@clduab11/gemini-flow
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Revolutionary AI agent swarm coordination platform with Google Services integration, multimedia processing, and production-ready monitoring. Features 8 Google AI services, quantum computing capabilities, and enterprise-grade security.
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text/typescript
/**
* Comprehensive TDD Test Suite for Enhanced Streaming API
*
* Following London School TDD practices with mock-driven development,
* behavior verification, and 100% code coverage target.
*
* RED-GREEN-REFACTOR CYCLE DOCUMENTATION:
* 1. RED: Write failing test that describes desired behavior
* 2. GREEN: Write minimal code to make test pass
* 3. REFACTOR: Improve code structure while keeping tests green
*/
import {
describe,
it,
expect,
beforeEach,
afterEach,
jest,
} from "@jest/globals";
import { EventEmitter } from "events";
import { EnhancedStreamingAPI } from "../enhanced-streaming-api.js";
import {
MockFactory,
TestDataGenerator,
MockBuilder,
ContractTester,
PerformanceTester,
ErrorScenarioTester,
} from "./test-utilities.js";
// ==================== Mock Setup Following London School ====================
// Mock all external dependencies to focus on interactions
jest.mock("../../../adapters/unified-api.js");
jest.mock("../../../utils/logger.js");
describe("EnhancedStreamingAPI - London School TDD", () => {
let streamingAPI: EnhancedStreamingAPI;
let mockConfig: any;
let mockUnifiedAPI: jest.Mocked<any>;
let mockLogger: jest.Mocked<any>;
let mockBufferManager: jest.Mocked<any>;
let mockCompressionEngine: jest.Mocked<any>;
let mockPerformanceMonitor: jest.Mocked<any>;
let mockCircuitBreaker: jest.Mocked<any>;
let mockBuilder: MockBuilder;
beforeEach(() => {
// Setup comprehensive mock configuration
mockConfig = {
apiKey: TestDataGenerator.randomString(32),
projectId: TestDataGenerator.randomString(16),
region: "us-central1",
streaming: {
maxConcurrentStreams: 10,
defaultChunkSize: 8192,
compressionEnabled: true,
qualityAdaptation: true,
bufferSize: 32768,
maxRetries: 3,
buffer: {
maxSize: 1000,
strategy: "fifo",
},
compression: {
enabled: true,
algorithm: "gzip",
level: 6,
},
circuitBreaker: {
failureThreshold: 5,
timeout: 60000,
resetTimeout: 300000,
},
},
qualityProfiles: {
low: { bitrate: 500000, resolution: "480p" },
medium: { bitrate: 1000000, resolution: "720p" },
high: { bitrate: 2000000, resolution: "1080p" },
},
};
// Create mock builder for consistent mock creation
mockBuilder = new MockBuilder();
// Setup UnifiedAPI mock with all expected methods
mockUnifiedAPI =
mockBuilder
.mockResolves("initialize", undefined)
.mockResolves("shutdown", undefined)
.mockFunction("on", jest.fn())
.mockFunction("emit", jest.fn())
.getMock("initialize")!
.getMockImplementation()?.constructor || {};
// 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 internal component mocks
mockBufferManager = {
createBuffer: jest.fn().mockReturnValue({
enqueue: jest.fn().mockResolvedValue(undefined),
dequeue: jest
.fn()
.mockResolvedValue(MockFactory.createStreamChunk("test-data")),
hasData: jest.fn().mockReturnValue(true),
shouldPause: jest.fn().mockReturnValue(false),
getUtilization: jest.fn().mockReturnValue(50),
handleOverflow: jest.fn(),
cleanup: jest.fn(),
}),
getUtilization: jest.fn().mockReturnValue(60),
handleOverflow: jest.fn(),
cleanup: jest.fn(),
};
mockCompressionEngine = {
compress: jest.fn().mockResolvedValue("compressed-data"),
getCompressionInfo: jest.fn().mockReturnValue("gzip, ratio: 0.7"),
disableForStream: jest.fn(),
cleanup: jest.fn(),
};
mockPerformanceMonitor = {
recordChunk: jest.fn(),
recordError: jest.fn(),
recordStreamComplete: jest.fn(),
recordData: jest.fn(),
getCurrentThroughput: jest.fn().mockReturnValue(1000),
getCurrentLatency: jest.fn().mockReturnValue(50),
getErrorRate: jest.fn().mockReturnValue(0.01),
getStreamMetrics: jest.fn().mockReturnValue({
latency: 45,
errorRate: 0.005,
}),
getMetrics: jest
.fn()
.mockReturnValue(MockFactory.createPerformanceMetrics()),
};
mockCircuitBreaker = {
execute: jest.fn().mockImplementation(async (operation) => {
return await operation();
}),
state: "closed",
failures: 0,
};
// Mock the constructor dependencies
jest.mocked(require("../../../adapters/unified-api.js")).UnifiedAPI = jest
.fn()
.mockImplementation(() => mockUnifiedAPI);
jest.mocked(require("../../../utils/logger.js")).Logger = jest
.fn()
.mockImplementation(() => mockLogger);
// Create the streaming API instance with mocked dependencies
streamingAPI = new EnhancedStreamingAPI(mockConfig);
// Inject mocks into private properties (normally would be done through dependency injection)
(streamingAPI as any).bufferManager = mockBufferManager;
(streamingAPI as any).compressionEngine = mockCompressionEngine;
(streamingAPI as any).performanceMonitor = mockPerformanceMonitor;
(streamingAPI as any).circuitBreaker = mockCircuitBreaker;
});
afterEach(() => {
jest.clearAllMocks();
mockBuilder.clear();
});
// ==================== INITIALIZATION BEHAVIOR TESTS ====================
describe("Initialization Behavior Verification", () => {
// RED: Test should fail initially
it("should coordinate initialization with all collaborators", async () => {
// ARRANGE
const initializeSpy = jest.spyOn(streamingAPI, "initialize");
// ACT
await streamingAPI.initialize();
// ASSERT - Verify interactions, not state
expect(initializeSpy).toHaveBeenCalledTimes(1);
expect(mockUnifiedAPI.initialize).toHaveBeenCalled();
expect(mockLogger.info).toHaveBeenCalledWith(
"EnhancedStreamingAPI initialized",
);
});
it("should handle initialization failure gracefully", async () => {
// ARRANGE
const initError = new Error("Dependency initialization failed");
mockUnifiedAPI.initialize.mockRejectedValueOnce(initError);
// ACT & ASSERT
await expect(streamingAPI.initialize()).rejects.toThrow(
"Dependency initialization failed",
);
expect(mockLogger.error).toHaveBeenCalledWith(
"Failed to initialize streaming API",
initError,
);
});
it("should establish event handler contracts during initialization", async () => {
// ARRANGE & ACT
await streamingAPI.initialize();
// ASSERT - Verify event handler setup
expect(mockUnifiedAPI.on).toHaveBeenCalledWith(
"quality_changed",
expect.any(Function),
);
expect(mockUnifiedAPI.on).toHaveBeenCalledWith(
"connection_lost",
expect.any(Function),
);
expect(mockUnifiedAPI.on).toHaveBeenCalledWith(
"buffer_overflow",
expect.any(Function),
);
});
});
// ==================== CONNECTION MANAGEMENT BEHAVIOR ====================
describe("Connection Management Behavior", () => {
beforeEach(async () => {
await streamingAPI.initialize();
});
it("should coordinate connection establishment with configuration validation", async () => {
// ARRANGE
const streamingConfig = MockFactory.createStreamingConfig();
const connectionSpy = jest.spyOn(streamingAPI, "connect");
// ACT
await streamingAPI.connect(streamingConfig);
// ASSERT - Verify behavior coordination
expect(connectionSpy).toHaveBeenCalledWith(streamingConfig);
expect(mockLogger.info).toHaveBeenCalledWith(
"Establishing streaming connection",
expect.objectContaining({
protocol: streamingConfig.protocol,
}),
);
});
it("should validate configuration before establishing connection", async () => {
// ARRANGE
const invalidConfig = {
...MockFactory.createStreamingConfig(),
bufferSize: -1, // Invalid buffer size
protocol: "invalid-protocol" as any,
};
// ACT & ASSERT
await expect(streamingAPI.connect(invalidConfig)).rejects.toThrow();
expect(mockLogger.error).toHaveBeenCalledWith(
"Failed to establish streaming connection",
expect.any(Error),
);
});
it("should emit connection events for monitoring coordination", async () => {
// ARRANGE
const streamingConfig = MockFactory.createStreamingConfig();
const emitSpy = jest.spyOn(streamingAPI, "emit");
// ACT
await streamingAPI.connect(streamingConfig);
// ASSERT
expect(emitSpy).toHaveBeenCalledWith(
"connection:established",
expect.objectContaining({
config: streamingConfig,
}),
);
});
});
// ==================== STREAMING BEHAVIOR VERIFICATION ====================
describe("Streaming Behavior with Mock Interactions", () => {
const mockRequest = {
sessionId: "test-session-123",
streamType: "video",
config: {
quality: "high",
maxLatency: 1000,
maxErrorRate: 0.1,
},
};
beforeEach(async () => {
await streamingAPI.initialize();
await streamingAPI.connect(MockFactory.createStreamingConfig());
});
it("should orchestrate streaming pipeline with buffer management", async () => {
// ARRANGE
const mockDataSource = createMockAsyncGenerator([
"chunk1",
"chunk2",
"chunk3",
]);
jest
.spyOn(streamingAPI as any, "createDataSource")
.mockReturnValue(mockDataSource);
// ACT
const chunks: any[] = [];
for await (const chunk of streamingAPI.stream(mockRequest)) {
chunks.push(chunk);
if (chunk.final) break;
}
// ASSERT - Verify interaction patterns
expect(mockBufferManager.createBuffer).toHaveBeenCalled();
expect(mockCompressionEngine.compress).toHaveBeenCalled();
expect(mockPerformanceMonitor.recordChunk).toHaveBeenCalled();
expect(chunks.length).toBeGreaterThan(0);
expect(chunks[chunks.length - 1].final).toBe(true);
});
it("should coordinate error recovery with circuit breaker", async () => {
// ARRANGE
const streamError = new Error("Stream processing failed");
mockCircuitBreaker.execute.mockRejectedValueOnce(streamError);
// ACT & ASSERT
await expect(async () => {
for await (const chunk of streamingAPI.stream(mockRequest)) {
// Stream should fail
}
}).rejects.toThrow("Stream processing failed");
expect(mockPerformanceMonitor.recordError).toHaveBeenCalledWith(
expect.any(String),
streamError,
);
});
it("should implement backpressure coordination with buffer manager", async () => {
// ARRANGE
const buffer = mockBufferManager.createBuffer();
buffer.shouldPause.mockReturnValue(true); // Simulate backpressure
const mockDataSource = createMockAsyncGenerator(["chunk1", "chunk2"]);
jest
.spyOn(streamingAPI as any, "createDataSource")
.mockReturnValue(mockDataSource);
// ACT
const chunks: any[] = [];
for await (const chunk of streamingAPI.stream(mockRequest)) {
chunks.push(chunk);
if (chunks.length >= 2) break; // Limit test iterations
}
// ASSERT - Verify backpressure handling
expect(buffer.shouldPause).toHaveBeenCalled();
expect(buffer.enqueue).toHaveBeenCalled();
});
});
// ==================== QUALITY ADAPTATION BEHAVIOR ====================
describe("Quality Adaptation Behavior Coordination", () => {
beforeEach(async () => {
await streamingAPI.initialize();
});
it("should coordinate quality changes with performance monitoring", async () => {
// ARRANGE
const adaptationRequest = {
sessionId: "test-session",
targetQuality: "adaptive" as const,
networkConditions: {
bandwidth: { download: 1000000 },
latency: { rtt: 150 },
quality: { packetLoss: 0.02 },
},
deviceConstraints: {
cpu: { usage: 80 },
memory: { usage: 70 },
},
preferences: {
prioritizeLatency: true,
maxBitrate: 1500000,
},
};
// ACT
const result = await streamingAPI.adaptQuality(adaptationRequest);
// ASSERT - Verify coordination behavior
expect(result.success).toBe(true);
expect(result.data.adaptedQuality).toBeDefined();
expect(mockLogger.info).toHaveBeenCalledWith(
"Adapting stream quality",
expect.objectContaining({
sessionId: adaptationRequest.sessionId,
targetQuality: "adaptive",
}),
);
});
it("should maintain quality contracts when conditions are optimal", async () => {
// ARRANGE
const optimalRequest = {
sessionId: "test-session",
targetQuality: "high" as const,
networkConditions: {
bandwidth: { download: 50000000 },
latency: { rtt: 20 },
quality: { packetLoss: 0.001 },
},
deviceConstraints: {
cpu: { usage: 30 },
memory: { usage: 40 },
},
preferences: {
prioritizeQuality: true,
},
};
// ACT
const result = await streamingAPI.adaptQuality(optimalRequest);
// ASSERT - Verify quality maintenance
expect(result.success).toBe(true);
expect(result.data.adaptedQuality.level).toBe("high");
expect(result.data.adaptationReason).toBe("optimal_conditions");
});
});
// ==================== ERROR HANDLING BEHAVIOR ====================
describe("Error Handling and Recovery Coordination", () => {
beforeEach(async () => {
await streamingAPI.initialize();
});
it("should coordinate circuit breaker responses to repeated failures", async () => {
// ARRANGE
const sessionId = "test-session-failures";
const serviceError = new Error("Service unavailable");
// Mock repeated failures
mockUnifiedAPI.createSession = jest
.fn()
.mockRejectedValueOnce(serviceError)
.mockRejectedValueOnce(serviceError)
.mockRejectedValueOnce(serviceError)
.mockRejectedValueOnce(serviceError)
.mockRejectedValueOnce(serviceError);
// ACT & ASSERT
const failurePromises = Array.from({ length: 5 }, (_, i) =>
streamingAPI
.createSession(`${sessionId}-${i}`, "video", {} as any)
.catch((error) => ({ error })),
);
const results = await Promise.all(failurePromises);
const failures = results.filter((r) => "error" in r);
expect(failures.length).toBe(5);
expect(mockLogger.error).toHaveBeenCalledTimes(5);
});
it("should implement retry coordination with exponential backoff", async () => {
// ARRANGE
const sessionId = "test-session-retry";
let attemptCount = 0;
const flakyOperation = jest.fn().mockImplementation(() => {
attemptCount++;
if (attemptCount < 3) {
throw new Error("Temporary failure");
}
return MockFactory.createServiceResponse(true, { id: sessionId });
});
jest
.spyOn(streamingAPI as any, "executeWithRetry")
.mockImplementation(flakyOperation);
// ACT
const result = await streamingAPI.createSession(
sessionId,
"video",
{} as any,
);
// ASSERT
expect(result.success).toBe(true);
expect(attemptCount).toBe(3); // Verify retry behavior
});
it("should handle network disconnection with graceful degradation", async () => {
// ARRANGE
const sessionId = "test-session-disconnect";
const networkError = new Error("Network disconnected");
const eventSpy = jest.spyOn(streamingAPI, "emit");
// ACT
streamingAPI.emit("connection:lost", { sessionId, error: networkError });
// ASSERT
expect(eventSpy).toHaveBeenCalledWith("connection:lost", {
sessionId,
error: networkError,
});
});
});
// ==================== PERFORMANCE CONTRACT VERIFICATION ====================
describe("Performance Contract Verification", () => {
beforeEach(async () => {
await streamingAPI.initialize();
});
it("should meet performance requirements for session creation", async () => {
// ARRANGE
const performanceTest = PerformanceTester.createPerformanceTest(
"session_creation",
() => streamingAPI.createSession("perf-test", "video", {} as any),
100, // 100ms max
5, // 5 iterations
);
// ACT & ASSERT
await performanceTest();
});
it("should provide comprehensive performance metrics contract", async () => {
// ARRANGE
const sessionId = "metrics-test-session";
await streamingAPI.createSession(sessionId, "video", {} as any);
// ACT
const metricsResponse = await streamingAPI.getStreamingMetrics(sessionId);
// ASSERT
expect(metricsResponse.success).toBe(true);
ContractTester.validatePerformanceMetrics(
metricsResponse.data.performance,
);
});
it("should track quality adaptation events with performance correlation", async () => {
// ARRANGE
const sessionId = "quality-metrics-session";
await streamingAPI.createSession(sessionId, "video", {} as any);
// Perform quality adaptation
await streamingAPI.adaptQuality({
sessionId,
targetQuality: "medium",
networkConditions: { bandwidth: { download: 1000000 } },
deviceConstraints: {},
preferences: {},
});
// ACT
const metrics = await streamingAPI.getStreamingMetrics(sessionId);
// ASSERT
expect(metrics.data.qualityAdaptations).toBeGreaterThan(0);
expect(metrics.data.adaptationHistory).toBeDefined();
expect(Array.isArray(metrics.data.adaptationHistory)).toBe(true);
});
});
// ==================== MULTI-MODAL PROCESSING COORDINATION ====================
describe("Multi-Modal Processing Coordination", () => {
beforeEach(async () => {
await streamingAPI.initialize();
await streamingAPI.createSession(
"multimodal-session",
"multimodal",
{} as any,
);
});
it("should coordinate multi-modal chunk processing with synchronization", async () => {
// ARRANGE
const multiModalChunk = {
id: "chunk-001",
type: "mixed" as const,
timestamp: new Date(),
sequence: 1,
data: {
video: TestDataGenerator.testBuffer(1024),
audio: TestDataGenerator.testBuffer(512),
text: "sample synchronized text",
metadata: { scene: "outdoor", lighting: "bright" },
},
synchronization: {
globalTimestamp: new Date(),
mediaTimestamp: 1000,
sequenceId: "seq-001",
},
quality: {
video: { resolution: "1080p", bitrate: 2000000 },
audio: { sampleRate: 48000, bitrate: 128000 },
},
processing: {
compression: "gzip",
encryption: false,
validation: true,
},
metadata: {
size: 8192,
checksum: "abc123",
contentType: "multimodal/mixed",
},
};
// ACT
const result = await streamingAPI.processMultiModalChunk(
"multimodal-session",
multiModalChunk,
);
// ASSERT
expect(result.success).toBe(true);
expect(result.data.processed).toBe(true);
expect(result.data.chunkId).toBe(multiModalChunk.id);
expect(mockLogger.debug).toHaveBeenCalledWith(
"Processing multi-modal chunk",
expect.objectContaining({
sessionId: "multimodal-session",
chunkId: multiModalChunk.id,
type: multiModalChunk.type,
sequence: multiModalChunk.sequence,
}),
);
});
it("should maintain synchronization contracts across chunk boundaries", async () => {
// ARRANGE
const chunks = [
createMultiModalChunk("video", 1, "seq-001"),
createMultiModalChunk("audio", 2, "seq-001"),
createMultiModalChunk("text", 3, "seq-001"),
];
// ACT
const results = await Promise.all(
chunks.map((chunk) =>
streamingAPI.processMultiModalChunk("multimodal-session", chunk),
),
);
// ASSERT
expect(results.every((result) => result.success)).toBe(true);
// Verify synchronization groups are consistent
const syncGroups = results.map((r) => r.data.synchronizationGroup);
expect(new Set(syncGroups).size).toBe(1); // All should have same sync group
});
});
// ==================== CLEANUP AND RESOURCE MANAGEMENT ====================
describe("Resource Management and Cleanup Coordination", () => {
it("should coordinate graceful shutdown with all collaborators", async () => {
// ARRANGE
await streamingAPI.initialize();
const session1 = "session-1";
const session2 = "session-2";
await streamingAPI.createSession(session1, "video", {} as any);
await streamingAPI.createSession(session2, "audio", {} as any);
// ACT
await streamingAPI.shutdown();
// ASSERT - Verify cleanup coordination
expect(mockUnifiedAPI.shutdown).toHaveBeenCalled();
expect(mockBufferManager.cleanup).toHaveBeenCalled();
expect(mockCompressionEngine.cleanup).toHaveBeenCalled();
expect(mockLogger.info).toHaveBeenCalledWith(
"Enhanced Streaming API shutdown complete",
);
});
it("should handle session termination with resource cleanup", async () => {
// ARRANGE
await streamingAPI.initialize();
const sessionId = "test-session-terminate";
await streamingAPI.createSession(sessionId, "multimodal", {} as any);
// ACT
const result = await streamingAPI.endSession(sessionId);
// ASSERT
expect(result.success).toBe(true);
expect(mockLogger.info).toHaveBeenCalledWith("Ending streaming session", {
sessionId,
});
});
});
// ==================== CONTRACT TESTING ====================
describe("Service Contract Validation", () => {
beforeEach(async () => {
await streamingAPI.initialize();
});
it("should maintain service response contract for all operations", async () => {
// ARRANGE & ACT
const sessionResult = await streamingAPI.createSession(
"contract-test",
"video",
{} as any,
);
const metricsResult =
await streamingAPI.getStreamingMetrics("contract-test");
// ASSERT
ContractTester.validateServiceResponse(sessionResult);
ContractTester.validateServiceResponse(metricsResult);
});
it("should maintain event emitter contract", async () => {
// ARRANGE
const expectedEvents = [
"connection:established",
"connection:lost",
"buffer:overflow",
"quality:changed",
"session:created",
"session:ended",
];
// ACT & ASSERT
ContractTester.validateEventEmitter(streamingAPI, expectedEvents);
});
});
// ==================== ERROR SCENARIO TESTING ====================
describe("Comprehensive Error Scenario Coverage", () => {
beforeEach(async () => {
await streamingAPI.initialize();
});
it("should handle all network error scenarios", async () => {
const networkErrorTest = ErrorScenarioTester.createErrorInjectionTest(
"network",
() => streamingAPI.connect(MockFactory.createStreamingConfig()),
);
await networkErrorTest();
});
it("should handle validation error scenarios", async () => {
const validationErrorTest = ErrorScenarioTester.createErrorInjectionTest(
"validation",
() =>
streamingAPI.createSession("", "invalid-type" as any, null as any),
);
await validationErrorTest();
});
it("should handle service error scenarios", async () => {
const serviceErrorTest = ErrorScenarioTester.createErrorInjectionTest(
"service",
() => streamingAPI.adaptQuality({} as any),
);
await serviceErrorTest();
});
});
});
// ==================== HELPER FUNCTIONS ====================
/**
* Creates a mock async generator for testing streaming behavior
*/
function createMockAsyncGenerator<T>(items: T[]): AsyncIterable<T> {
return {
[Symbol.asyncIterator]: async function* () {
for (const item of items) {
yield item;
}
},
};
}
/**
* Creates a multi-modal chunk for synchronization testing
*/
function createMultiModalChunk(
type: string,
sequence: number,
sequenceId: string,
) {
return {
id: `chunk-${sequence}`,
type: type as any,
timestamp: new Date(),
sequence,
data: { [type]: TestDataGenerator.testBuffer(512) },
synchronization: {
globalTimestamp: new Date(1000),
mediaTimestamp: 1000,
sequenceId,
},
quality: {},
processing: {},
metadata: {
size: 512,
checksum: `checksum-${sequence}`,
contentType: `${type}/test`,
},
};
}
/**
* RED-GREEN-REFACTOR CYCLE DOCUMENTATION:
*
* Each test in this suite follows the London School TDD approach:
*
* 1. RED Phase:
* - Write a failing test that describes the expected interaction
* - Focus on HOW objects should collaborate, not WHAT they contain
* - Use mocks to define contracts between collaborators
*
* 2. GREEN Phase:
* - Write minimal implementation to make the test pass
* - Focus on making the interactions work correctly
* - Don't worry about optimization yet
*
* 3. REFACTOR Phase:
* - Improve the code structure while keeping tests green
* - Extract methods, improve naming, optimize performance
* - Tests should continue to pass without modification
*
* Key London School Principles Applied:
* - Mock ALL external dependencies
* - Test interactions, not state
* - Use mocks to drive design decisions
* - Focus on object collaboration patterns
* - Verify behavior through mock assertions
*/