/**
* Tests for HTTP client functionality
*/
// Mock fetch
const mockFetch = jest.fn();
global.fetch = mockFetch as any;
describe('HTTP Client', () => {
beforeEach(() => {
mockFetch.mockClear();
});
describe('Mock HTTP Client', () => {
it('should handle successful requests', async () => {
const mockResponse = {
ok: true,
status: 200,
json: () => Promise.resolve({ success: true }),
text: () => Promise.resolve('success'),
};
mockFetch.mockResolvedValueOnce(mockResponse);
const response = await fetch('https://example.com/api');
const data = await response.json();
expect(mockFetch).toHaveBeenCalledWith('https://example.com/api');
expect(data).toEqual({ success: true });
});
it('should handle failed requests', async () => {
const mockResponse = {
ok: false,
status: 404,
statusText: 'Not Found',
};
mockFetch.mockResolvedValueOnce(mockResponse);
const response = await fetch('https://example.com/api');
expect(response.ok).toBe(false);
expect(response.status).toBe(404);
});
it('should handle network errors', async () => {
mockFetch.mockRejectedValueOnce(new Error('Network error'));
await expect(fetch('https://example.com/api')).rejects.toThrow('Network error');
});
});
describe('Performance Monitoring Concepts', () => {
it('should track request statistics', () => {
const stats = {
totalRequests: 0,
successfulRequests: 0,
failedRequests: 0,
totalResponseTime: 0,
averageResponseTime: 0,
successRate: 0,
requestsByStatus: {} as Record<number, number>,
requestsByDomain: {} as Record<string, number>,
};
// Simulate successful request
stats.totalRequests++;
stats.successfulRequests++;
stats.totalResponseTime += 100;
stats.averageResponseTime = stats.totalResponseTime / stats.totalRequests;
stats.successRate = (stats.successfulRequests / stats.totalRequests) * 100;
stats.requestsByStatus[200] = (stats.requestsByStatus[200] || 0) + 1;
stats.requestsByDomain['example.com'] = (stats.requestsByDomain['example.com'] || 0) + 1;
expect(stats.totalRequests).toBe(1);
expect(stats.successfulRequests).toBe(1);
expect(stats.successRate).toBe(100);
expect(stats.averageResponseTime).toBe(100);
expect(stats.requestsByStatus[200]).toBe(1);
expect(stats.requestsByDomain['example.com']).toBe(1);
});
it('should handle failed request statistics', () => {
const stats = {
totalRequests: 1,
successfulRequests: 0,
failedRequests: 1,
totalResponseTime: 50,
averageResponseTime: 50,
successRate: 0,
requestsByStatus: { 404: 1 } as Record<number, number>,
requestsByDomain: { 'example.com': 1 } as Record<string, number>,
};
expect(stats.totalRequests).toBe(1);
expect(stats.failedRequests).toBe(1);
expect(stats.successRate).toBe(0);
expect(stats.requestsByStatus[404]).toBe(1);
});
it('should generate performance report format', () => {
const stats = {
totalRequests: 10,
successfulRequests: 9,
failedRequests: 1,
averageResponseTime: 150,
successRate: 90,
requestsByStatus: { 200: 9, 404: 1 },
requestsByDomain: { 'developer.apple.com': 10 },
};
const report = `# HTTP Client Performance Report
## Overall Statistics
- **Total Requests:** ${stats.totalRequests}
- **Successful Requests:** ${stats.successfulRequests}
- **Failed Requests:** ${stats.failedRequests}
- **Success Rate:** ${stats.successRate.toFixed(2)}%
- **Average Response Time:** ${stats.averageResponseTime.toFixed(0)}ms
## Performance Insights
${stats.successRate >= 95 ? '✅ **Excellent reliability**' :
stats.successRate >= 90 ? '⚠️ **Good reliability**' :
'❌ **Poor reliability**'} - Success rate ${stats.successRate >= 90 ? 'above' : 'below'} 90%
${stats.averageResponseTime < 1000 ? '✅ **Fast response times**' :
stats.averageResponseTime < 3000 ? '⚠️ **Moderate response times**' :
'❌ **Slow response times**'} - Average ${stats.averageResponseTime < 1000 ? 'under 1 second' :
stats.averageResponseTime < 3000 ? 'under 3 seconds' : 'over 3 seconds'}`;
expect(report).toContain('HTTP Client Performance Report');
expect(report).toContain('**Total Requests:** 10');
expect(report).toContain('**Success Rate:** 90.00%');
expect(report).toContain('Good reliability');
});
});
describe('Concurrency Control Concepts', () => {
it('should manage request queue', () => {
const queue = {
activeRequests: 0,
queuedRequests: 0,
maxConcurrent: 5,
};
// Simulate adding requests
for (let i = 0; i < 7; i++) {
if (queue.activeRequests < queue.maxConcurrent) {
queue.activeRequests++;
} else {
queue.queuedRequests++;
}
}
expect(queue.activeRequests).toBe(5);
expect(queue.queuedRequests).toBe(2);
});
it('should process queued requests', () => {
const queue = {
activeRequests: 5,
queuedRequests: 3,
maxConcurrent: 5,
};
// Simulate completing a request
queue.activeRequests--;
if (queue.queuedRequests > 0) {
queue.queuedRequests--;
queue.activeRequests++;
}
expect(queue.activeRequests).toBe(5);
expect(queue.queuedRequests).toBe(2);
});
});
});
