTask).toHaveBeenCalledWith(originalTask); expect(mockTaskQueue.enqueue).toHaveBeenCalledWith( expect.objectContaining({ task: expect.objectContaining({ optimized: true, aiEnhanced: true, }), }), ); }); }); // ==================== TASK EXECUTION BEHAVIOR ==================== describe("Task Execution Orchestration", () => { beforeEach(async () => { await marinerAutomation.initialize(); }); it("should coordinate browser acquisition and task execution", async () => { // ARRANGE const automationTask = MockFactory.createAutomationTask(); const mockBrowser = createMockBrowserSession(); jest .spyOn(marinerAutomation as any, "acquireBrowser") .mockResolvedValue(mockBrowser); // ACT const result = await marinerAutomation.executeTask(automationTask); // ASSERT - Verify execution coordination expect(result.success).toBe(true); expect(result.data.success).toBe(true); expect(mockBrowser.markBusy).toHaveBeenCalled(); expect(mockBrowser.markAvailable).toHaveBeenCalled(); expect(mockBrowserMonitoring.recordUserAction).toHaveBeenCalled(); expect(mockLogger.info).toHaveBeenCalledWith( "Executing automation task", expect.objectContaining({ taskId: automationTask.id, name: automationTask.name, }), ); }); it("should handle browser acquisition failure with proper error handling", async () => { // ARRANGE const automationTask = MockFactory.createAutomationTask(); const acquisitionError = new Error("No browsers available"); jest .spyOn(marinerAutomation as any, "acquireBrowser") .mockRejectedValue(acquisitionError); // ACT const result = await marinerAutomation.executeTask(automationTask); // ASSERT expect(result.success).toBe(false); expect(result.error?.code).toBe("TASK_EXECUTION_FAILED"); expect(mockLogger.error).toHaveBeenCalledWith( "Task execution failed", expect.objectContaining({ taskId: automationTask.id, }), ); }); it("should coordinate step execution with condition validation", async () => { // ARRANGE const taskWithConditions = { ...MockFactory.createAutomationTask(), conditions: [ { type: "element_present", selector: "#success-message", value: undefined, }, { type: "url_matches", selector: undefined, value: "/success", }, ], }; const mockBrowser = createMockBrowserSession(); jest .spyOn(marinerAutomation as any, "acquireBrowser") .mockResolvedValue(mockBrowser); // Mock condition evaluation jest .spyOn(marinerAutomation as any, "evaluateCondition") .mockResolvedValue(true); // ACT const result = await marinerAutomation.executeTask(taskWithConditions); // ASSERT expect(result.success).toBe(true); expect(mockBrowser.isElementPresent).toHaveBeenCalledWith( "#success-message", ); expect(mockBrowser.getCurrentUrl).toHaveBeenCalled(); }); it("should coordinate screenshot capture during monitoring", async () => { // ARRANGE const automationTask = MockFactory.createAutomationTask(); const mockBrowser = createMockBrowserSession(); jest .spyOn(marinerAutomation as any, "acquireBrowser") .mockResolvedValue(mockBrowser); // ACT const result = await marinerAutomation.executeTask(automationTask); // ASSERT expect(result.success).toBe(true); expect(mockBrowser.enableScreenshots).toHaveBeenCalled(); expect(mockBrowser.takeScreenshot).toHaveBeenCalled(); expect(result.data.screenshots).toContain("screenshot-data"); }); }); // ==================== BROWSER SESSION MANAGEMENT ==================== describe("Browser Session Pool Management", () => { beforeEach(async () => { await marinerAutomation.initialize(); }); it("should coordinate browser session creation and management", async () => { // ARRANGE const sessionCount = 3; const sessions: any[] = []; // Mock browser creation jest .spyOn(marinerAutomation as any, "createBrowser") .mockImplementation(() => { const session = createMockBrowserSession(); sessions.push(session); return Promise.resolve(session); }); // ACT - Create multiple sessions const promises = Array.from({ length: sessionCount }, (_, i) => (marinerAutomation as any).acquireBrowser(), ); const acquiredSessions = await Promise.all(promises); // ASSERT expect(acquiredSessions).toHaveLength(sessionCount); expect(sessions.every((s) => s.launch)).toHaveBeenCalled(); expect(mockLogger.debug).toHaveBeenCalledWith( "Created new browser session", expect.objectContaining({ browserId: expect.any(String) }), ); }); it("should coordinate browser session cleanup and resource release", async () => { // ARRANGE const mockBrowser = createMockBrowserSession(); mockBrowser.needsCleanup.mockResolvedValue(true); jest .spyOn(marinerAutomation as any, "getAvailableBrowser") .mockReturnValue(mockBrowser); // ACT const browser = await (marinerAutomation as any).acquireBrowser(); await (marinerAutomation as any).releaseBrowser(browser); // ASSERT expect(browser.markAvailable).toHaveBeenCalled(); expect(browser.needsCleanup).toHaveBeenCalled(); expect(browser.cleanup).toHaveBeenCalled(); }); it("should handle browser pool exhaustion with waiting coordination", async () => { // ARRANGE const maxBrowsers = mockConfig.orchestration.maxConcurrentBrowsers; // Mock pool exhaustion jest .spyOn(marinerAutomation as any, "getAvailableBrowser") .mockReturnValue(null); jest .spyOn(marinerAutomation as any, "browsers", "get") .mockReturnValue( new Map( Array.from({ length: maxBrowsers }, (_, i) => [ `browser-${i}`, { isBusy: () => true }, ]), ), ); // Mock waiting behavior jest .spyOn(marinerAutomation as any, "waitForAvailableBrowser") .mockResolvedValue(createMockBrowserSession()); // ACT const browser = await (marinerAutomation as any).acquireBrowser(); // ASSERT expect(browser).toBeDefined(); expect( (marinerAutomation as any).waitForAvailableBrowser, ).toHaveBeenCalled(); }); }); // ==================== AI INTEGRATION BEHAVIOR ==================== describe("AI Engine Integration and Optimization", () => { beforeEach(async () => { await marinerAutomation.initialize(); }); it("should coordinate AI-powered element detection with fallback", async () => { // ARRANGE const taskWithSmartSelectors = { ...MockFactory.createAutomationTask(), steps: [ { type: "click", selector: "ai:submit_button", // AI-enhanced selector timeout: 5000, }, ], }; const mockBrowser = createMockBrowserSession(); jest .spyOn(marinerAutomation as any, "acquireBrowser") .mockResolvedValue(mockBrowser); // ACT const result = await marinerAutomation.executeTask( taskWithSmartSelectors, ); // ASSERT expect(result.success).toBe(true); expect(mockAIEngine.predictElementLocation).toHaveBeenCalledWith( "submit_button", expect.any(Object), // Browser context ); expect(mockBrowser.click).toHaveBeenCalledWith( "#predicted-element", expect.any(Number), ); }); it("should coordinate performance analysis with AI insights", async () => { // ARRANGE const performanceTask = MockFactory.createAutomationTask(); const mockBrowser = createMockBrowserSession(); jest .spyOn(marinerAutomation as any, "acquireBrowser") .mockResolvedValue(mockBrowser); // ACT const result = await marinerAutomation.executeTask(performanceTask); // ASSERT expect(result.success).toBe(true); expect(mockAIEngine.analyzePerformance).toHaveBeenCalled(); expect(mockLogger.debug).toHaveBeenCalledWith( "AI performance analysis completed", expect.objectContaining({ score: 85, recommendations: ["enable_compression"], }), ); }); it("should handle AI service failures with graceful degradation", async () => { // ARRANGE const aiFailureTask = MockFactory.createAutomationTask(); const aiError = new Error("AI service unavailable"); mockAIEngine.optimizeTask.mockRejectedValueOnce(aiError); // ACT const result = await marinerAutomation.submitTask(aiFailureTask); // ASSERT - Should continue without AI optimization expect(result.success).toBe(true); expect(mockLogger.warn).toHaveBeenCalledWith( "AI optimization failed, proceeding without optimization", aiError, ); expect(mockTaskQueue.enqueue).toHaveBeenCalled(); }); }); // ==================== PERFORMANCE MONITORING ==================== describe("Performance Monitoring and Resource Management", () => { beforeEach(async () => { await marinerAutomation.initialize(); }); it("should coordinate performance metrics collection during execution", async () => { // ARRANGE const performanceTask = MockFactory.createAutomationTask(); const mockBrowser = createMockBrowserSession(); jest .spyOn(marinerAutomation as any, "acquireBrowser") .mockResolvedValue(mockBrowser); // ACT const result = await marinerAutomation.executeTask(performanceTask); const metrics = await marinerAutomation.getMetrics(); // ASSERT expect(result.success).toBe(true); expect(mockBrowserMonitoring.getMetrics).toHaveBeenCalled(); ContractTester.validatePerformanceMetrics(metrics.data); expect(mockBrowserMonitoring.recordUserAction).toHaveBeenCalled(); }); it("should handle resource exhaustion with proper throttling", async () => { // ARRANGE const resourceIntensiveTask = MockFactory.createAutomationTask(); mockResourceManager.checkResourceLimits.mockReturnValue(false); // Resource limit exceeded mockResourceManager.getResourceUsage.mockReturnValue({ memory: 7500, // Near limit cpu: 85, // High usage disk: 9000, // Near limit }); // ACT const result = await marinerAutomation.executeTask(resourceIntensiveTask); // ASSERT expect(result.success).toBe(false); expect(result.error?.code).toBe("RESOURCE_LIMIT_EXCEEDED"); expect(mockLogger.warn).toHaveBeenCalledWith( "Resource limits exceeded, throttling execution", expect.objectContaining({ usage: expect.any(Object), }), ); }); it("should coordinate resource cleanup on low resource events", async () => { // ARRANGE const lowResourceEvent = { type: "memory_low", threshold: 90, current: 95, timestamp: new Date(), }; // ACT (marinerAutomation as any).handleLowResources(lowResourceEvent); // ASSERT expect(mockResourceManager.cleanup).toHaveBeenCalled(); expect(mockLogger.warn).toHaveBeenCalledWith( "Low resources detected", lowResourceEvent, ); }); }); // ==================== ERROR HANDLING AND RECOVERY ==================== describe("Error Handling and Recovery Coordination", () => { beforeEach(async () => { await marinerAutomation.initialize(); }); it("should coordinate retry logic with exponential backoff", async () => { // ARRANGE const flakyTask = MockFactory.createAutomationTask(); const transientError = new Error("Network timeout"); let attemptCount = 0; const mockBrowser = createMockBrowserSession(); mockBrowser.navigate.mockImplementation(() => { attemptCount++; if (attemptCount < 3) { throw transientError; } return Promise.resolve(); }); jest .spyOn(marinerAutomation as any, "acquireBrowser") .mockResolvedValue(mockBrowser); // ACT const result = await marinerAutomation.executeTask(flakyTask); // ASSERT expect(result.success).toBe(true); expect(attemptCount).toBe(3); // Verified retry behavior expect(mockLogger.warn).toHaveBeenCalledWith( "Step execution failed, retrying", expect.objectContaining({ attempt: expect.any(Number), error: transientError, }), ); }); it("should coordinate browser crash recovery", async () => { // ARRANGE const crashTask = MockFactory.createAutomationTask(); const crashError = new Error("Browser process crashed"); const mockBrowser = createMockBrowserSession(); mockBrowser.navigate.mockRejectedValue(crashError); jest .spyOn(marinerAutomation as any, "acquireBrowser") .mockResolvedValue(mockBrowser); // ACT const result = await marinerAutomation.executeTask(crashTask); // ASSERT expect(result.success).toBe(false); expect(mockBrowser.cleanup).toHaveBeenCalled(); expect(mockLogger.error).toHaveBeenCalledWith( "Browser session crashed, cleaning up", expect.objectContaining({ error: crashError, }), ); }); it("should handle task cancellation with resource cleanup", async () => { // ARRANGE const taskId = "cancellable-task-123"; mockTaskQueue.getExecution.mockResolvedValue({ id: taskId, status: "running", startTime: new Date(), }); // ACT const result = await marinerAutomation.cancelTask(taskId); // ASSERT expect(result.success).toBe(true); expect(mockTaskQueue.cancel).toHaveBeenCalledWith(taskId); expect(mockLogger.info).toHaveBeenCalledWith( "Cancelling task", expect.objectContaining({ taskId }), ); }); }); // ==================== PLUGIN SYSTEM COORDINATION ==================== describe("Plugin System Integration", () => { beforeEach(async () => { await marinerAutomation.initialize(); }); it("should coordinate plugin execution during task processing", async () => { // ARRANGE const taskWithPlugins = { ...MockFactory.createAutomationTask(), plugins: ["screenshot-enhancer", "data-validator"], }; const mockBrowser = createMockBrowserSession(); jest .spyOn(marinerAutomation as any, "acquireBrowser") .mockResolvedValue(mockBrowser); // ACT const result = await marinerAutomation.executeTask(taskWithPlugins); // ASSERT expect(result.success).toBe(true); expect(mockPluginManager.executePlugin).toHaveBeenCalledWith( "screenshot-enhancer", expect.any(Object), ); expect(mockPluginManager.executePlugin).toHaveBeenCalledWith( "data-validator", expect.any(Object), ); }); it("should handle plugin failures without affecting main execution", async () => { // ARRANGE const taskWithFailingPlugin = MockFactory.createAutomationTask(); const pluginError = new Error("Plugin execution failed"); mockPluginManager.executePlugin.mockRejectedValue(pluginError); const mockBrowser = createMockBrowserSession(); jest .spyOn(marinerAutomation as any, "acquireBrowser") .mockResolvedValue(mockBrowser); // ACT const result = await marinerAutomation.executeTask(taskWithFailingPlugin); // ASSERT expect(result.success).toBe(true); // Main execution should continue expect(mockLogger.warn).toHaveBeenCalledWith( "Plugin execution failed, continuing task", pluginError, ); }); }); // ==================== SHUTDOWN AND CLEANUP ==================== describe("Graceful Shutdown and Resource Cleanup", () => { it("should coordinate graceful shutdown of all subsystems", async () => { // ARRANGE await marinerAutomation.initialize(); const mockBrowser1 = createMockBrowserSession(); const mockBrowser2 = createMockBrowserSession(); // Mock active browsers jest.spyOn(marinerAutomation as any, "browsers", "get").mockReturnValue( new Map([ ["browser-1", mockBrowser1], ["browser-2", mockBrowser2], ]), ); // ACT await marinerAutomation.shutdown(); // ASSERT - Verify shutdown coordination expect(mockTaskQueue.stop).toHaveBeenCalled(); expect(mockBrowser1.close).toHaveBeenCalled(); expect(mockBrowser2.close).toHaveBeenCalled(); expect(mockBrowserMonitoring.stop).toHaveBeenCalled(); expect(mockResourceManager.stop).toHaveBeenCalled(); expect(mockPluginManager.shutdown).toHaveBeenCalled(); expect(mockAIEngine.shutdown).toHaveBeenCalled(); expect(mockLogger.info).toHaveBeenCalledWith( "Mariner Automation Engine shutdown complete", ); }); it("should handle shutdown errors gracefully", async () => { // ARRANGE await marinerAutomation.initialize(); const shutdownError = new Error("Component shutdown failed"); mockBrowserMonitoring.stop.mockRejectedValue(shutdownError); // ACT & ASSERT await expect(marinerAutomation.shutdown()).rejects.toThrow( "Component shutdown failed", ); expect(mockLogger.error).toHaveBeenCalledWith( "Error during shutdown", shutdownError, ); }); }); // ==================== PERFORMANCE CONTRACT TESTING ==================== describe("Performance Contract Validation", () => { beforeEach(async () => { await marinerAutomation.initialize(); }); it("should meet performance requirements for task submission", async () => { // ARRANGE & ACT const performanceTest = PerformanceTester.createPerformanceTest( "task_submission", () => marinerAutomation.submitTask(MockFactory.createAutomationTask()), 50, // 50ms max 5, // 5 iterations ); // ASSERT await performanceTest(); }); it("should maintain service response contracts", async () => { // ARRANGE & ACT const submitResult = await marinerAutomation.submitTask( MockFactory.createAutomationTask(), ); const statusResult = await marinerAutomation.getTaskStatus("task-123"); const metricsResult = await marinerAutomation.getMetrics(); // ASSERT ContractTester.validateServiceResponse(submitResult); ContractTester.validateServiceResponse(statusResult); ContractTester.validateServiceResponse(metricsResult); }); it("should validate event emitter contract for task coordination", async () => { // ARRANGE const expectedEvents = [ "task:submitted", "task:started", "task:completed", "task:failed", "task:cancelled", "browser:acquired", "browser:released", "performance:degraded", ]; // ACT & ASSERT ContractTester.validateEventEmitter(marinerAutomation, expectedEvents); }); }); }); // ==================== HELPER FUNCTIONS ==================== /** * Creates a comprehensive mock browser session for testing */ function createMockBrowserSession() { return { id: "mock-browser-123", launch: jest.fn().mockResolvedValue(undefined), close: jest.fn().mockResolvedValue(undefined), isBusy: jest.fn().mockReturnValue(false), markBusy: jest.fn(), markAvailable: jest.fn(), needsCleanup: jest.fn().mockResolvedValue(false), cleanup: jest.fn().mockResolvedValue(undefined), enableScreenshots: jest.fn().mockResolvedValue(undefined), enableNetworkLogging: jest.fn().mockResolvedValue(undefined), takeScreenshot: jest.fn().mockResolvedValue("screenshot-data"), navigate: jest.fn().mockResolvedValue(undefined), click: jest.fn().mockResolvedValue(undefined), type: jest.fn().mockResolvedValue(undefined), wait: jest.fn().mockResolvedValue(undefined), waitForElement: jest.fn().mockResolvedValue(undefined), extractData: jest.fn().mockResolvedValue({}), executeScript: jest.fn().mockResolvedValue({}), isElementPresent: jest.fn().mockResolvedValue(true), isElementVisible: jest.fn().mockResolvedValue(true), getText: jest.fn().mockResolvedValue("test text"), getCurrentUrl: jest.fn().mockResolvedValue("https://example.com/success"), getMemoryUsage: jest.fn().mockResolvedValue(512), getNetworkRequestCount: jest.fn().mockResolvedValue(15), }; } /** * RED-GREEN-REFACTOR CYCLE DOCUMENTATION FOR MARINER AUTOMATION: * * This test suite demonstrates comprehensive London School TDD for complex automation: * * 1. ORCHESTRATION TESTING: * - Tests focus on HOW MarinerAutomation coordinates between subsystems * - Browser session management, task queue coordination, AI integration * - Resource management and performance monitoring coordination * * 2. BEHAVIOR-DRIVEN MOCKING: * - All dependencies are mocked to isolate MarinerAutomation behavior * - Mocks verify interaction patterns, not implementation details * - Error injection tests verify recovery and cleanup coordination * * 3. COMPLEX WORKFLOW TESTING: * - Multi-step task execution with condition validation * - Browser pool management with resource constraints * - AI-enhanced automation with fallback strategies * * 4. LONDON SCHOOL PRINCIPLES: * - RED: Define expected coordination behavior through failing tests * - GREEN: Implement minimal orchestration logic to pass tests * - REFACTOR: Improve coordination patterns while maintaining contracts * * Key Collaboration Patterns Tested: * - TaskQueue ↔ TaskScheduler (task prioritization and execution) * - BrowserSession ↔ ResourceManager (resource allocation and limits) * - AIEngine ↔ TaskOptimizer (intelligent automation enhancement) * - PerformanceMonitor ↔ BrowserMonitoring (metrics collection and analysis) * - PluginManager ↔ TaskExecution (extensible automation capabilities) */