integration test placeholders
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/**
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* Integration Test: API Connection Monitor Health Checks
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*
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* Tests the orchestration logic of API connection health monitoring:
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* - ApiConnectionMonitor: Tracks connection status, performs health checks, records metrics
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* - Validates that health monitoring correctly interacts with its Ports (API endpoints, event emitters)
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* - Uses In-Memory adapters for fast, deterministic testing
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*
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* Focus: Business logic orchestration, NOT UI rendering
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*/
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import { describe, it, expect, beforeAll, afterAll, beforeEach, vi } from 'vitest';
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import { InMemoryHealthCheckAdapter } from '../../../adapters/health/persistence/inmemory/InMemoryHealthCheckAdapter';
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import { InMemoryEventPublisher } from '../../../adapters/events/InMemoryEventPublisher';
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import { ApiConnectionMonitor } from '../../../apps/website/lib/api/base/ApiConnectionMonitor';
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describe('API Connection Monitor Health Orchestration', () => {
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let healthCheckAdapter: InMemoryHealthCheckAdapter;
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let eventPublisher: InMemoryEventPublisher;
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let apiConnectionMonitor: ApiConnectionMonitor;
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beforeAll(() => {
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// TODO: Initialize In-Memory health check adapter and event publisher
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// healthCheckAdapter = new InMemoryHealthCheckAdapter();
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// eventPublisher = new InMemoryEventPublisher();
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// apiConnectionMonitor = new ApiConnectionMonitor('/health');
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});
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beforeEach(() => {
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// TODO: Clear all In-Memory repositories before each test
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// healthCheckAdapter.clear();
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// eventPublisher.clear();
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});
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describe('PerformHealthCheck - Success Path', () => {
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it('should perform successful health check and record metrics', async () => {
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// TODO: Implement test
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// Scenario: API is healthy and responsive
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// Given: HealthCheckAdapter returns successful response
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// And: Response time is 50ms
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// When: performHealthCheck() is called
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// Then: Health check result should show healthy=true
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// And: Response time should be recorded
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// And: EventPublisher should emit HealthCheckCompletedEvent
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// And: Connection status should be 'connected'
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});
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it('should perform health check with slow response time', async () => {
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// TODO: Implement test
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// Scenario: API is healthy but slow
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// Given: HealthCheckAdapter returns successful response
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// And: Response time is 500ms
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// When: performHealthCheck() is called
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// Then: Health check result should show healthy=true
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// And: Response time should be recorded as 500ms
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// And: EventPublisher should emit HealthCheckCompletedEvent
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});
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it('should handle multiple successful health checks', async () => {
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// TODO: Implement test
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// Scenario: Multiple consecutive successful health checks
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// Given: HealthCheckAdapter returns successful responses
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// When: performHealthCheck() is called 3 times
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// Then: All health checks should show healthy=true
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// And: Total requests should be 3
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// And: Successful requests should be 3
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// And: Failed requests should be 0
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// And: Average response time should be calculated
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});
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});
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describe('PerformHealthCheck - Failure Path', () => {
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it('should handle failed health check and record failure', async () => {
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// TODO: Implement test
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// Scenario: API is unreachable
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// Given: HealthCheckAdapter throws network error
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// When: performHealthCheck() is called
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// Then: Health check result should show healthy=false
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// And: EventPublisher should emit HealthCheckFailedEvent
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// And: Connection status should be 'disconnected'
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// And: Consecutive failures should be 1
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});
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it('should handle multiple consecutive failures', async () => {
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// TODO: Implement test
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// Scenario: API is down for multiple checks
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// Given: HealthCheckAdapter throws errors 3 times
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// When: performHealthCheck() is called 3 times
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// Then: All health checks should show healthy=false
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// And: Total requests should be 3
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// And: Failed requests should be 3
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// And: Consecutive failures should be 3
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// And: Connection status should be 'disconnected'
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});
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it('should handle timeout during health check', async () => {
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// TODO: Implement test
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// Scenario: Health check times out
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// Given: HealthCheckAdapter times out after 30 seconds
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// When: performHealthCheck() is called
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// Then: Health check result should show healthy=false
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// And: EventPublisher should emit HealthCheckTimeoutEvent
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// And: Consecutive failures should increment
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});
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});
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describe('Connection Status Management', () => {
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it('should transition from disconnected to connected after recovery', async () => {
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// TODO: Implement test
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// Scenario: API recovers from outage
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// Given: Initial state is disconnected with 3 consecutive failures
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// And: HealthCheckAdapter starts returning success
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// When: performHealthCheck() is called
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// Then: Connection status should transition to 'connected'
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// And: Consecutive failures should reset to 0
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// And: EventPublisher should emit ConnectedEvent
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});
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it('should degrade status when reliability drops below threshold', async () => {
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// TODO: Implement test
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// Scenario: API has intermittent failures
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// Given: 5 successful requests followed by 3 failures
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// When: performHealthCheck() is called for each
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// Then: Connection status should be 'degraded'
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// And: Reliability should be calculated correctly (5/8 = 62.5%)
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});
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it('should handle checking status when no requests yet', async () => {
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// TODO: Implement test
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// Scenario: Monitor just started
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// Given: No health checks performed yet
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// When: getStatus() is called
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// Then: Status should be 'checking'
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// And: isAvailable() should return false
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});
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});
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describe('Health Metrics Calculation', () => {
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it('should correctly calculate reliability percentage', async () => {
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// TODO: Implement test
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// Scenario: Calculate reliability from mixed results
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// Given: 7 successful requests and 3 failed requests
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// When: getReliability() is called
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// Then: Reliability should be 70%
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});
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it('should correctly calculate average response time', async () => {
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// TODO: Implement test
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// Scenario: Calculate average from varying response times
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// Given: Response times of 50ms, 100ms, 150ms
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// When: getHealth() is called
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// Then: Average response time should be 100ms
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});
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it('should handle zero requests for reliability calculation', async () => {
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// TODO: Implement test
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// Scenario: No requests made yet
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// Given: No health checks performed
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// When: getReliability() is called
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// Then: Reliability should be 0
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});
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});
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describe('Health Check Endpoint Selection', () => {
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it('should try multiple endpoints when primary fails', async () => {
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// TODO: Implement test
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// Scenario: Primary endpoint fails, fallback succeeds
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// Given: /health endpoint fails
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// And: /api/health endpoint succeeds
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// When: performHealthCheck() is called
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// Then: Should try /health first
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// And: Should fall back to /api/health
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// And: Health check should be successful
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});
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it('should handle all endpoints being unavailable', async () => {
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// TODO: Implement test
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// Scenario: All health endpoints are down
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// Given: /health, /api/health, and /status all fail
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// When: performHealthCheck() is called
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// Then: Health check should show healthy=false
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// And: Should record failure for all attempted endpoints
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});
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});
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describe('Event Emission Patterns', () => {
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it('should emit connected event when transitioning to connected', async () => {
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// TODO: Implement test
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// Scenario: Successful health check after disconnection
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// Given: Current status is disconnected
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// And: HealthCheckAdapter returns success
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// When: performHealthCheck() is called
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// Then: EventPublisher should emit ConnectedEvent
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// And: Event should include timestamp and response time
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});
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it('should emit disconnected event when threshold exceeded', async () => {
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// TODO: Implement test
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// Scenario: Consecutive failures reach threshold
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// Given: 2 consecutive failures
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// And: Third failure occurs
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// When: performHealthCheck() is called
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// Then: EventPublisher should emit DisconnectedEvent
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// And: Event should include failure count
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});
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it('should emit degraded event when reliability drops', async () => {
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// TODO: Implement test
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// Scenario: Reliability drops below threshold
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// Given: 5 successful, 3 failed requests (62.5% reliability)
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// When: performHealthCheck() is called
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// Then: EventPublisher should emit DegradedEvent
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// And: Event should include current reliability percentage
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});
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});
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describe('Error Handling', () => {
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it('should handle network errors gracefully', async () => {
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// TODO: Implement test
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// Scenario: Network error during health check
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// Given: HealthCheckAdapter throws ECONNREFUSED
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// When: performHealthCheck() is called
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// Then: Should not throw unhandled error
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// And: Should record failure
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// And: Should maintain connection status
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});
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it('should handle malformed response from health endpoint', async () => {
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// TODO: Implement test
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// Scenario: Health endpoint returns invalid JSON
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// Given: HealthCheckAdapter returns malformed response
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// When: performHealthCheck() is called
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// Then: Should handle parsing error
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// And: Should record as failed check
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// And: Should emit appropriate error event
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});
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it('should handle concurrent health check calls', async () => {
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// TODO: Implement test
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// Scenario: Multiple simultaneous health checks
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// Given: performHealthCheck() is already running
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// When: performHealthCheck() is called again
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// Then: Should return existing check result
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// And: Should not start duplicate checks
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});
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});
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});
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